Search

Your search keyword '"IESL"' showing total 421 results
Start Over Author "IESL"
421 results on '"IESL"'

1. Clarice Lispector e Rodrigo S. M.: Uma narrativa que borda o sujeito do desamparo

Author

Ieslei Miguel Souza and Priscilla Melo Ribeiro de Lima

Subjects
A Hora da Estrela, Rodrigo S. M., estranho, angústia, desamparo, Psychology, BF1-990
Abstract

Resumo: Este estudo se fundamenta na teoria psicanalítica, sendo os conceitos de estranho, angústia e desamparo pontos de convergência entre a psicanálise e a produção literária de Clarice Lispector, mais especificamente A Hora da Estrela de 1977. Partindo das falhas de uma sociedade que não cumpre a promessa de amparar os cidadãos do mal-estar gerado por ela, literatura e psicanálise se somam. Para isso, o trabalho aborda o processo de escrita literária como fruto de inquietação, de angústia e de desamparo do sujeito; um processo criativo vislumbrado em Clarice Lispector. Na tentativa de melhor compreender os conceitos já descritos, estudo teórico foi realizado, como também a obra da autora. Teoricamente a pesquisa se alicerça em Freud, Kehl, Dunker, Birman entre outros. Como resultado final é possível dizer que, em A Hora da Estrela, o personagem Rodrigo S. M., ilustra bem o tipo de desamparo psicológico proposto a estudar. Por meio de Rodrigo S. M., a produção artística dá suporte ao desamparo psíquico, quando as demais sustentações criadas pelo homem falham, deixando o sujeito à condição de construí-las.

Published
2023
Full Text
View/download PDF

2. Optomechanical hot-spots in metallic nanorod-polymer nanocomposites

Author

Thomas Vasileiadis, Adnane Noual, Yuchen Wang, Bartlomiej Graczykowski, Bahram Djafari-Rouhani, Shu Yang, George Fytas, Max Planck Society, Adam Mickiewicz University in Poznań (UAM), University of Mohammed I - Université Mohammed Premier, University of Pennsylvania, Max Planck Institute for Polymer Research, Max-Planck-Gesellschaft, Physique - IEMN (PHYSIQUE - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Action Grant Agreement 101003436 – PLASMMONS. G.F. acknowledges the support by ERC AdG SmartPhon (Grant 694977). T.V. acknowledges the financial support from the Polish National Science Centre (No. UMO-2021/43/D/ST3/02526). B.G. acknowledges the financial support from the Polish National Science Centre (No. UMO-2018/31/D/ST3/03882). B.D.R. and A.N. acknowledge the computer facilities provided by the group ephoni at Institut d’Electronique, Microélectronique and Nanotechnologie, University of Lille. S.Y. acknowledges the support by the National Science Foundation (NSF), DMR/Polymer program, No. DMR-210484. We thank Emerson Coy (NanoBioMedical Centre, Adam Mickiewicz University) for his assistance with the TEM measurements of Au NRs in PVA., European Project: 101003436,H2020,231361,PLASMMONS(2020), European Project: 694977,H2020,Small - and nano - scale soft phononics(2016), Adam Mickiewicz University in Poznań [UAM], Physique - IEMN [PHYSIQUE - IEMN], and Institute of Electronic Structure and Laser [FORTH-IESL]

Subjects
General Engineering, General Physics and Astronomy, Optomechanics, optomechanics, Nanocomposites, polymer nanocomposites, Brillouin light scattering, plasmonic enhancement, elastic vibrations, nanorods, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Plasmonics, General Materials Science, Nanorods
Abstract

Experimental and computational study of optomechanical interactions in plasmonic nanorod - polymer nanocomposites. Plasmonic coupling between adjacent metallic nanoparticles can be exploited for acousto-plasmonics, single-molecule sensing, and photochemistry. Light absorption or electron probes can be used to study plasmons and their interactions, but their use is challenging for disordered systems and colloids dispersed in insulating matrices. Here, we investigate the effect of plasmonic coupling on optomechanics with Brillouin light spectroscopy (BLS) in a prototypical metal–polymer nanocomposite, gold nanorods (Au NRs) in polyvinyl alcohol. The intensity of the light inelastically scattered on thermal phonons captured by BLS is strongly affected by the wavelength of the probing light. When light is resonant with the transverse plasmons, BLS reveals mostly the normal vibrational modes of single NRs. For lower energy off-resonant light, BLS is dominated by coupled bending modes of NR dimers. The experimental results, supported by optomechanical calculations, document plasmonically enhanced BLS and reveal energy-dependent confinement of coupled plasmons close to the tips of NR dimers, generating BLS hot-spots. Our work establishes BLS as an optomechanical probe of plasmons and promotes nanorod–soft matter nanocomposites for acousto-plasmonic applications. This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Action Grant Agreement 101003436 – PLASMMONS. G.F. acknowledges the support by ERC AdG SmartPhon (Grant 694977). T.V. acknowledges the financial support from the Polish National Science Centre (No. UMO-2021/43/D/ST3/02526). B.G. acknowledges the financial support from the Polish National Science Centre (No. UMO-2018/31/D/ST3/03882). B.D.R. and A.N. acknowledge the computer facilities provided by the group ephoni at Institut d’Electronique, Microélectronique and Nanotechnologie, University of Lille. S.Y. acknowledges the support by the National Science Foundation (NSF), DMR/Polymer program, No. DMR-210484.

Published
2022
Full Text
View/download PDF

9. Gelation and Re-entrance in Mixtures of Soft Colloids and Linear Polymers of Equal Size

Author

Daniele Parisi, Domenico Truzzolillo, Ali H. Slim, Phillippe Dieudonné-George, Suresh Narayanan, Jacinta C. Conrad, Vishnu D. Deepak, Mario Gauthier, Dimitris Vlassopoulos, Product Technology, University of Groningen [Groningen], Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Laboratoire Charles Coulomb (L2C), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), University of Houston, Argonne National Laboratory [Lemont] (ANL), Department of Chemistry [Waterloo], University of Waterloo [Waterloo], and European Project: H2020-MCSA-ITN-2014,Colldense

Subjects
Inorganic Chemistry, [CHIM.POLY]Chemical Sciences/Polymers, Polymers and Plastics, Organic Chemistry, Materials Chemistry, Soft Condensed Matter (cond-mat.soft), FOS: Physical sciences, Colloids, Condensed Matter - Soft Condensed Matter, Polymer, Rheology, Gels, [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
Abstract

Liquid mixtures composed of colloidal particles and much smaller non-adsorbing linear homopolymers can undergo a gelation transition due to polymer-mediated depletion forces. We now show that the addition of linear polymers to suspensions of soft colloids having the same hydrodynamic size yields a liquid-to-gel-to-re-entrant liquid transition. In particular, the dynamic state diagram of 1,4-polybutadiene star-linear polymer mixtures was determined with the help of linear viscoelastic and small angle X-ray scattering experiments. While keeping the star polymers below their nominal overlap concentration, a gel was formed upon increasing the linear polymer content. Further addition of linear chains yielded a re-entrant liquid. This unexpected behavior was rationalized by the interplay of three possible phenomena: (i) depletion interactions, driven by the size disparity between the stars and the polymer length scale which is the mesh size of this entanglement network; (ii) colloidal deswelling due to the increased osmotic pressure exerted onto the stars; and (iii) a concomitant progressive suppression of depletion efficiency on increasing polymer concentration due to reduced mesh size, hence a smaller range of attraction. Our results unveil an exciting new way to tailor the flow of soft colloids and highlight a largely unexplored path to engineer soft colloidal mixtures., Comment: 27 pages, 5 figures

