Figure 4 .
TEM images showing Pt nanocrystals deposited on surface of Ag wires with different reaction times. Different reaction times at 170°C, (a) 1 h, (b) 2 h, and (c) 3 h, as well as the SAED patterns of Ag core and Pt shell.
Shen et al. Nanoscale Research Letters 2012 7:245 doi:10.1186/1556-276X-7-245