Quantitatively in Situ Imaging Silver Nanowire Hollowing Kinetics
Authors: Yu, Le; Yan, Zhongying; Cai, Zhonghou; Zhang, Dongtang; Han, Ping; Cheng, Xuemei; Sun, Yugang.
NANO LETTERS, 16 (10):6555-6559; 10.1021/acs.nanolett.6b03218 OCT 2016
Abstract: We report the in situ investigation of the morphological evolution of silver nanowires to hollow silver oxide nanotubes using transmission X-ray microscopy (TXM). Complex silver diffusion kinetics and hollowing process via the Kirkendall effect have been captured in real time. Further quantitative X-ray absorption analysis reveals the difference between the longitudinal and radial diffusions. The diffusion coefficient of silver in its oxide nanoshell is, for the first time, calculated to be 1.2 X 10(-13) cm(2)/s from the geometrical parameters extracted from the TXM images.