Published
2023
Full Text
View/download PDF

10. Chitosan-Modified Polyethyleneimine Nanoparticles for Enhancing the Carboxylation Reaction and Plants’ CO2 Uptake

Author

Cyril Routier, Lorenzo Vallan, Yohann Daguerre, Marta Juvany, Emin Istif, Daniele Mantione, Cyril Brochon, Georges Hadziioannou, Åsa Strand, Torgny Näsholm, Eric Cloutet, Eleni Pavlopoulou, Eleni Stavrinidou, Laboratory of Organic Electronics [Norrköping, Sweden] (Department of Science and Technology), Linköping University (LIU), Laboratoire de Chimie des Polymères Organiques (LCPO), Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies, Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Umea Plant Science Center (UPSC), Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences (SLU)-Swedish University of Agricultural Sciences (SLU), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), and European Project: 800926,HyPhOE

Subjects
photosynthesis, [SDE.IE]Environmental Sciences/Environmental Engineering, Botany, Biochemistry and Molecular Biology, General Engineering, nanoparticles CO2 capture polyethyleneimine chitosan photosynthesis, General Physics and Astronomy, Botanik, CO2 capture, [CHIM.POLY]Chemical Sciences/Polymers, Nano Technology, nanoparticles, General Materials Science, chitosan, polyethyleneimine, Biokemi och molekylärbiologi
Abstract

Increasing plants photosynthetic efficienc y is a major challenge that must be addressed in order to cover the food demands of the growing population in the changing climate. Photosynthes i s is greatly limited at the initial carboxylation reaction, where CO2 is converted to the organic acid 3-PGA, catalyzed by the RuBisCO enzyme. RuBisCO has poor affinity for CO2, but also the CO2 concentration at the RuBisCO site is limited by the diffusion of atmospheric CO2 through the various leaf compartments to the reaction site. Beyond genetic engineer-ing, nanotechnology can offer a materials-based approach for enhancing photosynthesis, and yet, it has mostly been explored for the light-dependent reactions. In this work, we developed polyethyleneimine-based nanoparticl e s for enhancing the carbox-ylation reaction. We demonstrate that the nanoparticles can capture CO2 in the form of bicarbonate and increase the CO2 that reacts with the RuBisCO enzyme, enhancing the 3-PGA production in in vitro assays by 20%. The nanoparticles can be introduced to the plant via leaf infiltration and, because of the functionalization with chitosan oligomers, they do not induce any toxic effect to the plant. In the leaves, the nanoparticles localize in the apoplastic space but also spontaneously reach the chloroplasts where photosynthetic activity takes place. Their CO2 loading-dependent fluorescence verifies that, in vivo, they maintain their abi l i t y to capture CO2 and can be therefore reloaded with atmospheric CO2 while in planta. Our results contribute to the development of a nanomaterials-based CO2-concentrating mechanism in plants t h a t can potentially increase photosynthetic efficiency and overall plants CO2 storage. Funding Agencies|European Union [800926, 101042148]; Swedish Research Council [VR-2017-04910]; Swedish Government Strategic Research Area in Materials Science on Advanced Functional Materials at Linkoping University [2009-00971]; MCIN/AEI [Ayuda RYC2021-031668-I]

Published
2023
Full Text
View/download PDF

11. capacitances in 4H-SiC TI-VJFETs

Author

Kayambaki, M., Stavrinidis, A., Konstantinidis, George, Zekentes, K., Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Microelectronics Research Group, IESL-FORTH, P.O. Box 1385, 71110, Heraklion, Greece, Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation (IMEP-LAHC ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Ducroquet, Frédérique

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, Hardware_MEMORYSTRUCTURES, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [CHIM.MATE]Chemical Sciences/Material chemistry, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS, [PHYS.PHYS.PHYS-CHEM-PH] Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

session poster MoP.41; International audience

Published
2016

12. Multiscale organization of thermoplastic elastomers with varying content of hard segments

Author

Wilco P. J. Appel, Guilhem P. Baeza, Carel Frederik Constantijn Fitié, Ameur Louhichi, Evelyne Van Ruymbeke, Dimitris Vlassopoulos, Ashwinikumar Sharma, Luna Imperiali, Minne Paul Lettinga, Matériaux, ingénierie et science [Villeurbanne] ( MATEIS ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ) -Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ), University of Crete ( UOC ), Institute of Electronic Structure and Laser ( FORTH-IESL ), Foundation for Research and Technology - Hellas ( FORTH ), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), University of Crete [Heraklion] (UOC), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), and UCL - SST/IMCN/BSMA - Bio and soft matter

Subjects
Materials science, Condensation polymer, Polymers and Plastics, [ SPI.MAT ] Engineering Sciences [physics]/Materials, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, law.invention, [SPI.MAT]Engineering Sciences [physics]/Materials, Scattering, law, Materials Chemistry, H-bonds, Thermoplastic elastomer, Crystallization, Composite material, Thermoplastic elastomers, Small-angle X-ray scattering, Organic Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Amorphous solid, Melting point, Crystallite, 0210 nano-technology
Abstract

International audience; Thermoplastic elastomers (TPEs) based on segmented block-copolymers containing poly(tetrahydrofuran) (pTHF) and terephthalate-based diamide groups (T4T) were synthesized via poly-condensation. While pTHF is known to be flexible and amorphous at rest, the more rigid T4T crystallized in different ways depending on both chain composition and sample preparation conditions. Increasing the content of hard-segments (HS) from 5 to 20% in weight leads to a substantial increase of the melting point T-m by more than 60 degrees C. We have systematically investigated the multiscale (1 A - 50 nm) organization of the HSs (of fractions from 5% to 20%) by means of DSC, WAXS and (ultra) small angle X-ray scattering (U)SAXS. By increasing HS content, hence the rigidity of the chain, scattering experiments unambiguously show the formation of bigger and better defined ribbon-like crystallites, as well as the densification of the network they form. We propose a scenario for rationalizing the local T4T-HSs packing and the crystallites anisotropy at the mesoscale (1-10 nm) for HS fraction above 5%. Moreover, following in-situ the crystallization of TPEs with large HS fraction (20%), we highlight the presence of ``persistent aggregates'' present at T > T-m and study the ribbon-like crystallites growth mechanism during cooling from the melt state. (C) 2016 Elsevier Ltd. All rights reserved.

Published
2016
Full Text
View/download PDF

13. 4H-SiC VJFETs with Self-Aligned Contacts

Author

Zekentes, Konstantinos, Stavrinidis, Antonis, Konstantinidis, George, Kayambaki, Maria, Vamvoukakis, Konstantinos, Vassakis, Emmanouil, Vassilevski, Konstantin, Horsfall, Alton, Wright, Nick, Brosselard, Pierre, Niu, Shiqin, Lazar, Mihai, Planson, Dominique, Tournier, Dominique, Camara, Nicolas, Planson, Dominique, Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Microelectronics Research Group, IESL-FORTH, P.O. Box 1385, 71110, Heraklion, Greece, Newcastle University [Newcastle], School of Electrical and Electronic Engineering [Newcastle], Ampère, Département Energie Electrique (EE), Ampère (AMPERE), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-École Centrale de Lyon (ECL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) (GREMAN - UMR 7347), Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours-Centre National de la Recherche Scientifique (CNRS), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
static-induction, self-aligned contacts, [SPI.NRJ]Engineering Sciences [physics]/Electric power, voltage gain, Junction field effect transistors, [SPI.NRJ] Engineering Sciences [physics]/Electric power
Abstract

International audience; Trenched-implanted-gate 4H–SiC vertical-channel JFET (TI-VJFET) have been fabricated with self-aligned nickel silicide source and gate contacts using a process sequence that greatly reduces process complexity as it includes only four lithography steps. The effect of the channel geometry on the electrical characteristics has been studied by varying its length (0.3 and 1.2μm) and its width (1.5-5μm). The transistors exhibited high current handling capabilities (Direct Current density 330A/cm2). The output current reduces with the increase of the measurements temperature due to the decrease of the electron mobility value. The voltage breakdown exhibits a triode shape, which is typical for a static-induction transistor operation.

