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Synthesis of GaAs nanowires and nanostructures by HVPE on Si substrate. Application to a microbial fuel cell based on GaAs nanowires

Abstract : III-V semiconductor nanowires exhibit excellent electrical and optical properties in laterally confined geometry which is very promising for monolithic integration of photonic nanodevices on silicon substrates. Hydride Vapor Phase Epitaxy (HVPE) process growth was therefore developed in this thesis for the growth of GaAs nanowires. This report is organized into two chapters.The first chapter introduces the state-of-the-art of self-catalyzed GaAs nanowires and nano-structures on silicon substrate. We have demonstrated the growth of self - catalyzed GaAs nanowires by HVPE on un-patterned Si (111) substrates at a low temperature of 600 °C with extremely high GaCl/AsH3 flow ratios. A model that explains well the experimental findings was developed. The second part proposes the design of a Microbial Fuel Cell (MFC) prototype based on GaAs nanowire samples. A MFC prototype based on GaAs nanowire and substrate was developed.
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Zhenning Dong. Synthesis of GaAs nanowires and nanostructures by HVPE on Si substrate. Application to a microbial fuel cell based on GaAs nanowires. Electronics. Université Clermont Auvergne, 2017. English. ⟨NNT : 2017CLFAC091⟩. ⟨tel-01843136⟩

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