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1. Dynamic inking of large-scale stamps for multiplexed microcontact printing and fabrication of cell microarrays.

Author

Julie Foncy, Aurore Estève, Amélie Degache, Camille Colin, Xavier Dollat, Jean-Christophe Cau, Christophe Vieu, Emmanuelle Trévisiol, and Laurent Malaquin

Subjects
Medicine, Science
Abstract

Microcontact printing has become a versatile soft lithography technique used to produce molecular micro- and nano-patterns consisting of a large range of different biomolecules. Despite intensive research over the last decade and numerous applications in the fields of biosensors, microarrays and biomedical applications, the large-scale implementation of microcontact printing is still an issue. It is hindered by the stamp-inking step that is critical to ensure a reproducible and uniform transfer of inked molecules over large areas. This is particularly important when addressing application such as cell microarray manufacturing, which are currently used for a wide range of analytical and pharmaceutical applications. In this paper, we present a large-scale and multiplexed microcontact printing process of extracellular matrix proteins for the fabrication of cell microarrays. We have developed a microfluidic inking approach combined with a magnetic clamping technology that can be adapted to most standard substrates used in biology. We have demonstrated a significant improvement of homogeneity of printed protein patterns on surfaces larger than 1 cm2 through the control of both the flow rate and the wetting mechanism of the stamp surface during microfluidic inking. Thanks to the reproducibility and integration capabilities provided by microfluidics, we have achieved the printing of three different adhesion proteins in one-step transfer. Selective cell adhesion and cell shape adaptation on the produced patterns were observed, showing the suitability of this approach for producing on-demand large-scale cell microarrays.

Published
2018
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3. Rackham: An Interactive Robot-Guide.

Author

Aurélie Clodic, Sara Fleury, Rachid Alami, Raja Chatila 0001, Gérard Bailly, Ludovic Brethes, Maxime Cottret, Patrick Danès, Xavier Dollat, Frédéric Elisei, Isabelle Ferrané, Matthieu Herrb, Guillaume Infantes, Christian Lemaire, Frédéric Lerasle, Jérôme Manhes, Patrick Marcoul, Paulo Menezes 0001, and Vincent Montreuil

Published
2006
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6. Effect of Process Parameters on the Properties of Direct Written gas-generating Reactive Layers

Author

Fabien Mesnilgrente, Bernard Franc, Sandrine Assié-Souleille, Xuwen Liu, Tao Wu, Florent Sevely, Xavier Dollat, Carole Rossi, Équipe Nano-ingénierie et intégration des oxydes métalliques et de leurs interfaces (LAAS-NEO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Nanjing University of Science and Technology (NJUST), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Service Instrumentation Conception Caractérisation (LAAS-I2C), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Université de Toulouse (UT)

Subjects
energetic materials, Materials science, Polymers and Plastics, gas generation, 02 engineering and technology, 01 natural sciences, direct writing, law.invention, reactive material, [SPI]Engineering Sciences [physics], law, 0103 physical sciences, Reactivity (chemistry), chemistry.chemical_classification, Copper complex, 010304 chemical physics, thermite, Process Chemistry and Technology, Organic Chemistry, Gas release, Thermite, Polymer, 3D printing, 021001 nanoscience & nanotechnology, Pressure measurement, chemistry, Chemical engineering, 0210 nano-technology, Mass fraction, Reactive material
Abstract

International audience; A mixture of copper complex and Al/CuO nanothermite, Al/CuO/CuC, represents one of the state-of-the-art gas-generating thermite systems with various pyrotechnic applications due to its tunable gas release rates. The reactivity of reactive inks with various loadings of the poly(vinylpyrrolidone) (PVP) binder mixed with Al/CuO/CuC is characterized using high-speed imaging diagnostics and pressure measurements. For a PVP mass fraction of

Published
2021
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7. Lateral Porous Silicon Interferometric Transducer for Sensing Applications

Author

Adrian Laborde, Thierry Leichle, Yingning He, Xavier Dollat, Ludovic Salvagnac, Douglas Silva de Vasconcellos, David Bourrier, Eric Imbernon, Véronique Bardinal, Équipe Microsystèmes électromécaniques (LAAS-MEMS), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Équipe MICrosystèmes d'Analyse (LAAS-MICA), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Service Instrumentation Conception Caractérisation (LAAS-I2C), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), and ANR-17-CE09-0024,LabPSi,Membranes de silicium poreux latérales comme solution générique de préparation d'échantillon et biodétection pour les laboratoires sur puce(2017)

Subjects
Microscope, Materials science, business.industry, 010401 analytical chemistry, 02 engineering and technology, 021001 nanoscience & nanotechnology, Porous silicon, 01 natural sciences, Signal, 0104 chemical sciences, law.invention, Interferometry, [SPI]Engineering Sciences [physics], Transducer, Interference (communication), law, Optoelectronics, 0210 nano-technology, business, Biosensor, Refractive index
Abstract

International audience; In this work, we demonstrate the transducing ability of lateral porous silicon membranes (LPSi) using optical interferometry. To this aim, we carry out Fourier-transform infrared spectroscopy measurements using a microscope equipped with an appropriate objective in order to overcome the difficulty to obtain interference signal from LPSi membranes with small dimensions. Reflectance spectra are recorded while filling the membrane with various solvents and their analysis provide estimations of the effective optical thicknesses and the resulting index of refraction of the fillers in the NIR range. The results show that the various solvents can appropriately be identified and discriminated through the derived refractive indices, thus providing a proof-of-concept of the LPSi interferometric transducer.

