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Theoretical prediction of GaN nanostructure equilibrium and nonequilibrium shapes

J. Appl. Phys. 106, 083115 (2009); doi:10.1063/1.3253575

Published 29 October 2009

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Vibhu Jindal and Fatemeh Shahedipour-Sandvik
College of Nanoscale Science and Engineering, University at Albany, 255 Fuller Road, Albany, New York 12203, USA
A wide variety of nanostructure shapes have been observed for GaN under different growth conditions. These shapes include but are not limited to hexagonal pyramid, prismatic, triangular cross-section nanowires, and arrow-headed shapes. Using Wulff's plot and kinetic Wulff's plot for GaN under thermodynamic equilibrium and under various kinetic conditions, we present a model to theoretically predict and explain these faceted nanostructure shapes. Legendre transformation on Wulff's plot and kinetic Wulff's plot has been extensively utilized to obtain the faceted equilibrium shapes in equilibrium. In addition, equilibrium and nonequilibrium faceted geometry of nanostructures have also been predicted by numerical simulations using level set methods and the proposed kinetic Wulff's plot. ©2009 American Institute of Physics
History: Received 6 August 2009; accepted 8 September 2009; published 29 October 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/083115/1
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KEYWORDS and PACS

Keywords
PACS
  • 61.46.Km
    Structure of nanowires and nanorods
  • 65.80.+n
    Thermal properties of small particles, nanocrystals, nanotubes
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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REFERENCES (17)
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