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Your search keyword '"Bosseboeuf A"' showing total 15 results
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15 results on '"Bosseboeuf A"'

1. One mode-model in nanostructures with inclined sidewalls applied to nano Fabry-Perot structures

Author

Lackner Jules, Fix Baptiste, Bosseboeuf Alain, and Bouchon Patrick

Subjects
Physics, QC1-999
Abstract

Metasurfaces are engineered with specific shapes and sizes to interact with light in a unique way. By manipulating the design of the metasurface, it is possible to control optical properties of the surface such as its thermal emissivity. However, thin layers patterning techniques can lead to side-wall angles, thus modifying light propagation within the structure. Here, we introduce a one-mode model that fairly describes the propagation of light in structures with inclined sidewalls. We applied this method to two families of plasmonics resonators: nano Fabry-Perot and coupled nano Fabry-Perot with refractory materials ZrC and tungsten.

Published
2023
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2. In situ measurements of thermal and pressure dependent stress in SOG films by phase shifting interferometry

Author

T.M. van den Berg, A. Bosseboeuf, P. Coste, and L. Vincent

Subjects
Spin-on-glass, Phase shifting interferometry, Thermal densification, In situ stress measurement, Electronics, TK7800-8360, Technology (General), T1-995
Abstract

Hydrogen silsesquioxane (HSQ) and Medusa are spin-on-glasses used for several applications and more specifically for electron-beam lithography. To characterize the thermal densification of these resists on silicon, the mean resist film stress was measured in situ as function of temperature up to 600 °C in a vacuum chamber by the curvature method. The curvature was evaluated from 3D profiles of uncoated and coated dies measured by full field phase shifting interferometry. Three resists were investigated: FOx-15, FOx-25 and Medusa-82. The initial resist stress at room temperature after spin coating and baking is slightly tensile and becomes highly tensile above a certain temperature dependent on the resist. This variation is mainly attributed to resists densification. FOx-15 and FOx-25 start densifying at 500 °C, and FOx-25 densifies more than FOx-15. Medusa-82 is densifying around 300 °C and has the highest tensile stress but the film relaxes beyond 405 °C. In the case of FOx-15, it was found that vacuum annealing prevents densification. Finally, we evaluated the in-plane average coefficient of thermal expansion of the resists from stress measurements during cooling to room temperature. For FOx-15, a CTE equal to 1.5 ppm/K is found, while it is close to 0.0±0.2 ppm/K for FOx-25 and 1.3 ppm/K for Medusa-82.

Published
2024
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4. Hydrogen sorption in yttrium-based getter thin films

Author

Kutyla, Charlotte, Bessouet, Clément, Lemettre, Sylvain, Leroy, Laetitia, Bosseboeuf, Alain, Coste, Philippe, Sauvage, Thierry, Wendling, Olivier, Bellamy, Aurélien, Jagtap, Piyush, Escoubas, Stéphanie, Guichet, Christophe, Thomas, Olivier, and Moulin, Johan

Published
2023
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6. Zr-V getter films for MEMS packaging

Author

Lemettre, Sylvain, primary, Bessouet, Clément, additional, Kutyla, Charlotte, additional, Bosseboeuf, Alain, additional, Coste, Philippe, additional, Sauvage, Thierry, additional, Lecoq, Hélène, additional, Wendling, Olivier, additional, Bellamy, Aurélien, additional, and Moulin, Johan, additional

Published
2023
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8. Neuropilin-1 interacts with VE-cadherin and TGFBR2 to stabilize adherens junctions and prevent activation of endothelium under flow

Author

Bosseboeuf, Emy, primary, Chikh, Anissa, additional, Chaker, Ahmed Bey, additional, Mitchell, Tom P., additional, Vignaraja, Dhilakshani, additional, Rajendrakumar, Ridhi, additional, Khambata, Rayomand S., additional, Nightingale, Thomas D., additional, Mason, Justin C., additional, Randi, Anna M., additional, Ahluwalia, Amrita, additional, and Raimondi, Claudio, additional

Published
2023
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9. Neuropilin-1 interacts with VE-cadherin and TGFBR2 to stabilize adherens junctions and prevent activation of endothelium under flow

Author

Emy Bosseboeuf, Anissa Chikh, Ahmed Bey Chaker, Tom P. Mitchell, Dhilakshani Vignaraja, Ridhi Rajendrakumar, Rayomand S. Khambata, Thomas D. Nightingale, Justin C. Mason, Anna M. Randi, Amrita Ahluwalia, and Claudio Raimondi