Published
2015

14. Ultra-smooth GaN membranes by photo-electrochemical etching for photonic applications

Author

Katerina Tsagaraki, F. G. Kalaitzakis, Maria Kayambaki, Rahul Jayaprakash, Eva Monroy, Nikos T. Pelekanos, Microelectronics Research Group, IESL-FORTH, P.O. Box 1385, 71110, Heraklion, Greece, Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Nanophysique et Semiconducteurs (NPSC), PHotonique, ELectronique et Ingénierie QuantiqueS (PHELIQS), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
010302 applied physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, Photoluminescence, Band gap, Mechanical Engineering, Nanotechnology, 02 engineering and technology, Electrolyte, Surface finish, 021001 nanoscience & nanotechnology, 01 natural sciences, Membrane, Mechanics of Materials, Etching (microfabrication), 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, General Materials Science, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 0210 nano-technology, Absorption (electromagnetic radiation), Quantum well
Abstract

International audience; Photo-electrochemical, bandgap selective, lateral etching is used to create 200 nm-thick, ultra-smooth GaN membranes, containing 10 pairs of GaN/AlGaN quantum wells. The use of electrolyte concentrations as low as 0.0004 M, along with appropriate excitation power and bias conditions, are shown to enhance the quality of freestanding membranes immensely, with an AFM roughness of 0.65 nm; the best ever reported value for GaN membranes fabricated using a similar technique. Transmission and photoluminescence experiments on these membranes were made possible at cryogenic temperatures by membrane transferring onto a double-side polished sapphire substrate, revealing pronounced excitonic features; the analysis of which strongly suggest that the absorption coefficients of GaN are at least 30 % higher than the values previously reported in the literature.

Published
2014
Full Text
View/download PDF

15. Tracking autoionizing-wavepacket dynamics at 1-femtosecond temporal scale

Author

Skantzakis, E., Tzallas, P., Kruse, J., Kalpouzos, C., Faucher, O., Tsakiris, G. D., Charalambidis, D., Institute of Electronic Structure and Laser ( FORTH-IESL ), Foundation for Research and Technology - Hellas ( FORTH ), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Max-Planck-Institut für Quantenoptik ( MPQ ), Max-Planck-Institut, University of Crete ( UOC ), European Project, Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Max-Planck-Institut für Quantenoptik (MPQ), Max-Planck-Gesellschaft, University of Crete [Heraklion] (UOC), and Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB)

Subjects
Xenon, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], [ PHYS.PHYS.PHYS-ATOM-PH ] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], 42.65.Re, 32.80.Ee, 32.80.Zb, 42.65.Ky, Physics::Atomic and Molecular Clusters, Auger decay, Fourier transform spectroscopy, HHG, Ultrafast dynamics, XUV spectroscopy, Higher order harmonic generation, Autoionizing states
Abstract

International audience; We present time resolved studies and Fourier-Transform-Spectroscopy of inner-shell excited states undergoing Auger decay and doubly excited autoionizing states, utilizing coherent extreme-ultraviolet (XUV) radiation continua. Series of states spanning a range of ~4eV are excited simultaneously. An XUV probe pulse tracks the oscillatory and decaying evolution of the formed wavepacket. The Fourier transform of the measured trace reproduces the spectrum of the series. The present work paves the way for ultra-broadband XUV spectroscopy and studies of ultra-fast dynamics in all states of matter.

Published
2010
Full Text
View/download PDF

16. Four-dimensional investigation of the 2nd order volume autocorrelation technique

Author

E. P. Benis, J. Kruse, C. Kalpouzos, A. Peralta Conde, Olivier Faucher, D. Charalambidis, Paraskevas Tzallas, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Institute of Electronic Structure and Laser ( FORTH-IESL ), Foundation for Research and Technology - Hellas ( FORTH ), University of Crete ( UOC ), European Community's Human Potential Program under contract MTKD-CT-2004-517145 (X-HOMES), the Ultraviolet Laser Facility (ULF) operating at FORTH-IESL (contract no. HPRI-CT-2001-00139), the ELI research infrastructure preparatory phase program and the FASTQUAST ITN Program of the 7th FP, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), and University of Crete [Heraklion] (UOC)

Subjects
Physics and Astronomy (miscellaneous), Autocorrelator, [ PHYS.PHYS.PHYS-ATOM-PH ] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], General Physics and Astronomy, 42.65.Ky, 42.65.Re, 32.80.Rm, 01 natural sciences, Displacement (vector), pulse caracterization, law.invention, 010309 optics, Optics, law, higher order harmonic generation, 0103 physical sciences, pulses, 010306 general physics, Ultrafast dynamics, Physics, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], business.industry, Oscillation, Optical autocorrelation, Autocorrelation technique, reflective interferometric autocorrelator, Autocorrelation, General Engineering, dynamics, VUV, Laser, Harmonic, XUX, HHG, business
Abstract

The 2nd order volume autocorrelation technique, widely utilized in directly measuring ultra-short light pulses durations, is examined in detail via model calculations that include three-dimensional integration over a large ionization volume, temporal delay and spatial displacement of the two beams of the autocorrelator at the focus. The effects of the inherent displacement to the 2nd order autocorrelation technique are demonstrated for short and long pulses, elucidating the appropriate implementation of the technique in tight focusing conditions. Based on the above investigations, a high accuracy 2nd order volume autocorrelation measurement of the duration of the 5th harmonic of a 50 fs long laser pulse, including the measurement of the carrier wavelength oscillation, is presented. Applied Physics B-Lasers and Optics

Published
2009
Full Text
View/download PDF

17. Realization of time-resolved two-vacuum-ultraviolet-photon ionization

Author

Olivier Faucher, E. P. Benis, J. Kruse, D. Charalambidis, A. Peralta Conde, P. Tzallas, Institute of Electronic Structure and Laser ( FORTH-IESL ), Foundation for Research and Technology - Hellas ( FORTH ), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), University of Crete ( UOC ), European Community's Human Potential Programme under contract MRTN-CT-2003-505138 (XTRA), MTKD-CT-2004-517145 (X-HOMES), Ultraviolet Laser Facility (ULF) operating at FORTH-IESL (contract no. HPRI-CT-2001-00139), ELI research infrastructure preparatoryphase program (contract GA no. 212105/SP4 capacities), FASQUAST program (contract GA no. 214962)., Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), and University of Crete [Heraklion] (UOC)

Subjects
spectroscopy, attosecond, Photon, [ PHYS.PHYS.PHYS-ATOM-PH ] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], Physics::Optics, photoionisation, nm, 01 natural sciences, 7. Clean energy, Atmospheric-pressure laser ionization, 010309 optics, Frequency conversion, Ionization, higher order harmonic generation, 0103 physical sciences, Physics::Atomic and Molecular Clusters, ethylene, molecules, two-photon processes, Physics::Chemical Physics, 010306 general physics, Ultrafast dynamics, Physics, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], photodissociation, dynamics, VUV, Atomic and Molecular Physics, and Optics, laser-pulses, Vacuum ultraviolet, Extreme ultraviolet, molecule-photon collisions, XUX, 32.80.Rm, 42.65.Re, 42.65.Ky, HHG, Atomic physics, ultrafast internal-conversion, organic compounds, physics, Realization (systems), oxygen
Abstract

International audience; Ultrafast dynamics of excited molecules is studied through time-resolved two-vacuum-ultraviolet (vuv)- photon ionization using a nonlinear volume autocorrelator unit. The two-vuv-photon process is induced by the intense fifth harmonic radiation of a femtosecond Ti:sapphire laser. In a proof-of-principle experiment, ultrafast dynamics of excited ethylene and oxygen molecules are investigated. Molecular decay times are deduced by comparing the experimental data with the results of a numerical model that accounts for the spatial and temporal characteristics of the harmonic field. The present experiments pave a convenient way for time domain investigations in the vuv-xuv spectral region in all states of matter at few femtosecond to subfemtosecond temporal scales.

