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Type: Artigo de periódico
Title: Evolution of GaN nanowire morphology during catalyst-induced growth process
Author: Sahoo, P
Dhara, S
Amirthapandian, S
Kamruddin, M
Abstract: We report a very generic methodology to control the crystallographic orientation of GaN nanowires (NWs) in a chemical vapor deposition technique employing a standard vapor-liquid-solid mechanism. Incubation time was considered as a critical parameter to control the nanowire morphology. It was found that nanowires of a particular geometry, such as hexagonal, triangular, wurtzite/zinc-blende biphase, and square shaped forms could be obtained by varying the length of incubation time. The change in the diameter of the nanowires with respect to the size of the catalyst droplet was corroborated by a simple steady state model. Luminescence spectra recorded from the GaN NWs revealed the presence of a dominating wurtzite phase in all the as-grown samples. However, temperature independent behavior of two luminescence peaks, recorded especially from the biphase homostructure, was believed to originate from the radiative recombination of carriers localized at potential fluctuations in the zinc-blende and wurtzite phases discretely.
Country: Inglaterra
Editor: Royal Soc Chemistry
Citation: Journal Of Materials Chemistry C. Royal Soc Chemistry, v. 1, n. 43, n. 7237, n. 7245, 2013.
Rights: aberto
Identifier DOI: 10.1039/c3tc31494d
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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