Size effect on compression properties of GaN nanocones examined using in situ transmission electron microscopy

作者：Kang Shao Hui; Fang Te Hua^*

来源：Journal of Alloys and Compounds, 2014, 597: 72-78.

DOI：10.1016/j.jallcom.2014.01.214

• GaN nanocones
• Young's modulus
• Size-scale effects
• In situ transmission electron microscopy (TEM)
• Compression

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.

• 出版日期2014-6-5