Figure 4 .
TEM characteristics of nanowires. Low-magnification TEM images of the nanowires grown with the Ga source at (a) 15- and (b) 20-cm distances. The insets in (a) and (b) are diffraction patterns of the nanowires in (a) and (b), respectively.
Hou et al. Nanoscale Research Letters 2012 7:373 doi:10.1186/1556-276X-7-373