Fig. 3
From: Inflating hollow nanocrystals through a repeated Kirkendall cavitation process
TEM and HRTEM images of hollow Pd hollow nanocrystals obtained with varied molar ratios of N2:O2: a 90:10, b 85:15, c 75:25, d 70:30, e 60:40, f 40:60, g 20:80, h 0:100. Scale bars are 20 nm. Scale bars in the insets are 5 nm
