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- W2228271399 abstract "High aspect ratio, rod-like and single crystal phase GaAs nanowires (NWs) were grown by gold catalyst-assisted hydride vapor phase epitaxy (HVPE). High resolution transmission electron microscopy (HRTEM) and micro-Raman spectroscopy revealed polytypism-free zinc blende NWs over lengths of several tens of micrometers for diameters ranging between 50 and 150 nm. Micro-photoluminescence studies of individual NWs showed linewidths smaller than those reported elsewhere which is consistent with the crystalline quality of the NWs. HVPE makes use of chloride growth precursors of which high decomposition frequency, after adsorption onto the catalyst particle, favors a direct and rapid introduction of the Ga atoms from the vapor phase into the catalyst liquid droplet. This yields high axial growth rate (more than 100 micron/h) of NWs. The fast diffusion of the Ga atoms in the droplet towards the interface between the liquid and the solid nanowire was investigated by using density functional theory calculations. The diffusion coefficient of Ga atoms was estimated to be 3x10-9 m2/s, which matches the experimental observations." @default.
- W2228271399 created "2016-06-24" @default.
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- W2228271399 date "2013-10-17" @default.
- W2228271399 modified "2023-10-17" @default.
- W2228271399 title "VLS-HVPE growth of ultra-long and defect-free GaAs nanowires investigated by ab initio simulation coupled to near-field microscopy" @default.
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- W2228271399 doi "https://doi.org/10.48550/arxiv.1310.4855" @default.
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