Published
2018
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8. Easy alignment strategy for multi-level micropatterning

Author

Xavier Dollat, Laura Lin, Aline Cerf, Aurore Estève, David M. Lin, Équipe Ingénierie pour les sciences du vivant (LAAS-ELIA), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Service Instrumentation Conception Caractérisation (LAAS-I2C), Cornell University [New York], Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Université de Toulouse (UT)

Subjects
Fabrication, Computer science, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Multiplexing, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, [SPI]Engineering Sciences [physics], Neurite extension, Electrical and Electronic Engineering, 0210 nano-technology, Micropatterning
Abstract

International audience; In recent years, there has been a strong demand in the biological community for multiplexed protein patterns for the control and study of cellular growth at subcellular and cellular length scales. Here, an easy alignment strategy for multi-level micropatterning is proposed enabling the broadening of patterning possibilities and the increase of architecturing complexity. In practice, our method consists of a set of custom-made machined holders for standardized fabrication of polymeric stamps and for controlled alignment of successive printing steps. With this approach, three interdigitated protein patterns of 5 μm width were successfully obtained with an angular alignment precision below 0.55° and a lateral alignment accuracy of less than 35 μm over areas of 1 cm2. After growth of primary neurons onto these multiplexed substrates, guided neurite extension was observed along the patterns.

Published
2018
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9. Autonomous power supply for aeronautical health monitoring sensors

Author

Vincent Boitier, Xavier Dollat, Marise Bafleur, Jean-Marie Dilhac, S Jugé, J Féau, D Bramban, Équipe Énergie et Systèmes Embarqués (LAAS-ESE), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Airbus [France], Service Instrumentation Conception Caractérisation (LAAS-I2C), ALTRAN TECHNOLOGIES S.A., ALTRAN (FRANCE), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées

Subjects
010302 applied physics, History, business.industry, Computer science, [SPI.NRJ]Engineering Sciences [physics]/Electric power, Context (language use), 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, 7. Clean energy, Computer Science Applications, Education, Power (physics), [SPI.TRON]Engineering Sciences [physics]/Electronics, Thermoelectric generator, Local system, 0103 physical sciences, Systems engineering, Key (cryptography), Wireless, Electronics, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 0210 nano-technology, business, Energy (signal processing)
Abstract

International audience; New applications of embedded systems are envisioned in the context of aeronautics. However, the increasing burden of on-board cabling requires wireless solutions. Moreover, concerns such as safety or system lifetime often preclude the use of electrochemical energy storage. Ambient energy capture, storage and management are therefore key topics. In this paper we illustrate these concepts by describing an actual implementation in the engine harsh environment of an Airbus A380. A thermogenerator was used to harvest ambient energy and the electronics associated with it allows the local system being energy autonomous. All items were devised and tested in order to meet the criteria of DO-160G aeronautical standard. The set of equipment was mounted on aircraft, and submitted to tens of test flights during roughly a year, in very various flight conditions.

Published
2017

10. Réalisation d'un filtre étroit dans l'infrarouge thermique en technologie nanophotonique. Rapport final

Author

Ksenia Sharshavina, Philippe Arguel, Pierre-François Calmon, Franck Carcenac, Emmanuelle Daran, Xavier Dollat, Jean-Baptiste Doucet, Pascal Dubreuil, Olivier Gauthier-Lafaye, Aurélie Lecestre, Amandine Lestras, Laurent Mazenq, Antoine Monmayrant, Sylvain Pelloquin, Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Service Instrumentation Conception Caractérisation (LAAS-I2C), CNES, 18 avenue Edouard Belin 31401 Toulouse, Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées

