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44 results on '"Lassagne, B."'

1. Spin dependent charge transfer in MoSe2/hBN/Ni hybrid structures

Author

Tornatzky, H., Robert, C., Renucci, P., Han, B., Blon, T., Lassagne, B., Ballon, G., Lu, Y., Watanabe, K., Taniguchi, T., Urbaszek, B., Lopes, J. M. J., and Marie, X.

Subjects
Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We present magneto-photoluminescence measurements in a hybrid 2D semiconductor/ferromagnetic structure consisting of MoSe2/hBN/Ni. When the Nickel layer is magnetized, we observe circularly polarized photoluminescence of the trion peak in MoSe2 monolayer under linearly polarized excitation. This build-up of circular polarization can reach a measured value of about 4% when the magnetization of Ni is saturated perpendicularly to the sample plane, and changes its sign when the magnetization is reversed. The circular polarization decreases when the hBN barrier thickness increases. These results are interpreted in terms of a spin-dependent charge transfer between the MoSe2 monolayer and the Nickel film. The build-up of circular polarization is observed up to 120 K, mainly limited by the trion emission that vanishes with temperature.

Published
2021
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2. Platinum tripods as nanometric frequency multiplexing devices

Author

Camargo, B. C., Lassagne, B., Arenal, R., Gatel, C., Blon, T., Viau, G., Lacroix, L-M, and Escoffier, W.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Abstract

Electrical and structural characterization of nano-particles are very important steps to determine their potential applications in microelectronics. In this paper, we adress the crystallographic and electric transport properties of soft-chemistry-grown nanometric Pt tribranches. We report that Pt nanostars grown from the reduction of $\text{H}_{2}\text{PtCl}_6$ salt in pure oleylamine present a remarkable crystalline structure and a deeply metallic character despite being grown under mild conditions. We demonstrate that such devices are able to operate at current densities surpassing $200$ MA/$\text{cm}^2$, actuating as highly compact frequency multiplexers in the non-ohmic regime.

Published
2018
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3. Optical spectroscopy of excited exciton states in MoS2 monolayers in van der Waals heterostructures

Author

Robert, C., Semina, M. A., Cadiz, F., Manca, M., Courtade, E., Taniguchi, T., Watanabe, K., Cai, H., Tongay, S., Lassagne, B., Renucci, P., Amand, T., Marie, X., Glazov, M. M., and Urbaszek, B.

Subjects
Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

The optical properties of MoS2 monolayers are dominated by excitons, but for spectrally broad optical transitions in monolayers exfoliated directly onto SiO2 substrates detailed information on excited exciton states is inaccessible. Encapsulation in hexagonal boron nitride (hBN) allows approaching the homogenous exciton linewidth, but interferences in the van der Waals heterostructures make direct comparison between transitions in optical spectra with different oscillator strength more challenging. Here we reveal in reflectivity and in photoluminescence excitation spectroscopy the presence of excited states of the A-exciton in MoS2 monolayers encapsulated in hBN layers of calibrated thickness, allowing to extrapolate an exciton binding energy of about 220 meV. We theoretically reproduce the energy separations and oscillator strengths measured in reflectivity by combining the exciton resonances calculated for a screened two-dimensional Coulomb potential with transfer matrix calculations of the reflectivity for the van der Waals structure. Our analysis shows a very different evolution of the exciton oscillator strength with principal quantum number for the screened Coulomb potential as compared to the ideal two-dimensional hydrogen model., Comment: 7 pages, 3 figures, supplement

Published
2017
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4. Exciton Radiative Lifetime in Transition Metal Dichalcogenide Monolayers

Author

Robert, C., Lagarde, D., Cadiz, F., Wang, G., Lassagne, B., Amand, T., Balocchi, A., Renucci, P., Tongay, S., Urbaszek, B., and Marie, X.

Subjects
Condensed Matter - Materials Science
Abstract

We have investigated the exciton dynamics in transition metal dichalcogenide mono-layers using time-resolved photoluminescence experiments performed with optimized time-resolution. For MoSe2 monolayers, we measure $\tau_{rad}=1.8\pm0.2$ ps that we interpret as the intrinsic radiative recombination time. Similar values are found for WSe2 mono-layers. Our detailed analysis suggests the following scenario: at low temperature (T $\leq$ 50 K), the exciton oscillator strength is so large that the entire light can be emitted before the time required for the establishment of a thermalized exciton distribution. For higher lattice temperatures, the photoluminescence dynamics is characterized by two regimes with very different characteristic times. First the PL intensity drops drastically with a decay time in the range of the picosecond driven by the escape of excitons from the radiative window due to exciton- phonon interactions. Following this first non-thermal regime, a thermalized exciton population is established gradually yielding longer photoluminescence decay times in the nanosecond range. Both the exciton effective radiative recombination and non-radiative recombination channels including exciton-exciton annihilation control the latter. Finally the temperature dependence of the measured exciton and trion dynamics indicates that the two populations are not in thermodynamical equilibrium., Comment: 23 pages, 7 figures