Published
2009
Full Text
View/download PDF

18. Intense, table-top, sub-fs radiation sources. Current status and future perspectives

Author

Charalambidis , D., Tzallas , P., P. Benis , E., Peralta Conde , A., Skantzakis , E., Kruse , J., Nomura , Y., Hörlein , R., Rykovanov , S., Kalpouzos , C., Faucher , O., D. Tsakiris , G., Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), University of Crete [Heraklion] (UOC), Max-Planck-Institut für Quantenoptik (MPQ), Max-Planck-Gesellschaft, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institute of Electronic Structure and Laser ( FORTH-IESL ), Foundation for Research and Technology - Hellas ( FORTH ), University of Crete ( UOC ), Max-Planck-Institut für Quantenoptik ( MPQ ), Max-Planck-Institut, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), and Faucher, O.

Subjects
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], [ PHYS.PHYS.PHYS-ATOM-PH ] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], higher order harmonic generation, XUX, VUV, HHG, [PHYS.PHYS.PHYS-ATOM-PH] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], ComputingMilieux_MISCELLANEOUS
Abstract

Talk given by D. Charalambidis; International audience

Published
2008

19. A new compact laser source for portable LIBS applications

Author

Demetrios Anglos, V. Pinon, Anastasia Giakoumaki, Efstratios Georgiou, O. Musset, Jérôme Goujon, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Dept. of Electrical Engineering, Center of Materials Technology and Lasers, Technological Educational Institute of Crete, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Institute of Electronic Structure and Laser ( FORTH-IESL ), and Foundation for Research and Technology - Hellas ( FORTH )

Subjects
Solid state lasers, Materials science, Material analysis, Laser source, Instrumentation, ns range, 01 natural sciences, Signal, law.invention, 010309 optics, Optics, law, 0103 physical sciences, Laser-induced breakdown spectroscopy, Repeatability, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], Experimental study, business.industry, 010401 analytical chemistry, Laser, Q-switching, 0104 chemical sciences, Microcontroller, ISBN 978-0-8194-7046-1, 0-8194-7046-5, Pulsed lasers, business, YAG laser, Neodymium lasers
Abstract

International audience; We present LIBS experimental results that demonstrate the use of a newly compact, versatile pulsed laser source in material analysis in view of research aiming at the development of portable LIBS instrumentation. LIBS qualitative analyses were performed on various samples and objects, and spectra were recorded in gated and non-gated modes. The latter is important because of advantages arising from size and cost reduction when using simple, compact spectrograph-CCD detection systems over the standard ICCD-based configurations. The new Nd3+:YAG laser source exhibited very reliable performance in terms of laser pulse repeatability, autonomy and interface. Indeed, it can deliver a 45 mJ for 4.5 ns pulse and work at 1 Hz. Having the ability to work in double-pulse mode, it provided versatility in the measurements leading to increased LIBS signal intensities, improved the signal noise ratio and stabilized spectra. The first test results are encouraging and demonstrate that this new laser is suitable for integration in compact, portable and low cost LIBS sensors with a wide spectrum of materials analysis applications.

Published
2008
Full Text
View/download PDF

20. A new compact laser source for portable LIBS applications

Author

Goujon, Jérôme, Giakoumaki, A., Pinon, V., Musset, Olivier, Anglos, D., Georgiou, Efstratios, Boquillon, J.-P., Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Institute of Electronic Structure and Laser ( FORTH-IESL ), Foundation for Research and Technology - Hellas ( FORTH ), Dept. of Electrical Engineering, Center of Materials Technology and Lasers, Technological Educational Institute of Crete, Klein, Sandra, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institute of Electronic Structure and Laser (FORTH-IESL), and Foundation for Research and Technology - Hellas (FORTH)

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]
Abstract

International audience; We present LIBS experimental results that demonstrate the use of a newly compact, versatile pulsed laser source in material analysis in view of research aiming at the development of portable LIBS instrumentation. LIBS qualitative analyses were performed on various samples and objects, and spectra were recorded in gated and non-gated modes. The latter is important because of advantages arising from size and cost reduction when using simple, compact spectrograph-CCD detection systems over the standard ICCD-based configurations. The new Nd3+:YAG laser source exhibited very reliable performance in terms of laser pulse repeatability, autonomy and interface. Indeed, it can deliver a 45 mJ for 4.5 ns pulse and work at 1 Hz. Having the ability to work in double-pulse mode, it provided versatility in the measurements leading to increased LIBS signal intensities, improved the signal noise ratio and stabilized spectra. The first test results are encouraging and demonstrate that this new laser is suitable for integration in compact, portable and low cost LIBS sensors with a wide spectrum of materials analysis applications.

Published
2008

21. Laser-induced field-free alignment of OCS molecule

Author

Loriot , V., Tzallas , P., P. Benis , E., Hertz , E., Lavorel , B., Charalambidis , D., Faucher , O., Lavorel, Bruno, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Department of Physics [Heraklion], University of Crete [Heraklion] (UOC), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Institute of Electronic Structure and Laser ( FORTH-IESL ), Foundation for Research and Technology - Hellas ( FORTH ), Physics Department, and University of Crete ( UOC )

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], Physics::Optics, Physics::Atomic Physics
Abstract

International audience; We investigate the dynamical alignment of jet-cooled OCS molecules induced by a short laser pulse. The alignment is measured through the orientational contribution of the optical Kerr effect using a second weak laser pulse as a probe. Maximum alignment is observed at conditions close to saturation of ionization. The results are analysed with a quantum mechanical model solving for the rotational dynamics.

Published
2007

22. A new compact laser source for portable applications

Author

Goujon, Jérôme, Giakoumaki, A., Musset, Olivier, Anglos, D., Georgiou, Efstratios, Klein, Sandra, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Institute of Electronic Structure and Laser ( FORTH-IESL ), Foundation for Research and Technology - Hellas ( FORTH ), Dept. of Electrical Engineering, Center of Materials Technology and Lasers, Technological Educational Institute of Crete, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institute of Electronic Structure and Laser (FORTH-IESL), and Foundation for Research and Technology - Hellas (FORTH)

Subjects
ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2007

23. A non-human primate model of stroke reproducing endovascular thrombectomy and allowing long-term imaging and neurological read-outs