Subjects
[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract

National audience

Published
2017

11. A MEMS approach to determine the biochemical oxygen demand (BOD) of wastewaters

Author

A. Boukabache, Anne-Marie Gué, Xavier Dollat, Gérald Thouand, A Migaou, Loic Recoules, Traitement Eau Air Métrologie (GEPEA-TEAM), Laboratoire de génie des procédés - environnement - agroalimentaire (GEPEA), Institut Universitaire de Technologie - Nantes (IUT Nantes), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut Universitaire de Technologie Saint-Nazaire (IUT Saint-Nazaire), Université de Nantes (UN)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Universitaire de Technologie - La Roche-sur-Yon (IUT La Roche-sur-Yon), Université de Nantes (UN)-Institut Universitaire de Technologie - Nantes (IUT Nantes), Université de Nantes (UN), Équipe Micro-Nanofluidique pour les sciences de la vie et de l’environnement (LAAS-MILE), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UPS), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse 1 Capitole (UT1)-Université Toulouse - Jean Jaurès (UT2J)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse 1 Capitole (UT1)-Université Toulouse - Jean Jaurès (UT2J), Service Instrumentation Conception Caractérisation (LAAS-I2C), and Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Biochemical oxygen demand, Microfluidics, 02 engineering and technology, 01 natural sciences, Microsystem, Fluidics, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Electrical and Electronic Engineering, Process engineering, ComputingMilieux_MISCELLANEOUS, Microelectromechanical systems, Pollutant, business.industry, [SDE.IE]Environmental Sciences/Environmental Engineering, Mechanical Engineering, 010401 analytical chemistry, 021001 nanoscience & nanotechnology, 6. Clean water, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Mechanics of Materials, Environmental science, Limiting oxygen concentration, Optode, 0210 nano-technology, business
Abstract

International audience; A MEMS approach to obtain an efficient tool for the evaluation of the biochemical oxygen demand (BOD) of wastewaters is introduced. Its operating principle is based on the measurement of oxygen concentration in water samples containing organic pollutants and specific bacteria. The microsystem has been designed to perform multiple and parallel measurements in a poly-wells microfluidic device. The monitoring of the bacterial activity is ensured by optical sensors incorporated in each well of the fluidic network. By using an optode sensor, it is hereby demonstrated that this approach is efficient to measure organic pollutants by testing different Luria Bertani buffer dilutions. These results also show that it is possible to reduce the duration of measurements from 5 d (BOD5) of the standard approach to few hours, typically 3 h–5 h.

Published
2017
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12. Coupling Supercapacitors and Aeroacoustic Energy Harvesting for Autonomous Wireless Sensing in Aeronautics Applications

Author

Christophe Airiau, Jean-Marie Dilhac, Xavier Dollat, Estelle Piot, Romain Monthéard, Marise Bafleur, Vincent Boitier, Nicolas Nolhier, Équipe Énergie et Systèmes Embarqués (LAAS-ESE), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Service Instrumentation Conception Caractérisation (LAAS-I2C), ONERA - The French Aerospace Lab [Toulouse], ONERA, Institut de mécanique des fluides de Toulouse (IMFT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Investissements d'Avenir, CORALIE, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE), Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Institut de Mécanique des Fluides de Toulouse - IMFT (Toulouse, France), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), and Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP)

Subjects
energy harvesting, Engineering, Energie électrique, energy management, Embedded systems, Battery-free, Energy Engineering and Power Technology, 02 engineering and technology, Inductor, 7. Clean energy, 0203 mechanical engineering, 0202 electrical engineering, electronic engineering, information engineering, Electrochemistry, Electronic engineering, Aeroacoustics, Supercapacitors, aeroacoustics, Energy transformation, Electronics, Electrical and Electronic Engineering, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 020301 aerospace & aeronautics, supercapacitors, Renewable Energy, Sustainability and the Environment, business.industry, Energy harvesting, wireless sensor, Dynamique des Fluides, 020208 electrical & electronic engineering, Electrical engineering, Energy management, Micropower, AC power, Electricity generation, Transducer, Micro et nanotechnologies/Microélectronique, battery-free, embedded systems, Wireless sensor, business
Abstract

This paper reports for the first time the experimental demonstration of a wireless sensor node only powered by an aeroacoustic energy-harvesting device, meant to be installed on an aircraft outside skin. Aeroacoustic noise is generated on purpose to serve as a means of converting mechanical energy from high velocity airflow into electrical energy. Results related to the physical characterization of the energy conversion process are presented. The proposed aeroacoustic transducer prototype, consisting in a rectangular cavity fitted with a piezoelectric membrane, is shown to deliver up to 2 mW AC power under Mach 0.5 airflow. Optimized power management electronics has been designed to interface with the transducer, including a self-powered Synchronized Switch Harvesting on Inductor (SSHI) interface circuit and an efficient buck-boost DC/DC converter. The design of micropower auxiliary circuits adds functionality while preserving high efficiency. This circuit stores energy in supercapacitors and is able to deliver a net output DC power close to 1 mW. A fully autonomous system has been implemented and tested, successfully demonstrating aeroacoustic power generation by supplying a battery-free wireless datalogger in conditions representative of an actual flight.