Published
2016
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5. Electron and hole doping of monolayer WSe2 induced by twisted ferroelectric hexagonal boron nitride

Author

Fraunié, J., primary, Jamil, R., additional, Kantelberg, R., additional, Roux, S., additional, Petit, L., additional, Lepleux, E., additional, Pacheco, L., additional, Watanabe, K., additional, Taniguchi, T., additional, Jacques, V., additional, Lombez, L., additional, Glazov, M. M., additional, Lassagne, B., additional, Marie, X., additional, and Robert, C., additional

Published
2023
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6. Dissipative and conservative nonlinearity in carbon nanotube and graphene mechanical resonators

Author

Moser, J., Eichler, A., Lassagne, B., Chaste, J., Tarakanov, Y., Kinaret, J., Wilson-Rae, I., and Bachtold, A.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Graphene and carbon nanotubes represent the ultimate size limit of one and two-dimensional nanoelectromechanical resonators. Because of their reduced dimensionality, graphene and carbon nanotubes display unusual mechanical behavior; in particular, their dynamics is highly nonlinear. Here, we review several types of nonlinear behavior in resonators made from nanotubes and graphene. We first discuss an unprecedented scenario where damping is described by a nonlinear force. This scenario is supported by several experimental facts: (i) the quality factor varies with the amplitude of the motion as a power law whose exponent coincides with the value predicted by the nonlinear damping model, (ii) hysteretic behavior (of the motional amplitude as a function of driving frequency) is absent in some of our resonators even for large driving forces, as expected when nonlinear damping forces are large, and (iii) when we quantify the linear damping force (by performing parametric excitation measurements) we find that it is significantly smaller than the nonlinear damping force. We then review parametric excitation measurements, an alternative actuation method which is based on nonlinear dynamics. Finally, we discuss experiments where the mechanical motion is coupled to electron transport through a nanotube. The coupling can be made so strong that the associated force acting on the nanotube becomes highly nonlinear with displacement and velocity. Overall, graphene and nanotube resonators hold promise for future studies on classical and quantum nonlinear dynamics., Comment: To appear in "Fluctuating Nonlinear Oscillators", Edited by Mark Dykman

Published
2011

7. Imaging mechanical vibrations in suspended graphene sheets

Author

Garcia-Sanchez, D., van der Zande, A. M., Paulo, A. San, Lassagne, B., McEuen, P. L., and Bachtold, A.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We carried out measurements on nanoelectromechanical systems based on multilayer graphene sheets suspended over trenches in silicon oxide. The motion of the suspended sheets was electrostatically driven at resonance using applied radio-frequency voltages. The mechanical vibrations were detected using a novel form of scanning probe microscopy, which allowed identification and spatial imaging of the shape of the mechanical eigenmodes. In as many as half the resonators measured, we observed a new class of exotic nanoscale vibration eigenmodes not predicted by the elastic beam theory, where the amplitude of vibration is maximum at the free edges. By modeling the suspended sheets with the finite element method, these edge eigenmodes are shown to be the result of non-uniform stress with remarkably large magnitudes (up to 1.5 GPa). This non-uniform stress, which arises from the way graphene is prepared by pressing or rubbing bulk graphite against another surface, should be taken into account in future studies on electronic and mechanical properties of graphene.

Published
2008
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8. Spin dependent charge transfer in MoSe2/hBN/Ni hybrid structures

Author

Tornatzky, H., primary, Robert, C., additional, Renucci, P., additional, Han, B., additional, Blon, T., additional, Lassagne, B., additional, Ballon, G., additional, Lu, Y., additional, Watanabe, K., additional, Taniguchi, T., additional, Urbaszek, B., additional, Lopes, J. M. J., additional, and Marie, X., additional

Published
2021
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11. Spin dependent charge transfer in MoSe2/hBN/Ni hybrid structures.

Author

Tornatzky, H., Robert, C., Renucci, P., Han, B., Blon, T., Lassagne, B., Ballon, G., Lu, Y., Watanabe, K., Taniguchi, T., Urbaszek, B., Lopes, J. M. J., and Marie, X.