Author

F. Taborik, Karine Portier, Norbert Nighoghossian, Adrien Oudotte, Michaël Verset, Thomas Troalen, Omer Eker, Denis Vivien, Inés Mérida, Christelle Leon, Christian Tourvieille, Didier Le Bars, Emmanuelle Canet-Soulas, Michel Ovize, Hugues Contamin, Nicolas Costes, Nikolaos Makris, Véronique Agin, Joachim Confais, Tae-Hee Cho, Mohamed Aggour, Sophie Lancelot, Justine Debatisse, Jean-Baptiste Langlois, Océane Wateau, Marjorie Villien, Imagerie Tomographique et Radiothérapie, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etude et de Recherche Multimodal Et Pluridisciplinaire en imagerie du vivant (CERMEP - imagerie du vivant), Université de Lyon-Université de Lyon-CHU Grenoble-Hospices Civils de Lyon (HCL)-CHU Saint-Etienne-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS), Cynbiose, CYNBIOSE, Institut Claude Bourgelat (ICLB), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS), Cardiovasculaire, métabolisme, diabétologie et nutrition (CarMeN), Université de Lyon-Université de Lyon-Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Siemens Healthcare [France], Siemens AG [Munich], Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Radiopharmaceutical and Neurochemical Biomarkers Team (BioRaN), Centre de recherche en neurosciences de Lyon (CRNL), Université de Lyon-Université de Lyon-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Department of Cardiology, Hospices Civils de Lyon (HCL), Laboratoire de Chimie de la Matière Condensée de Paris (site ENSCP) (LCMCP (site ENSCP)), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), French Ministry of Higher Education and Research (ANRT), ANR-15-CE17-0020,CYCLOPS,CYCLOsporine A : effet neuroprotecteur dans un modèle Primate de Stroke en imagerie(2015), ANR-16-RHUS-0009,MARVELOUS,MARVELOUS(2016), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre de recherche en neurosciences de Lyon - Lyon Neuroscience Research Center (CRNL), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Male, [SDV]Life Sciences [q-bio], Executive Function, 0302 clinical medicine, Occlusion, Stroke, Thrombectomy, 0303 health sciences, Behavior, Animal, Endovascular Procedures, Infarction, Middle Cerebral Artery, Magnetic Resonance Imaging, 3. Good health, Treatment Outcome, Neurology, Blood-Brain Barrier, Motor Skills, Reperfusion Injury, Middle cerebral artery, Cardiology, medicine.symptom, Cardiology and Cardiovascular Medicine, medicine.medical_specialty, Ischemia, Context (language use), ischemia–reperfusion, Asymptomatic, Lesion, 03 medical and health sciences, medicine.artery, Internal medicine, medicine, Animals, cardiovascular diseases, Thrombus, Ischemic Stroke, 030304 developmental biology, business.industry, Original Articles, medicine.disease, Disease Models, Animal, Macaca fascicularis, Endovascular non-human primate stroke model, PET-MRI imaging, Positron-Emission Tomography, neurofunctional tests, Neurology (clinical), Tomography, X-Ray Computed, business, 030217 neurology & neurosurgery
Abstract

International audience; Stroke is a devastating disease. Endovascular mechanical thrombectomy is dramatically changing the management of acute ischemic stroke, raising new challenges regarding brain outcome and opening up new avenues for brain protection. In this context, relevant experiment models are required for testing new therapies and addressing important questions about infarct progression despite successful recanalization, reversibility of ischemic lesions, blood-brain barrier disruption and reperfusion damage. Here, we developed a minimally invasive non-human primate model of cerebral ischemia (Macaca fascicularis) based on an endovascular transient occlusion and recanalization of the middle cerebral artery (MCA). We evaluated per-occlusion and post-recanalization impairment on PET-MRI, in addition to acute and chronic neuro-functional assessment. Voxel-based analyses between per-occlusion PET-MRI and day-7 MRI showed two different patterns of lesion evolution: "symptomatic salvaged tissue" (SST) and "asymptomatic infarcted tissue" (AIT). Extended SST was present in all cases. AIT, remote from the area at risk, represented 45% of the final lesion. This model also expresses both worsening of fine motor skills and dysexecutive behavior over the chronic post-stroke period, a result in agreement with cortical-subcortical lesions. We thus fully characterized an original translational model of ischemia-reperfusion damage after stroke, with consistent ischemia time, and thrombus retrieval for effective recanalization.

Published
2020
Full Text
View/download PDF

24. Ultrafast nonlinear optical response of C60–polystyrene star polymers

Author

Patrick Seta, Y Ederle, Maria Konstantaki, Stelios Couris, C Mathis, Emmanuel Koudoumas, A. Mavromanolakis, Sydney Leach, Institute of Electronic Structure and Laser ( FORTH-IESL ), Foundation for Research and Technology - Hellas ( FORTH ), Laboratoire de Physique de l'Université de Bourgogne ( LPUB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Station de recherches porcines, Institut National de la Recherche Agronomique ( INRA ), Institut Européen des membranes ( IEM ), Centre National de la Recherche Scientifique ( CNRS ) -Ecole Nationale Supérieure de Chimie de Montpellier ( ENSCM ) -Université Montpellier 2 - Sciences et Techniques ( UM2 ) -Université de Montpellier ( UM ), Departement Atomes et Molécules en AstroPhysique ( DAMAP ), Observatoire de Paris, Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Laboratoire de Physique de l'Université de Bourgogne (LPUB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Agronomique (INRA), Institut Européen des membranes (IEM), Université de Montpellier (UM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS), Departement Atomes et Molécules en AstroPhysique (DAMAP), PSL Research University (PSL)-PSL Research University (PSL), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)

Subjects
Kerr effect, General Physics and Astronomy, Hyperpolarizability, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Molecular physics, [ CHIM ] Chemical Sciences, law.invention, chemistry.chemical_compound, Nonlinear optical, Optics, law, [CHIM]Chemical Sciences, Physical and Theoretical Chemistry, ComputingMilieux_MISCELLANEOUS, business.industry, Chemistry, 021001 nanoscience & nanotechnology, Laser, Toluene, 0104 chemical sciences, Polystyrene, 0210 nano-technology, business, Ultrashort pulse, Excitation
Abstract

The ultrafast nonlinear optical response of C 60 –polystyrene n -arm ( n =3,6) star polymers in toluene solution is studied using the optical Kerr effect technique under excitation with 800 nm, 100 fs laser pulses. Their response is found to depend on the number and the molecular weight of the arms and to be much larger than that of pure C 60 . Finally, the second hyperpolarizability of the C 60 –polystyrene n -arm star polymers is determined.

Published
2001
Full Text
View/download PDF

30. Non-polar GaN/AlGaN quantum-well polariton laser at room temperature

Author

E. A. Amargianitakis, A. Kostopoulos, E. Delamadeleine, Eva Monroy, Katerina Tsagaraki, Nikos T. Pelekanos, George Konstantinidis, Department of materials science and technology, University of Crete, Microelectronics Research Group, IESL-FORTH, P.O. Box 1385, 71110, Heraklion, Greece, Silicon Nanoelectronics Photonics and Structures (SiNaps), PHotonique, ELectronique et Ingénierie QuantiqueS (PHELIQS), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Nanophysique et Semiconducteurs (NPSC), and ANR-18-CE24-0014,UVLASE,Laser UV à pompage électronique(2018)

Subjects
Physics, Condensed Matter::Quantum Gases, [PHYS]Physics [physics], Condensed Matter::Other, Physics::Optics, 02 engineering and technology, Substrate (electronics), 021001 nanoscience & nanotechnology, Polarization (waves), 01 natural sciences, laser, GaN, Orientation (vector space), [SPI]Engineering Sciences [physics], Etching, 0103 physical sciences, ultraviolet, Polariton, polariton, Atomic physics, 010306 general physics, 0210 nano-technology, Lasing threshold, Quantum well, Line (formation)
Abstract

We demonstrate room temperature (RT) polariton lasing in an all-dielectric microcavity containing non-polar III-nitride quantum wells (QWs) as active media. The microcavity is fabricated using the photo-electrochemical etching method, by which an optimally grown $m$-plane III-nitride active region is detached from the substrate in the form of a membrane, which is subsequently inserted between two $\mathrm{Si}{\mathrm{O}}_{2}/{\mathrm{Ta}}_{2}{\mathrm{O}}_{5}$ distributed Bragg reflectors, with 4 and 10 pairs for the top and bottom mirrors, respectively. The active region consists of 25 $\mathrm{GaN}/{\mathrm{Al}}_{0.1}{\mathrm{Ga}}_{0.9}\mathrm{N}$ (5 nm/3 nm) QWs. The produced microcavities exhibit two closely spaced polarization-resolved lower polariton branches at RT, in line with the selection rules of the non-polar orientation, having a Rabi splitting of 62 and 72 meV in the $E\ensuremath{\parallel}a$ and $E\ensuremath{\parallel}c$ polarizations, respectively. In a positively detuned 3\ensuremath{\lambda}/2-thick microcavity, polariton lasing is observed at ambient conditions in the $E\ensuremath{\parallel}a$ polarization, with a threshold \ensuremath{\sim} 3 times lower than previous state of the art, despite the use of a relatively weak top reflector.