Published
2016
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13. Integration of a MEMS based safe arm and fire device

Author

Véronique Conédéra, Samuel Charlot, Xavier Dollat, Ludovic Salvagnac, Carole Rossi, Fabrice Mathieu, Helene Pezous, and Marjorie Sanchez

Subjects
Microelectromechanical systems, Engineering drawing, Engineering, business.industry, Metals and Alloys, Condensed Matter Physics, Chip, Automotive engineering, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, law.invention, Ignition system, law, Electrical and Electronic Engineering, business, Instrumentation, Robotic arm
Abstract

The paper describes a new architecture of a Safe Arm and Fire device (SAF) that could constitute a real breakthrough for safe miniature fuzing device. On the one hand, it takes all the functions embodied in a conventional mechanical arm and fire system and integrates them in a single 1 cm 3 package made of assembly of different parts. On the other hand, for the first time, it combines a mechanical arming unit with electrical safety functionalities on the same silicon initiator's chip. It respects the STANAG 4187 norm (1 A/W during 5 min of not fire) and requires only 635 mW for ignition. The paper presents the design, fabrication and test of one miniature SAF device integrating a micropyrotechnical actuation.

Published
2010
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14. Fabrication, assembly and tests of a MEMS-based safe, arm and fire device

Author

Carole Rossi, Véronique Conédéra, Samuel Charlot, Marjorie Sanchez, Fabrice Mathieu, Helene Pezous, and Xavier Dollat

Subjects
Microelectromechanical systems, Fabrication, Silicon, Computer science, chemistry.chemical_element, General Chemistry, Condensed Matter Physics, Chip, Automotive engineering, law.invention, Ignition system, chemistry, law, General Materials Science, Robotic arm
Abstract

We propose a safe, arm and fire (SAF) device that could constitute a real breakthrough for safe miniature fuzing device. It integrates all the functions of a conventional mechanical arm and fire system and integrates them within 1 cm 3 . For the first time, it combines a mechanical arming unit with electrical safety functionalities on the same silicon initiator's chip. It requires only 635 mW for ignition.

Published
2010
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15. Lateral porous silicon membranes with tunable pore size for on-chip separation

Author

Fuccio Cristiano, Yingning He, David Bourrier, Xavier Dollat, Éric Imbernon, Thierry Leichle, and Adhitya Bhaswara

Subjects
Materials science, Fabrication, Dopant, 010401 analytical chemistry, Microfluidics, technology, industry, and agriculture, Analytical chemistry, 02 engineering and technology, equipment and supplies, 021001 nanoscience & nanotechnology, Porous silicon, 01 natural sciences, 0104 chemical sciences, law.invention, Ion implantation, Membrane, Chemical engineering, law, 0210 nano-technology, Porosity, Filtration
Abstract

In this work, we present a novel fabrication process for the creation of lateral porous silicon membranes with tunable pore size and porosity and their integration into planar microfluidics. Since the formation of porous silicon by anodization is highly dependent on the dopant type and concentration, we use ion implantation to manipulate the local dopant concentration in order to control the membrane properties. The dead-end filtration capability of our lateral porous silicon membranes integrated within planar microchannels is demonstrated by adequately retaining 300 nm diameter beads, while molecules such as fluorescein and miRNA permeate the membranes.

Published
2016
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16. Development of pNH4-isfets microsensors for water analysis

Author

S. Assié-Souleille, Pierre Temple-Boyer, Augustin Martinez, R. Colin, Benoit Torbiero, Iryna Humenyuk, Xavier Dollat, B. Franc, Équipe MICrosystèmes d'Analyse (LAAS-MICA), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Équipe MICrosystèmes d'Analyse ( LAAS-MICA ), Laboratoire d'analyse et d'architecture des systèmes [Toulouse] ( LAAS ), Institut National Polytechnique [Toulouse] ( INP ) -Institut National des Sciences Appliquées - Toulouse ( INSA Toulouse ), Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ) -Institut National Polytechnique [Toulouse] ( INP ) -Institut National des Sciences Appliquées - Toulouse ( INSA Toulouse ), Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ), Service Techniques et Équipements Appliqués à la Microélectronique ( LAAS-TEAM ), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Université de Toulouse (UT)

Subjects
Materials science, Environmental pollution, 02 engineering and technology, 01 natural sciences, Chemical field-effect transistor, law.invention, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, law, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, pNH4 + ion detection, Spin coating, business.industry, 010401 analytical chemistry, General Engineering, Electrical engineering, Biasing, 021001 nanoscience & nanotechnology, 6. Clean water, 0104 chemical sciences, Threshold voltage, water analysis, 13. Climate action, Optoelectronics, [ SPI.NANO ] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [ CHIM.ANAL ] Chemical Sciences/Analytical chemistry, Field-effect transistor, ChemFET sensor, Photolithography, ISFET, 0210 nano-technology, business
Abstract

International audience; Front-side connected, N-channel, normally-off, SiO2/Si3N4 chemical field effect transistor (ChemFET) microsensors have been fabricated using a standard P-well silicon technology. These ChemFETs microsensors were adapted to ammonium ion detection thanks to photosensitive polysiloxane (PSX) polymer containing nonactine as an ionophore. The ammonium-sensitive membrane has been deposited either manually by micropipette, either by spin coating and patterned using photolithography technique. Both processes have been studied and compared through the ammonium ion determination. The manually deposed layers have been characterised by thickness non-reproducibility. Therefore, spin-coated layers have good reproducibility, but their thickness of 30 µm has been responsible for an increase of the ISFET threshold voltage and a decrease of its bias current. Nevertheless, in both cases, good sensitivities have been shown on the [1 – 5] pNH4 range even if saturation phenomena have been evidenced for the lowest concentrations. These pNH4-ISFETs microsensors are developed for the monitoring of environmental pollution and more precisely for ground water analysis.