Subjects
CHARGE transfer, NICKEL films, CIRCULAR polarization, MONOMOLECULAR films, MAGNETIZATION
Abstract

We present magneto-photoluminescence measurements in a hybrid two-dimensional semiconductor/ferromagnetic structure consisting of MoSe2/hBN/Ni. When the nickel layer is magnetized, we observe circularly polarized photoluminescence of the trion peak in the MoSe2 monolayer under linearly polarized excitation. This build-up of circular polarization can reach a measured value of about 4% when the magnetization of Ni is saturated perpendicularly to the sample plane and changes its sign when the magnetization is reversed. The circular polarization decreases when the hBN barrier thickness increases. These results are interpreted in terms of a spin-dependent charge transfer between the MoSe2 monolayer and the nickel film. The build-up of circular polarization is observed up to 120 K, mainly limited by the trion emission that vanishes with temperature. [ABSTRACT FROM AUTHOR]

Published
2021
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12. Optical spectroscopy of excited exciton states in MoS2 monolayers in van der Waals heterostructures

Author

Robert, C., primary, Semina, M. A., additional, Cadiz, F., additional, Manca, M., additional, Courtade, E., additional, Taniguchi, T., additional, Watanabe, K., additional, Cai, H., additional, Tongay, S., additional, Lassagne, B., additional, Renucci, P., additional, Amand, T., additional, Marie, X., additional, Glazov, M. M., additional, and Urbaszek, B., additional

Published
2018
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14. Landau Level Formation in Carbon Nanotubes-Based Electronic Fabry-Perot Resonators – exploration under 60T

Author

Raquet, Bertrand, Avriller, R., Lassagne, B., Nanot, Sebastien, Escoffier, Walter, Broto, Jean-Marc, Roche, S., Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2008

15. International conference on Micro and Nano-engineering MNE-2006

Author

Langford, R., Thornton, M., Wang, X., Blau, W., Lassagne, B., Raquet, Bertrand, Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2006

16. Resistance fluctuations in multi-wall carbon nanotubes

Author

Raquet, Bertrand, Lassagne, B., Cleuziou, Jp, Broto, Jm, Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2006

17. Magneto-transport dans les nanotubes de carbone individuels

Author

Lassagne, B., Nanot, Sebastien, Avrillé, R., Roche, S., Raquet, Bertrand, Broto, Jm, Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2006

18. Bruit électronique dans les nanotubes de carbone individuerls

Author

Raquet, Bertrand, Lassagne, B., Nanot, Sebastien, Cleuziou, Jp, Broto, Jm, Laboratoire National des Champs Magnétiques Pulsés (LNCMP), 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), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2006

19. High magnetic field magneto-conductance in individual carbon nanotubes

Author

Nanot, Sebastien, Escoffier, Walter, Raquet, Bertrand, Lassagne, B., Cleuziou, Jp, Avrillé, R., Roche, S., Broto, Jm, Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2006

20. Unconventional magneto-transport phenomena in individual carbon nanotubes

Author

Lassagne, B., Raquet, Bertrand, Broto, Jean-Marc, Flahaut, E., Ondarçuhu, Thierry, Vieu, Christophe, Gonzalez, J., Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), the Institute of Physics conference Series, Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2005

21. Electronic transport in individual carbon nanotubes

Author

Lassagne, B., Raquet, Bertrand, Broto, Jm, Laboratoire National des Champs Magnétiques Pulsés (LNCMP), 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), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2005

22. NT'05: Sixth International Conference on the Science and Application of Nanotubes

Author

Broto, Jean-Marc, Raquet, Bertrand, Lassagne, B., Flahaut, E., Vieu, Christophe, Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2005

23. Pressure dependence of Raman modes in DWCNT filled with 1D nanocrystalline PbI2 Semiconductor

Author

Gonzalez, J., Power, C., Broto, Jean-Marc, Raquet, Bertrand, Lassagne, B., Flahaut, E., Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), the Institute of Physics conference Series, 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2005

24. Electronic fluctuations in individual multiwall carbon nanotubes

Author

Raquet, Bertrand, Lassagne, B., Broto, Jm, Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2005

25. Magneto-transport phenomena in carbon nanotube under 60T

Author

Fedorov, G., Lassagne, B., Sagnes, M., Raquet, Bertrand, Broto, Jean-Marc, Triozon, F., Roche, S., Laboratoire National des Champs Magnétiques Pulsés (LNCMP), 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), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2004