Published
2021
Full Text
View/download PDF

31. Probing Nanoparticle/Membrane Interactions by Combining Amphiphilic Diblock Copolymer Assembly and Plasmonics

Author

Tristan Bereau, Markus Deserno, Hans-Juergen Butt, George Fytas, Katharina Landfester, Gaëtan Lévêque, Amelie H. R. Koch, Svenja Morsbach, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Physique-IEMN (PHYSIQUE-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Machine Learning Department [Carnegie Mellon Univ.], Carnegie Mellon University [Pittsburgh] (CMU), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), ERC AdG SmartPhon [694977], NSFNational Science Foundation (NSF) [CHE 1764257], Max Planck Institute for Polymer Research, Max-Planck-Gesellschaft, Physique - IEMN (PHYSIQUE - IEMN), and Computational Science Lab (IVI, FNWI)

Subjects
Materials science, Polymers, Nanoparticle, Metal Nanoparticles, Nanotechnology, 010402 general chemistry, 01 natural sciences, Article, Citric Acid, Polyethylene Glycols, [SPI]Engineering Sciences [physics], Dynamic light scattering, 0103 physical sciences, Oxazines, Materials Chemistry, Surface charge, Dimethylpolysiloxanes, Physical and Theoretical Chemistry, Surface plasmon resonance, 010304 chemical physics, Vesicle, Adhesion, Surface Plasmon Resonance, 0104 chemical sciences, Surfaces, Coatings and Films, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Membrane, [CHIM.POLY]Chemical Sciences/Polymers, Polymersome, Liposomes, Gold
Abstract

International audience; Understanding the interactions between nanoparticles (NPs) and boundaries of cells is crucial both for their toxicity and therapeutic applications. Besides specific receptor-mediated endocytosis of surface-functionalized NPs, passive internalization is prompted by relatively unspecific parameters, such as particle size and charge. Based on theoretical treatments, adhesion to and bending of the cell membrane can induce NP wrapping. Experimentally, powerful tools are needed to selectively probe possible membrane-NP motifs at very dilute conditions and avoid dye labeling. In this work, we employ surface resonance-enhanced dynamic light scattering, surface plasmon resonance, electron microscopy, and simulations for sensing interactions between plasmonic AuNPs and polymersomes. We distinguish three different interaction scenarios at nanomolar concentrations by tuning the surface charge of AuNPs and rationalize these events by balancing vesicle bending and electrostatic/van der Waals AuNP and vesicle adhesion. The clarification of the physical conditions under which nanoparticles passively translocate across membranes can aid in the rational design of drugs that cannot exploit specific modes of cellular uptake and also elucidates physical properties that render nanoparticles in the environment particularly toxic.

Published
2020
Full Text
View/download PDF

32. Force–displacement relationship in micro-metric pantographs: Experiments and numerical simulations

Author

Francesco dell’Isola, Costas P. Grigoropoulos, Maria Farsari, Vasileia Melissinaki, Emilio Turco, Anil Misra, Zacharias Vangelatos, Dipartimento di Ingegneria Strutturale e Geotecnica [Rome], Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Dipartimento di Architettura, Design e Urbanistica, Università degli Studi di Sassari, Department of Civil, Environmental & Architectural Engineering, University of Kansas [Lawrence] (KU), Department of Mechanical Engineering [Berkeley], University of California [Berkeley], University of California-University of California, Institute of Electronic Structure and Laser (FORTH-IESL), and Foundation for Research and Technology - Hellas (FORTH)

Subjects
Marketing, Micro-and mini-pantographic lattices, Scale (ratio), Computer science, Strategy and Management, Lagrangian models, Micro- and mini-pantographic lattices, Nonlinear analysis, Mechanical engineering, [PHYS.MECA]Physics [physics]/Mechanics [physics], 02 engineering and technology, Type (model theory), Microstructure, Range (mathematics), 020303 mechanical engineering & transports, 0203 mechanical engineering, Metric (mathematics), Media Technology, Pantograph, General Materials Science, Force displacement
Abstract

International audience; In this paper, we reveal that the mathematical discrete model of Hencky type, introduced in [1], is appropriate for describing the mechanical behavior of micro-metric pantographic elementary modules. This behavior does not differ remarkably from what has been observed for milli-metric modules, as we prove with suitably designed experiments. Therefore, we conclude that the concept of pantographic microstructure seems feasible for micro-metrically architected microstructured (meta)materials as well. These results are particularly indicative of the possibility of fabricating materials that can have an underlying pantographic microstructure at micrometric scale, so that its unique behavior can be exploited in a larger range of technological applications.

Published
2019
Full Text
View/download PDF

33. Effect of metal doped and co-doped TiO2 photocatalysts oriented to degrade indoor/outdoor pollutants for air quality improvement. A kinetic and product study using acetaldehyde as probe molecule

Author

Vassilios Binas, Manolis N. Romanias, Apostolos Zachopoulos, Emmanouil S. Karafas, Panos Papagiannakopoulos, Vassileios G. Stefanopoulos, George Kiriakidis, Department of Chemistry [Heraklion], University of Crete [Heraklion] (UOC), Centre for Energy and Environment (CERI EE), Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institut Mines-Télécom [Paris] (IMT), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), and Center for Quantum Complexity & Nanotechnology (CCQCN), Department of Physics, University of Crete

Subjects
Chemistry, General Chemical Engineering, Kinetics, General Physics and Astronomy, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, medicine.disease_cause, Photochemistry, 01 natural sciences, 7. Clean energy, Decomposition, 0104 chemical sciences, Transition metal, 13. Climate action, [SDE]Environmental Sciences, Photocatalysis, medicine, Irradiation, 0210 nano-technology, Photodegradation, ComputingMilieux_MISCELLANEOUS, Ultraviolet, Visible spectrum
Abstract

This study demonstrates the photocatalytic decomposition of an indoor air pollutant, acetaldehyde (CH3CHO), over 0.04 mol% metal-doped TiO2 (Mn-, Co- and Mn/Co-) nanoparticles activated by ultraviolet and visible irradiation. The photocatalytic activity, the photodegradation kinetics, and the final product analysis were examined using a Static Photochemical Reactor coupled with a FTIR spectrophotometer. CH3CHO undergoes efficient decomposition over all photocatalysts under UV irradiation in the presence of one atmosphere N2 or synthetic air (SA). Metal doping causes substantial influence to photocatalysis by altering the amount of electron/hole pairs generated and/or the electron/hole recombination rates. Simulating the experimental results with pseudo-first order kinetics the corresponding degradation rate coefficients were determined for each photocatalyst under UV irradiation and SA environment: kdUV(Mn-TiO2) = (1.9 ± 0.2)×10−1 h−1, kdUV(Co-TiO2) = (2.8 ± 0.3)×10−1 h−1, and kdUV(Mn/Co-TiO2) = (6.0 ± 0.7)×10−1 h−1. These degradation kinetics under UV light irradiation are significantly faster than undoped TiO2 revealing that the transition metal doping of TiO2 nanomaterials boosts the photocatalytic degradation of organic pollutants. Substantial decomposition of CH3CHO was achieved over Mn-TiO2 under visible light in oxygen presence kdVis(SA) = (0.44 ± 0.04)×10−1 h−1 while for other samples no visible light photocatalysis was observed. CO2, CO, and H2O were the main oxidation products, with CO2 yields almost 100% under UV excitation, and CO yields up to 20% under UV and

Published
2019
Full Text
View/download PDF

35. The evaluation of the advanced control room

Author

Terashita, Naotaka [Industrial Electronics and Systems Laboratory, IESL, Mitsubishi Electric Corp., 1-1 Tsukaguchi-Honmachi 8-chome, Amagasaki, Hyogo, 661-8661 (Japan)]