Published
2006
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17. New two-dimensional friction force apparatus design for measuring shear forces at the nanometer scale

Author

Linmao Qian, Eric Perez, Denis Douillet, Gustavo S. Luengo, Magali Charlot, and Xavier Dollat

Subjects
Shear rate, Materials science, Classical mechanics, Orders of magnitude (temperature), Capacitive sensing, Shear force, Mechanical impedance, Calibration, Mechanics, Instrumentation, Strain gauge, Friction torque
Abstract

A device to study the friction of two molecularly smooth surfaces separated by an ultrathin liquid film is presented along with its design, calibration, and performance. The apparatus can move one of the surfaces and measure the friction force on the other one bidimensionally for both processes. A high mechanical impedance system (104 N/m) measures continuous friction forces where only stick–slip was previously observed. The frequency and travel distance of the movement can be varied over a wide range (frequency from 10−4 to 7 Hz and distance from 1 to 800 μm) to provide variations of the shear rate over seven orders of magnitude. The actual movement provided by piezoelectric bimorph drive can be affected by the friction forces and is measured by strain gauges. The friction forces are measured with an accuracy of ±2μN with a capacitance sensor. The mechanical design prevents the surfaces from rolling under force. The apparatus is tested with hexadecane. The potential applications of this apparatus and its...

Published
2001
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18. Powering a Commercial Datalogger by Energy Harvesting from Generated Aeroacoustic Noise

Author

Jean-Marie Dilhac, Christophe Airiau, Vincent Boitier, Eugène Piot, Marise Bafleur, Nicolas Nolhier, Romain Monthéard, Xavier Dollat, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)

Subjects
020301 aerospace & aeronautics, History, Engineering, business.industry, Energy harvesting, Interface (computing), Electrical engineering, 02 engineering and technology, 021001 nanoscience & nanotechnology, 7. Clean energy, Computer Science Applications, Education, Acoustique, Noise, Electricity generation, 0203 mechanical engineering, Data logger, Aeroacoustics, Energy transformation, Wireless, Electronics, 0210 nano-technology, business
Abstract

This paper reports the experimental demonstration of a wireless sensor node only powered by an aeroacoustic energy harvesting device, meant to be installed on an aircraft outside skin. New results related to the physical characterization of the energy conversion process are presented. Optimized interface electronics has been designed, which allows demonstrating aeroacoustic power generation by supplying a commercial wireless datalogger in conditions representative of an actual flight.

Published
2014

19. Proof of concept of energy harvesting from aero acoustic noise

Author

Romain Monthéard, Carbonne, S., Marise Bafleur, Vincent Boitier, Jean-Marie Dilhac, Xavier Dollat, Nicolas Nolhier, Estelle Piot, Christophe Airiau, Équipe Énergie et Systèmes Embarqués (LAAS-ESE), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Airbus [France], Service Instrumentation Conception Caractérisation (LAAS-I2C), ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), Institut de mécanique des fluides de Toulouse (IMFT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), and Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP)

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Computer Science::Sound, Aeroacoustic cavity, [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph], Rossiter modes, Acoustic energy harvesting, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

International audience; This paper reports the testing of a new mechanism converting energy radiated from an acoustic source, i.e. a small cavity created on an aircraft outside skin and inducing high frequency oscillations of airflow passing over it. This acoustic noise is then converted into electrical energy. We have submitted in a wind tunnel a set of cavities to an airflow varying the Mach number, creating high sound levels. In a second set of experiments, we have submitted passive microphones to high acoustic levels and stored in capacitors the electrical energy collected at the microphone output. Finally, directions for future work are identified.

Published
2012

20. A versatile method for generating single DNA molecule patterns: Through the combination of directed capillary assembly and (micro/nano) contact printing

Author

Aline Cerf, Xavier Dollat, Jérôme Chalmeau, Angélique Coutable, Christophe Vieu, Équipe Ingénierie pour les sciences du vivant (LAAS-ELIA), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse 1 Capitole (UT1)-Université Toulouse - Jean Jaurès (UT2J)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse 1 Capitole (UT1)-Université Toulouse - Jean Jaurès (UT2J), Service Instrumentation Conception Caractérisation (LAAS-I2C), Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés (LISBP), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Recherche Agronomique (INRA), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, EC [NMP4-CT-2003-500120], 'Region Midi-Pyrenees' council, Institut des Technologies Avancees en sciences du Vivant (ITAV), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Institut National de la Recherche Agronomique (INRA)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), and Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Nanostructure, Capillary action, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Soft lithography, chemistry.chemical_compound, [SPI]Engineering Sciences [physics], General Materials Science, Nanoscopic scale, Lithography (deposition), Polydimethylsiloxane, Mechanical Engineering, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Biomaterial, 0104 chemical sciences, Template, chemistry, Mechanics of Materials, 0210 nano-technology, Contact print, DNA
Abstract