26. Magneto-transport under 60T in Double Wall Carbon Nanotubes

Author

Lassagne, B., Fedorov, G., Sagnes, M., Raquet, Bertrand, Broto, Jean-Marc, Triozon, F., Roche, S., Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2004

27. Magneto-transport in Double Wall Carbon Nanotubes : Novel features under 60T

Author

Raquet, Bertrand, Lassagne, B., Fedorov, G., Sagnes, M., Broto, Jean-Marc, Triozon, F., Roche, S., Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2004

28. Transport quantique dans un nanotube de carbone : Etude sous champ magnétique intense

Author

Raquet, Bertrand, Fedorov, G., Lassagne, B., Sagnes, M., Broto, Jm, Flahaut, E., Laurent, Ch., Vieu, Christophe, Ondarcuhu, Th., Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2003

29. Electronic properties of Carbon nanotubes in high magnetic field

Author

Raquet, Bertrand, Broto, Jm, Fedorov, G., Lassagne, B., Sagnes, M., Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Published
2003

38. Impact of French lockdowns on bereavement experiences: Insight from ALCESTE analysis revealing psychological resilience and distinct grief dynamics amidst COVID-19.

Author

Sani L, Chemrouk Y, Lassagne B, Cape C, Ngo Nkana M, Cherblanc J, and Bacqué MF

Abstract

At the beginning of 2020, the entire world was shocked by a global health emergency. According to the literature, fear, high mortality and health restrictions had significant psychological consequences on the population. This study evaluates the French lockdown's impact on the grieving process and how people worked through their grief. Two semi-structured interviews were conducted with 31 participants who had lost a loved one between March 2020, June, and September 2021 (T0) and 6 months later (T1). Subsequently, they were divided into two groups: those who lost someone during the first lockdown (Group 1) and those who lost someone outside the lockdown periods (Group 2). The interviews were analysed using the ALCESTE software, a statistical analysis tool for textual data based on word co-occurrences. This research significantly advances the understanding of bereavement during crises, providing new perspectives and practical insights for policymakers, healthcare professionals and support organisations. Its methodological innovation and detailed analysis contribute to the ongoing discussion on grief and resilience in challenging circumstances. Ultimately, this study lays the foundation for improved support and intervention strategies tailored to the needs of bereaved individuals during crises., (© 2024 The Author(s). International Journal of Psychology published by John Wiley & Sons Ltd on behalf of International Union of Psychological Science.)

Published
2024
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39. The Absence of Funeral Rites as a Risk Factor for the French Bereaved Population.

Author

Sani L, Cape C, Merheb J, Poulin N, Lassagne B, Canet G, Lallemant M, Cherblanc J, De Vincenzo C, Testoni I, Canellopoulos L, Kaufmann NT, and Bacqué MF

Abstract

During the COVID-19 pandemic, stringent measures were imposed in numerous countries, including France. These measures significantly disrupted societal practices, particularly mourning and funeral rituals. This study, conducted between June and September 2021 as part of the COVIDEUIL-France research, involved 242 participants, predominantly female (84%) with an average age of 49.64 years. The research aimed to investigate the consequences of the absence of funeral rituals and the adoption of personalized, domestic, and digital alternatives. Using online surveys and psychological tools, including the Traumatic Grief Inventory Self Report Version (TGI-SR), General Health Questionnaire-28 (GHQ-28), and Post-traumatic Growth Inventory (PTGI), the study found a significant correlation between the lack of traditional practices and grief complications. Despite 21.81% of participants compensating with personal commemorations, digital commemorations were underutilized, raising questions about their effectiveness. The study provides crucial insights, emphasizing the need to address the psychological effects of disrupted mourning practices in France., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Published
2024
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40. Tuning Magnetic Properties of a Carbon Nanotube-Lanthanide Hybrid Molecular Complex through Controlled Functionalization.

Author

Mosse IS, Sodisetti VR, Coleman C, Ncube S, de Sousa AS, Erasmus RM, Flahaut E, Blon T, Lassagne B, Šamořil T, and Bhattacharyya S

Subjects
Gadolinium DTPA chemistry, Magnetic Phenomena, Microscopy, Electron, Transmission, Nanotubes, Carbon ultrastructure, Spectrometry, Mass, Secondary Ion, Spectrum Analysis, Raman, Lanthanoid Series Elements chemistry, Magnets chemistry, Nanotubes, Carbon chemistry
Abstract