Published
2002

36. Femtosecond Broadband Frequency Switch of Terahertz Three-Dimensional Meta-Atoms

Author

Kenneth Maussang, Stelios Tzortzakis, P. Goulain, Joshua R. Freeman, Edmund H. Linfield, Raffaele Colombelli, Bruno Paulillo, Jean-Michel Manceau, Anastasios D. Koulouklidis, Lianhe Li, Sukhdeep Dhillon, Christina Daskalaki, Centre de Nanosciences et de Nanotechnologies (C2N), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), ICFO – The Institute of Photonic Sciences (ICFO – The Institute of Photonic Sciences), Laboratoire de physique de l'ENS - ENS Paris (LPENS), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Nano-THz, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), School of Electronic and Electrical Engineering, University of Leeds (University of Leeds), Laboratoire de physique de l'ENS - ENS Paris (LPENS (UMR_8023)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris)

Subjects
Materials science, Field (physics), Terahertz radiation, 02 engineering and technology, 01 natural sciences, Gallium arsenide, 010309 optics, chemistry.chemical_compound, 0103 physical sciences, Broadband, Electrical and Electronic Engineering, ComputingMilieux_MISCELLANEOUS, [PHYS]Physics [physics], Range (particle radiation), business.industry, Resonance, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, chemistry, Femtosecond, Optoelectronics, 0210 nano-technology, business, Ultrashort pulse, Biotechnology
Abstract

We present the experimental demonstration of a subpicosecond all-optical THz switch based on three-dimensional (3D) terahertz meta-atoms. Combining a special design of 3D meta-devices and the ultrafast dynamics of low temperature grown gallium arsenide, we can modulate the reflectance of the THz microcavities within 2.2 ps. The device enables a 280 GHz switch in resonance frequency within less than 200 fs. The switch back to the original resonance takes 800 fs. Experimental results show that the speed values are strongly convoluted by the THz probing field and, thus, the real switching times are even shorter, in the few 100 fs range.

Published
2021
Full Text
View/download PDF

37. Control of Light Transmission in a Plasmonic Liquid Metacrystal

Author

Alain Celzard, Vanessa Fierro, George Kenanakis, Alexander A. Zharov, Zacharias Viskadourakis, Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institute for Physics of Microstructures of the RAS, Russian Academy of Sciences [Moscow] (RAS), Institute of Electronic Structure and Laser (FORTH-IESL), and Foundation for Research and Technology - Hellas (FORTH)

Subjects
Light transmission, Materials science, General Chemical Engineering, Physics::Optics, 02 engineering and technology, liquid metacrystals, 01 natural sciences, Electromagnetic radiation, Article, [SPI.MAT]Engineering Sciences [physics]/Materials, 010309 optics, lcsh:Chemistry, liquid metamaterials, Electric field, 0103 physical sciences, General Materials Science, Anisotropy, Plasmon, ComputingMilieux_MISCELLANEOUS, [PHYS]Physics [physics], business.industry, 021001 nanoscience & nanotechnology, Polarization (waves), Transmission (telecommunications), lcsh:QD1-999, Slab, Optoelectronics, 0210 nano-technology, business, plasmonic metamaterials
Abstract

In this study, we experimentally demonstrated the control of light transmission through a slab of plasmonic liquid metacrystal by an external electric field. By applying the external static field, we were able to induce macroscopic anisotropy, which caused the polarization-dependent suppression of transmission at resonant frequencies. Such behavior indicates the selective plasmon excitation governed by the orientation of the meta-atoms with respect to the polarization of the electromagnetic wave. The problem of light transmission through a plasmonic liquid metacrystal was analyzed theoretically from first principles, and the obtained results were compared with the experimental data.

Published
2021
Full Text
View/download PDF

42. Quantum technologies in space

Author

Rainer Kaltenbaek, Laszlo Bacsardi, Eleni Diamanti, Mathias van den Bossche, Antonio Acín, Paolo Bianco, Ernst M. Rasel, Valerio Pruneri, Philippe Bouyer, Paolo Villoresi, Angelo Bassi, Hugo Zbinden, Bernhard Sang, Wolf von Klitzing, Christoph Marquardt, Hendrik Ulbricht, Rupert Ursin, Yasser Omar, Stephan Seidel, Mauro Paternostro, University of Ljubljana, Institute for Quantum Optics and Quantum Information [Innsbruck] (IQOQI), Austrian Academy of Sciences (OeAW), Institut de Ciencies Fotoniques [Castelldefels] (ICFO), Institució Catalana de Recerca i Estudis Avançats (ICREA), Budapest University of Technology and Economics [Budapest] (BME), Airbus Defence and Space, Airbus Group, Laboratoire Photonique, Numérique et Nanosciences (LP2N), Université de Bordeaux (UB)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Information Quantique [LIP6] (QI), LIP6, Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Max Planck Institute for the Science of Light, Max-Planck-Gesellschaft, Universidade de Lisboa (ULISBOA), Instituto de Telecomunicações [Lisboa, Portugal], Institut für Quantenoptik [Hannover] (IQ), Leibniz Universität Hannover [Hannover] (LUH), OHB Systems AG, University of Southampton, Universitad de Padua, Thales Alenia Space, Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Geneva Observatory, University of Geneva [Switzerland], Queen's University [Belfast] (QUB), University of Trieste, Kaltenbaek, Rainer, Acin, Antonio, Bacsardi, Laszlo, Bianco, Paolo, Bouyer, Philippe, Diamanti, Eleni, Marquardt, Christoph, Omar, Yasser, Pruneri, Valerio, Rasel, Ernst, Sang, Bernhard, Seidel, Stephan, Ulbricht, Hendrik, Ursin, Rupert, Villoresi, Paolo, van den Bossche, Mathia, von Klitzing, Wolf, Zbinden, Hugo, Paternostro, Mauro, and Bassi, Angelo

Subjects
Digital era, Atomic Physics (physics.atom-ph), media_common.quotation_subject, FOS: Physical sciences, ddc:500.2, Applied Physics (physics.app-ph), Space (commercial competition), 01 natural sciences, 7. Clean energy, Commercialization, Physics - Atomic Physics, Quantum technology, Competition (economics), Entanglement, symbols.namesake, State (polity), Secure communication, Physics - Space Physics, [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], 0103 physical sciences, Fundamental tests, Galileo (satellite navigation), Quantum communication, 010306 general physics, 010303 astronomy & astrophysics, media_common, Fundamental test, Quantum Physics, business.industry, Quantum sensing, Astronomy and Astrophysics, Physics - Applied Physics, Space Physics (physics.space-ph), Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie, 13. Climate action, Space and Planetary Science, symbols, ddc:520, Space Communication, Original Article, Telecommunications, business, Quantum Physics (quant-ph)
Abstract

Recently, the European Commission supported by many European countries has announced large investments towards the commercialization of quantum technology (QT) to address and mitigate some of the biggest challenges facing today's digital era - e.g. secure communication and computing power. For more than two decades the QT community has been working on the development of QTs, which promise landmark breakthroughs leading to commercialization in various areas. The ambitious goals of the QT community and expectations of EU authorities cannot be met solely by individual initiatives of single countries, and therefore, require a combined European effort of large and unprecedented dimensions comparable only to the Galileo or Copernicus programs. Strong international competition calls for a coordinated European effort towards the development of QT in and for space, including research and development of technology in the areas of communication and sensing. Here, we aim at summarizing the state of the art in the development of quantum technologies which have an impact in the field of space applications. Our goal is to outline a complete framework for the design, development, implementation, and exploitation of quantum technology in space., 13 pages, 1 figure