International audience; One of the challenges in the development of molecular scale devices is the integration of nano-objects or molecules onto desired locations on a surface. This integration comprises their accurate positioning, their alignment, and the preservation of their functionality. Here, we proved how capillary assembly in combination with soft lithography can be used to perform DNA molecular combing to generate chips of isolated DNA strands for genetic analysis and diagnosis. The assembly of DNA molecules is achieved on a topologically micropatterned polydimethylsiloxane stamp inducing almost simultaneously the trapping and stretching of single molecules. The DNA molecules are then transferred onto aminopropyltriethoxysilane-coated surfaces. In fact, this technique offers the possibility to tightly control the experimental parameters to direct the assembly process. This technique does not induce a selection in size of the objects, therefore it can handle complex solutions of long (tens of kbp) but also shorter (a few thousands of bp) molecules directly in solution to allow the construction of future one-dimensional nanoscale building templates.

Published
2011
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21. Design and experimental validation of a compact quadrifilar helix antenna in VHF band

Author

Alexandru Takacs, Xavier Dollat, Nelson J. G. Fonseca, and Hervé Aubert

Subjects
Reduction (complexity), Engineering, business.industry, Telemetry, Helix, Electronic engineering, Reference antenna, Impedance matching, Satellite, Helical antenna, business, Realization (systems)
Abstract

A compact quadrifilar helix antenna is presented in the VHF band. The design and experimental validation on a low-cost realization are detailed in this paper. This design could be used on the telemetry link for the SVOM satellite project. Compared to the reference antenna, a significant height reduction of 48% is demonstrated. The measurement and simulation results reveal the capability of this design to improve slightly the naturally poor input matching of quarter wavelength quadrifilar helix antennas. A simple and low-cost manufacturing technique is also proposed to validate the design.

Published
2009
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22. Miniaturization of quadrifilar helix antenna for VHF band applications

Author

Xavier Dollat, Alexandru Takacs, Nelson J. G. Fonseca, and Hervé Aubert

Subjects
Wavelength, Engineering, business.industry, Acoustics, Helix, Miniaturization, Reflection (physics), Electronic engineering, Impedance matching, Satellite, Very high frequency, Helical antenna, business
Abstract

This paper addresses the miniaturization of the VHF band quadrifilar helix antenna. The design and experimental validation are reported in this paper. Such a helix could be used, e.g., for telemetry link in Space-based Multi-band Variable Object Monitor satellite project. Compared to the reference quarter wavelength quadrifilar helix antenna, a significant height reduction from 48% to 62.5% is obtained. Moreover, the measurement and simulation results reveal the capability of the resulting compact antennas to improve slightly the well-known poor impedance matching of classical quarter wavelength quadrifilar helix antennas. A simple and low-cost manufacturing technique is finally detailed for validation purpose.

Published
2009
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23. A novel fabrication method of flexible and monolithic 3D microfluidic structures using lamination of SU-8 films

Author

Anne Marie Gué, Christine Lattes, Xavier Dollat, I. Patrick Abgrall, Véronique Conédéra, Stéphane Colin, Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Laboratoire de Génie Mécanique de Toulouse (LGMT), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Service Instrumentation Conception Caractérisation (LAAS-I2C), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), and Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1)

Subjects
Fabrication, Materials science, Microfluidics, Nanotechnology, 02 engineering and technology, Deformation (meteorology), 01 natural sciences, law.invention, [SPI]Engineering Sciences [physics], law, Lamination, Wafer, Electrical and Electronic Engineering, Composite material, chemistry.chemical_classification, Mechanical Engineering, 010401 analytical chemistry, Polymer, 021001 nanoscience & nanotechnology, Microstructure, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, chemistry, Mechanics of Materials, 0210 nano-technology, Layer (electronics)
Abstract

International audience; The fabrication of three-dimensional (3D) microfluidic networks entirely made of SU-8 with integrated electrodes is reported. The described technology allows the fabrication of uncrosslinked SU-8 dry film on a polyester (PET) sheet and its subsequent lamination to form closed microstructures. Unlike other reported methods, transferred layers are patterned following the bonding step allowing a more accurate and simple alignment between levels than techniques using already patterned layers. Dry release of the complete polymer microstructure was demonstrated. Flexible microfluidic chips were obtained. This technique uses simple tools and no wafer bonder is used but lamination techniques which are more collective processes. Limitations in the method for layers thicker than 50 µm have been observed and are discussed. Hydraulic flow experiments have been performed to study the deformation of the cover layer which could influence adjacent flow in a three-dimensional configuration. Important deformations have been observed for layers 10 µm thick and an average pressure greater than 100 kPa. No deformations have been noted for layers with thicknesses greater than 35 µm and for average pressures up to 200 kPa. No failures occurred within the range of the experimental set-up, i.e. up to 300 kPa.