Molecular magnets attached to carbon nanotubes (CNT) are being studied as potential candidates for developing spintronic and quantum technologies. However, the functionalization routes used to develop these hybrid systems can drastically affect their respective physiochemical properties. Due to the complexity of this systems, little work has been directed at establishing the correlation between the degree of functionalization and the magnetic character. Here, we demonstrate the chemical functionalization degree associated with molecular magnet loading can be utilized for controlled tuning the magnetic properties of a CNT-lanthanide hybrid complex. CNT functionalization degree was evaluated by interpreting minor Raman phonon modes in relation to the controlled reaction conditions. These findings were exploited in attaching a rare-earth-based molecular magnet (Gd-DTPA) to the CNTs. Inductively coupled plasma mass spectrometry, time-of-flight secondary ion mass spectrometry and super conducting quantum interference device (SQUID) measurements were used to elucidate the variation of magnetic character across the samples. This controlled Gd-DTPA loading on the CNT surface has led to a significant change in the nanotube intrinsic diamagnetism, showing antiferromagnetic coupling with increase in the Weiss temperature with respect to increased loading. This indicates that synthesis of a highly correlated spin system for developing novel spintronic technologies can be realized through a carbon-based hybrid material.

Published
2021
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41. Platinum tripods as nanometric frequency multiplexing devices.

Author

Camargo BC, Lassagne B, Arenal R, Gatel C, Blon T, Viau G, Lacroix LM, and Escoffier W

Abstract

Electrical and structural characterization studies of nano-particles are very important steps to determine their potential applications in microelectronics. In this paper, we address the crystallographic and electric transport properties of soft-chemistry-grown nanometric Pt tribranches. We report that Pt nanostars grown from the reduction of H 2 PtCl 6 salt in pure oleylamine present a remarkable crystalline structure and deeply metallic character despite being grown under mild conditions. We demonstrate that such devices are able to operate at current densities surpassing 200 MA cm -2 , actuating as highly compact frequency multiplexers in the non-ohmic regime.

Published
2017
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42. Direct patterning of nanoparticles and biomolecules by liquid nanodispensing.

Author

Fabié L, Agostini P, Stopel M, Blum C, Lassagne B, Subramaniam V, and Ondarçuhu T

Subjects
Microscopy, Atomic Force, Nanoparticles ultrastructure, Green Fluorescent Proteins chemistry, Nanoparticles chemistry
Abstract

We report on the localized deposition of nanoparticles and proteins, nano-objects commonly used in many nanodevices, by the liquid nanodispensing (NADIS) technique which consists in depositing droplets of a solution through a nanochannel drilled at the apex of an AFM tip. We demonstrate that the size of spots can be adjusted from microns down to sub-50 nm by tuning the channel diameter, independently of the chemical nature of the solute. In the case of nanoparticles, we demonstrated the ultimate limit of the method and showed that large arrays of single (or pairs of) nanoparticles can be reproducibly deposited. We further explored the possibility to deposit different visible fluorescent proteins using NADIS without loss of protein function. The intrinsic fluorescence of these proteins is characteristic of their structural integrity; the retention of fluorescence after NADIS deposition demonstrates that the proteins are intact and functional. This study demonstrates that NADIS can be a viable alternative to other scanning probe lithography techniques since it combines high resolution direct writing of nanoparticles or biomolecules with the versatility of liquid lithography techniques.

Published
2015
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43. Coupling mechanics to charge transport in carbon nanotube mechanical resonators.

Author

Lassagne B, Tarakanov Y, Kinaret J, Garcia-Sanchez D, and Bachtold A

Abstract

Nanoelectromechanical resonators have potential applications in sensing, cooling, and mechanical signal processing. An important parameter in these systems is the strength of coupling the resonator motion to charge transport through the device. We investigated the mechanical oscillations of a suspended single-walled carbon nanotube that also acts as a single-electron transistor. The coupling of the mechanical and the charge degrees of freedom is strikingly strong as well as widely tunable (the associated damping rate is approximately 3 x 10(6) Hz). In particular, the coupling is strong enough to drive the oscillations in the nonlinear regime.

Published
2009
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44. Onset of landau-level formation in carbon-nanotube-based electronic Fabry-Perot resonators.

Author

Raquet B, Avriller R, Lassagne B, Nanot S, Escoffier W, Broto JM, and Roche S

Abstract

We report on the onset of Landau-level formation in a carbon nanotube-based Fabry-Perot resonator. Supported by excellent agreement between calculated and measured magnetoconductance patterns, the applied perpendicular magnetic field is shown to modulate the Fabry-Perot conductance oscillations consistently with the formation of a Landau level in the 1D massless Dirac fermions particle excitations.

Published
2008
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