Published
2021
Full Text
View/download PDF

43. Biohybrid plants with electronic roots via in vivo polymerization of conjugated oligomers

Author

Georges Hadziioannou, Daniela Parker, Eleni Stavrinidou, Magnus Berggren, Eleni Pavlopoulou, Eduardo Solano, Yohann Daguerre, Torgny Näsholm, Gwennaël Dufil, Daniele Mantione, Eric Cloutet, Laboratory of Organic Electronics, Linköping University (LIU), Umeå University, Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies, Laboratoire de Chimie des Polymères Organiques (LCPO), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), ALBA Synchrotron light source [Barcelone], Institute of Electronic Structure and Laser (FORTH-IESL), and Foundation for Research and Technology - Hellas (FORTH)

Subjects
electronic plant, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Energy storage, Cutting, Teoretisk kemi, General Materials Science, Electronics, Electrical and Electronic Engineering, [SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biochemistry [q-bio.BM], Theoretical Chemistry, conducting polymers, Vascular tissue, 2. Zero hunger, chemistry.chemical_classification, Conductive polymer, energy storage, Process Chemistry and Technology, Polymer, [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics, 021001 nanoscience & nanotechnology, Bio Materials, 6. Clean water, 0104 chemical sciences, Biocatalysis and Enzyme Technology, chemistry, Polymerization, Mechanics of Materials, Surface modification, mixed ionic-electronic conductors, 0210 nano-technology, biohybrid
Abstract

Plant processes, ranging from photosynthesis through production of biomaterials to environmental sensing and adaptation, can be used in technology via integration of functional materials and devices. Previously, plants with integrated organic electronic devices and circuits distributed in their vascular tissue and organs have been demonstrated. To circumvent biological barriers, and thereby access the internal tissue, plant cuttings were used, which resulted in biohybrids with limited lifetime and use. Here, we report intact plants with electronic functionality that continue to grow and develop enabling plant-biohybrid systems that fully maintain their biological processes. The biocatalytic machinery of the plant cell wall was leveraged to seamlessly integrate conductors with mixed ionic-electronic conductivity along the root system of the plants. Cell wall peroxidases catalyzed ETE-S polymerization while the plant tissue served as the template, organizing the polymer in a favorable manner. The conductivity of the resulting p(ETE-S) roots reached the order of 10 S cm(-1) and remained stable over the course of 4 weeks while the roots continued to grow. The p(ETE-S) roots were used to build supercapacitors that outperform previous plant-biohybrid charge storage demonstrations. Plants were not affected by the electronic functionalization but adapted to this new hybrid state by developing a more complex root system. Biohybrid plants with electronic roots pave the way for autonomous systems with potential applications in energy, sensing and robotics. Funding Agencies|European UnionEuropean Commission [800926, 838171]; Swedish Research CouncilSwedish Research CouncilEuropean Commission [VR-2017-04910]; Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation; Wallenberg Wood Science Center [KAW 2018.0452]; Swedish Government Strategic Research Area in Materials Science on Advanced Functional Materials at Linkoping University [2009-00971]; European Research Council (ERC)European Research Council (ERC)European Commission [834677]

Published
2021
Full Text
View/download PDF

45. Harnessing polymer grafting to control the shape of plasmonic nanoparticles

Author

Gaëtan Lévêque, George Fytas, Ying Zhou, Manos Gkikas, Tanmoy Maji, Liting Yan, Shanxi University, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Physique-IEMN (PHYSIQUE-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Max Planck Institute for Polymer Research, Max-Planck-Gesellschaft, Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), Physique - IEMN (PHYSIQUE - IEMN), and ERC AdG SmartPhon No. 694977, European Research Council

Subjects
010302 applied physics, chemistry.chemical_classification, Plasmonic nanoparticles, Materials science, Polymer nanocomposite, General Physics and Astronomy, Nanoparticle, 02 engineering and technology, Polymer, 021001 nanoscience & nanotechnology, 01 natural sciences, [SPI]Engineering Sciences [physics], chemistry, Chemical engineering, Dynamic light scattering, 0103 physical sciences, Particle, Surface plasmon resonance, 0210 nano-technology, Plasmon
Abstract

International audience; Matrix-free polymer grafted nanoparticles (NPs) are single component polymer nanocomposites (PNCs) for which the often reported severe aggregation of the conventional PNCs can be suppressed. For a given particle core, the size and shape of the polymer grafted nanoparticles can be controlled by the molecular weight of the polymer and its grafting density. However, the degree of homogeneity of one-component PNCs depends on the grafted chain molecular weight and grafting density, as well as on the shape of grafted NPs. Surface plasmon resonance enhanced dynamic light scattering from very dilute solutions, yielding both translational and rotational transport coefficients, complemented by UV-Vis extinction spectra, can detect deviations from spheres. Here, we report that poly(isobutylene)-grafted Ag NPs strongly deviate from the spherical shape and are modeled as prolate spheroids. This NP asphericity, due to inhomogeneous grafting, can impact the structure and properties of plasmonic PNCs in the solid state. Thus, characterizing this behavior is a crucial step prior to the formation of one-component PNCs.

Published
2020
Full Text
View/download PDF

47. A Continuous Semi-Empirical VJFET Capacitance Model from Sub to above Threshold Regime

Author

Maria Kayambaki, Nikolaos Makris, Konstantinos Zekentes, George Konstantinidis, Antonis Stavrinidis, Microelectronics Research Group, IESL-FORTH, P.O. Box 1385, 71110, Heraklion, Greece, Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation (IMEP-LAHC ), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
010302 applied physics, Materials science, business.industry, Mechanical Engineering, 020208 electrical & electronic engineering, Capacitance, 02 engineering and technology, Condensed Matter Physics, 01 natural sciences, Compact Model, [SPI]Engineering Sciences [physics], Mechanics of Materials, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Optoelectronics, Trenched-Singly-Implanted Vertical Junction Field Effect Transistors, General Materials Science, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, business
Abstract

This paper presents and discusses the depletion mechanisms that dominate in a TSI-VJFET under different bias conditions as expressed by the gate-source (CGS) and gate-drain (CGD) capacitances. It is shown that at pinch off the dominant capacitance is the drift capacitance and that in conduction the drain source voltage plays a significant role in channel’s formation. Furthermore a semi empirical capacitance model is introduced. CGSand CGDare modeled below and above threshold voltage by considering parallel plate capacitors with different plate configuration in te two cases. Then, the derived expressions are unified using a transition function that preserves the continuity of the model. The model was adjusted and fitted adequately to measured CV data from fabricated TSI-VJFET.

Published
2018
Full Text
View/download PDF

48. Cross-Section Doping Topography of 4H-SiC VJFETs by Various Techniques

Author

Konstantinos Vamvoukakis, Marianthi Panagopoulou, Maher Nafouti, George Konstantinidis, Antonis Stavrinidis, Daniel Alquier, Konstantinos Zekentes, Maria Kayambaki, Nikolaos Makris, Katerina Tsagaraki, Hervé Peyre, Institute for Electronic Structure and Laser (IESL), Foundation for Research and Technology - Hellas (FORTH), GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) (GREMAN - UMR 7347), Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Charles Coulomb (L2C), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, 02 engineering and technology, TSI-VJFET, Epitaxy, 01 natural sciences, Cross section (physics), chemistry.chemical_compound, 0103 physical sciences, Silicon carbide, General Materials Science, SSRM, 010302 applied physics, Silicon Carbide, business.industry, Mechanical Engineering, Doping, 021001 nanoscience & nanotechnology, Condensed Matter Physics, [SPI.TRON]Engineering Sciences [physics]/Electronics, SCM, chemistry, Mechanics of Materials, SEM, Optoelectronics, Field-effect transistor, 0210 nano-technology, business, SIMS
Abstract

International audience; Different methods for cross-section doping topography of SiC Trenched-singly-implanted vertical junction field effect transistors (TSI-VJFETs) are presented with the purpose to determine the doping distribution in the epitaxial structure and the implanted areas.

Published
2018
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results