Published
2006
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24. Impact of the Packaging on the Static Behavior of Piezoresitive Pressure Sensor Dedicated to the Monitoring of Blast Waves

Author

Bilel Achour, Lilian Marty, Kevin Sanchez, Samuel Charlot, Xavier Dollat, Benjamin Reig, Laurent Bouscayrol, Aurélie Lecestre, Anthony Coustou, André Ferrand, Hervé Aubert, Patrick Pons, Équipe MIcro et Nanosystèmes pour les Communications sans fil (LAAS-MINC), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Service Instrumentation Conception Caractérisation (LAAS-I2C), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT), and RENATECH CEA-DAM

Subjects
[SPI]Engineering Sciences [physics], blast waves, Finite Element Method, packaging, mechanical stress, pressure sensor, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics
Abstract

International audience; The packaging is an important step, allowing to transform the transducer chip into a sensor. This step is necessary to perform the sensor characterization in a real environment, while minimizing the impact of the influence parameters on the sensor response. This study concerns the impact of the packaging on the static response of a miniature pressure sensor dedicated to the monitoring of blast waves. The transducer is based on 5 µm-thick rectangular (55 µm x 135 µm) silicon membrane and piezoresistive gauges. Pressure sensitivity measurements are performed using stressed and non-stressed sensor's holder configurations. Measurements results indicate that the pressure sensitivity is doubled when the sensor's holder is stressed. Finite Element Method simulations using COMSOL Multiphysics software show here that this result originates from the deformation of the sensor's holder, which leads to the deflection of the thin silicon membrane.

25. A MICROFLUIDIC MAGNETIC HYBRID ACTUATOR FOR ADVANCED HANDLING FUNCTIONS AT CELL RESOLUTION

Author

Marc Fouet, Rémi Courson, Xavier Dollat, Daniel Medale, Anne-Marie Gue, Équipe Nano Ingénierie et Intégration des Systèmes (LAAS-N2IS), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Service Instrumentation Conception Caractérisation (LAAS-I2C), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Université de Toulouse (UT)

Subjects
LOC, "microfluidics", microfluidics, "magnetic cell sorting", "LOC", [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, magnetic cell sorting
Abstract

Accepté 10th International Conference on the Scientific and Clinical Applications of Magnetic Carriers 10-14 june 2014 Dresden Germany; International audience; In microfluidics, the use of super-paramagnetic microparticles (SMPs) has experienced a dramatic increase over the last decade, but control of the magnetic field at micro scale is still a topical issue. Permanent magnets don't offer a programmable approach, external coils require a certain power, and neither are usually integrated. Hybrid systems, which include external magnets to generate a high and homogeneous magnetic field, and integrated coils that produce a high gradient, are seemingly a promising way to reach a higher precision in magnetic actuation, not mentioning the forces they create on SMPs can be attractive or repulsive. The goal of our work, for one part, is to develop a simple solution for the micro-fabrication of this kind of devices, but also to delve into the design possibilities, for instance to create a separation stage or investigate more exotic functions like focusing (without leading to a dilution or an increase in the flow rate, unlike most hydrodynamic focusing techniques).

26. Simple Synthetic Molecular Hydrogels from Self- Assembling Alkylgalactonamides as Scaffold for 3D Neuronal Cell Growth

