Journal
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
Volume 7, Issue 10, Pages 699-712Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.201307237
Keywords
GaN; nanowires; plasma-assisted molecular beam epitaxy
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GaN nanowires, also called nanocolumns, have emerged over the last decade as promising nanosized building blocks for a wide variety of optoelectronic devices. In contrast to other III-V semiconductors, GaN nanowires have the ability to grow catalyst-free within the self-induced approach by plasma-assisted molecular beam epitaxy, which does not require the use of any foreign materials or patterned substrate. The self-induced growth has accordingly been considered as a valuable growth mode to form GaN nanowires on a wide number of substrates such as Si, Al2O3, diamond or SiC. The formation mechanisms have extensively been investigated and are specifically reviewed here from the very onset of the nucleation phase through the elongation phase to the coalescence process. A general approach of the self-induced growth of GaN nanowires is gained. ((c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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