TITLE

Abnormal pressure-induced structural transformations of gallium nitride nanowires

AUTHOR(S)
Zhaohui Dong; Yang Song
PUB. DATE
April 2010
SOURCE
Applied Physics Letters;4/12/2010, Vol. 96 Issue 15, p151903
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
One-dimensional nanostructured GaN was studied at pressures up to 65 GPa by in situ synchrotron x-ray diffraction. A wurtzite-to-rocksalt transformation was observed at ∼55 GPa, an onset pressure higher than that for bulk GaN, but lower than that for nanocrystalline GaN. Such transformation was found extremely incomplete even at the highest pressure but was facilitated by decompression. In addition, GaN nanowires exhibited drastically different volume responses to compression than did GaN in other forms. These unusual pressure behaviors of GaN nanowires are attributed to the interplay of several factors involving the intrinsic nanoproperties and the compression conditions.
ACCESSION #
49193347

 

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