期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 597, 期 -, 页码 72-78出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.01.214
关键词
GaN nanocones; Young's modulus; Size-scale effects; In situ transmission electron microscopy (TEM); Compression
资金
- National Science Council of Taiwan [NSC 100-2221-E-151-018-MY3, NSC 100-2628-E-151-003-MY3]
Mechanical property measurements of single nanocones are challenging because the small scale of the nanostructures. In this study, critical-stress- and strain-induced structural variations of GaN nanocones are estimated using in situ transmission electron microscopy (TEM) compression experiments. For single GaN nanocones with a diameter of 100-350 nm, the Young's modulus, plastic deformation energy (W-p), and elastic deformation energy (W-e) values were 190-290 GPa, 0.02-1.65 x 10(-11) J, and 0.0-43.85 x 10(-11) J, respectively. Raman spectra were used to measure GaN indentation. The E-2 peak was red-shifted, indicated increased compressive stress in the indented area. (C) 2014 Elsevier B.V. All rights reserved.
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