Author

Laurence Vaysse, Laurent Malaquin, Sandrine Souleille, Anaïs Chalard, Juliette Fitremann, Isabelle Loubinoux, Pierre Joseph, Barbara Lonetti, Jean-Christophe Sol, Interactions moléculaires et réactivité chimique et photochimique (IMRCP), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Fédération de Recherche Fluides, Energie, Réacteurs, Matériaux et Transferts (FERMAT), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Équipe Micro-Nanofluidique pour les sciences de la vie et de l’environnement (LAAS-MILE), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Toulouse Neuro Imaging Center (ToNIC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Toulouse Mind & Brain Institut (TMBI), Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université Toulouse - Jean Jaurès (UT2J), IDeAS - Interfaces Dynamiques et Assemblages Stimulables (IDeAS), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie de Toulouse (ICT), Équipe Ingénierie pour les sciences du vivant (LAAS-ELIA), Service Instrumentation Conception Caractérisation (LAAS-I2C), Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Stéphanie Bosch and Brice Ronsin (confocal microscopy, plateforme d'imagerie CBI-LITC constitutive de TRI (Toulouse Réseau d'Imagerie)), Bruno Payré, Isabelle Fourquaux, Dominique Goudounèche (TEM and cryo-TEM, Centre de Microscopie Electronique Appliquée à la Biologie, CMEAB), Xavier Dollat (LAAS), Delphine Bordignon (IMRCP), Pierre Roblin (SAXS, Fermat Federation, Toulouse), The French National Research Agency (ANR Neuraxe) is greatly acknowledged for A.C grant financial and financial support. The European Union is acknowledged for its financial support for equipment (FEDER-35477: 'Nano-objets pour la biotechnologie')., ANR-15-CE07-0007,NEURAXE,Gels supramoléculaires orientés pour le guidage de cellules souches neurales(2015), Interactions moléculaires et réactivité chimique et photochimique ( IMRCP ), Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ), Équipe Micro-Nanofluidique pour les sciences de la vie et de l’environnement ( LAAS-MILE ), Laboratoire d'analyse et d'architecture des systèmes [Toulouse] ( LAAS ), Institut National Polytechnique [Toulouse] ( INP ) -Institut National des Sciences Appliquées - Toulouse ( INSA Toulouse ), Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ) -Institut National Polytechnique [Toulouse] ( INP ) -Institut National des Sciences Appliquées - Toulouse ( INSA Toulouse ), Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ), Toulouse Neuro Imaging Center ( ToNIC ), Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Hôpital Purpan - Centre Hospitalier Universitaire (CHU) de Toulouse-Université Toulouse III - Paul Sabatier, Équipe Ingénierie pour les sciences du vivant ( LAAS-ELIA ), Service Instrumentation Conception Caractérisation ( LAAS-I2C ), CHU Toulouse [Toulouse], ANR-15-CE07-0007,Neuraxe,Oriented supramolecular gels as a guide for neural stem cells, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hôpital Purpan [Toulouse], and CHU Toulouse [Toulouse]-CHU Toulouse [Toulouse]

Subjects
Scaffold, Materials science, Neurogenesis, Cell Culture Techniques, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, law.invention, adult human neural stem cells, 3D cell culture, supramolecular gel, Confocal microscopy, law, [ CHIM.OTHE ] Chemical Sciences/Other, Neurites, Humans, General Materials Science, Neurons, Tissue Scaffolds, Cell growth, biomaterial, Cell Differentiation, Hydrogels, self-assembly, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, neuron, 0104 chemical sciences, LMWG, Cell culture, [ CHIM.MATE ] Chemical Sciences/Material chemistry, Neural tissue regeneration, Self-healing hydrogels, Biophysics, Stem cell, 0210 nano-technology, [CHIM.OTHE]Chemical Sciences/Other, hNSC
Abstract

This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Appl. Mater. Interfaces, copyright ©American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsami.8b01365.; International audience; In this work, we demonstrated that the hydrogel obtained from a very simple and single synthetic molecule, N-heptyl-galactonamide was a suitable scaffold for the growth of neuronal cells in 3D. We evidenced by confocal microscopy the presence of the cells into the gel up to a depth of around 200 µm, demonstrating that the latter was permissive to cell growth and enabled a true 3D colonization and organization. It also supported successfully the differentiation of adult human neuronal stem cells (hNSCs) into both glial and neuronal cells and the development of a really dense neurofilament network. So the gel appears to be a good candidate for neural tissue regeneration. In contrast with other molecular gels described for cell culture, the molecule can be obtained at the gram scale by a one-step reaction. The resulting gel is very soft, a quality in accordance with the aim of growing neuronal cells, that requires low modulus substrates similar to the brain. But because of its fragility, specific procedures had to be implemented for its preparation and for cell labeling and confocal microscopy observations. Notably, the implementation of a controlled slow cooling of the gel solution was needed to get a very soft but nevertheless cohesive gel. In these conditions, very wide straight and long micrometric fibers were formed, held together by a second network of flexible narrower nanometric fibers. The two kinds of fibers guided the neurite and glial cell growth in a different way. We also underlined the importance of a tiny difference in the molecular structure on the gel performances: parent molecules, differing by a one-carbon increment in the alkyl chain length, N-hexyl-galactonamide and N-octyl-galactonamide, were not as good as N-heptyl-galactonamide. Their differences were analysed in terms of gel fibers morphology, mechanical properties, solubility, chain parity and cell growth.

Published
2018
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27. Notice d'installation et d'utilisation du four de degazage MBE32 sous CRYSTALXE

Author

Gravelier, Quentin, Arnoult, Alexandre, Lacoste, Guy, Marcoul, Patrick, Brossa, Vincent, Dollat, Xavier, Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Service Instrumentation Conception Caractérisation (LAAS-I2C), laas-cnrs, vincent brossa, alexandre arnoult, xavier dollat, guy lacoste, Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées

Subjects
[PHYS.PHYS.PHYS-ATM-PH]Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus], [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Abstract

L’évolution du matériel et des techniques au sein du laboratoire du LAAS-CNRS de Toulouse a permis la semi-automatisation du dégazage des substrats des réacteurs MBE 32 et MBE2300.Le document qui suit vise à constituer de la manière la plus exhaustive possible, une trace de l’ensemble des informations liées à l’automatisation du dégazage des substrats et à expliquer son utilisation sous le logiciel CRYSTAL XE.

Published
2017

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