Subjects
Cell Biology, Molecular Biology, Biochemistry
Abstract

Linear and disturbed flow differentially regulate gene expression, with disturbed flow priming endothelial cells (ECs) for a proinflammatory, atheroprone expression profile and phenotype. Here, we investigated the role of the transmembrane protein neuropilin-1 (NRP1) in ECs exposed to flow using cultured ECs, mice with an endothelium-specific knockout of NRP1, and a mouse model of atherosclerosis. We demonstrated that NRP1 was a constituent of adherens junctions that interacted with VE-cadherin and promoted its association with p120 catenin, stabilizing adherens junctions and inducing cytoskeletal remodeling in alignment with the direction of flow. We also showed that NRP1 interacted with transforming growth factor–β (TGF-β) receptor II (TGFBR2) and reduced the plasma membrane localization of TGFBR2 and TGF-β signaling. NRP1 knockdown increased the abundance of proinflammatory cytokines and adhesion molecules, resulting in increased leukocyte rolling and atherosclerotic plaque size. These findings describe a role for NRP1 in promoting endothelial function and reveal a mechanism by which NRP1 reduction in ECs may contribute to vascular disease by modulating adherens junction signaling and promoting TGF-β signaling and inflammation.

Published
2023
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11. Activation of getter films for MEMS packaging studied by in situ NRA

Author

Bessouet, Clément, Bejjit, Charaf-Eddine, Kutyla, Charlotte, Lemettre, Sylvain, Bosseboeuf, Alain, Coste, Philippe, Sauvage, Thierry, Wendling, Olivier, Bellamy, Aurelien, Jagtap, Pratik, Escoubas, Stephanie, Guichet, Christophe, Thomas, Olivier, Moulin, Johan, Centre de Nanosciences et de Nanotechnologies (C2N), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), and Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI]Engineering Sciences [physics]
Abstract

International audience

Published
2022

12. Oxygen and hydrogen sorption in thermally activated yttrium-based getter thin films for MEMS vacuum packaging

Author

Charlotte Kutyla, Sylvain Lemettre, Clement Bessouet, Alain Bosseboeuf, Philippe Coste, Thierry Sauvage, Olivier Wendling, Aurelien Bellamy, Piyush Jagtap, Stephanie Escoubas, Christophe Guichet, Olivier Thomas, Johan Moulin, Centre de Nanosciences et de Nanotechnologies (C2N), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), and Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI]Engineering Sciences [physics], Yttrium alloys, thin films, oxidation, getter, lowtemperature bonding
Abstract

International audience; Many microsensors need to operate in medium vacuum, which is obtained by low temperature vacuum packaging integrating a getter film. By a thermal activation during the sealing process, the getter film aims to compensate the outgassing of the inner surfaces of the micro-cavity and also leaks after sealing. Thin films of getter alloys were coevaporated under ultra-high vacuum on silicon wafers. They were activated by annealing at temperatures ranging from 225 °C to 400 °C, during one hour under Argon atmosphere with traces of oxidizing species. Three complementary ion beam analysis techniques were performed to obtain depth profiles and to quantify the number of atoms of the different gaseous species absorbed by the getter films: Rutherford Backscattering Spectrometry (RBS), Nuclear Reaction Analysis (NRA) and Elastic Recoil Detection Analysis (ERDA). The results show that both oxygen and hydrogen diffuse inside the getter films. However, hydrogen tends to accumulate near the interface between film and substrate and starts to diffuse inside substrate as well. We demonstrated that the sorption of hydrogen by an yttrium-based getter film is tailored by its composition and depends on its degree of oxidation.

Published
2022
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14. Oxygen and hydrogen sorption in thermally activated yttrium-based getter thin films for MEMS vacuum packaging

Author

Kutyla, Charlotte, primary, Lemettre, Sylvain, additional, Bessouet, Clement, additional, Bosseboeuf, Alain, additional, Coste, Philippe, additional, Sauvage, Thierry, additional, Wendling, Olivier, additional, Bellamy, Aurelien, additional, Jagtap, Piyush, additional, Escoubas, Stephanie, additional, Guichet, Christophe, additional, Thomas, Olivier, additional, and Moulin, Johan, additional

Published
2022
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