Quantitatively in Situ Imaging Silver Nanowire Hollowing Kinetics.
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 × 10-13cm2/s from the geometrical parameters extracted from the TXM images.
School of Electronic Science and Engineering, Nanjing University , Nanjing, Jiangsu 210093, China.|Department of Physics, Bryn Mawr College , Bryn Mawr, Pennsylvania 19010, United States.
Le
L
Yu
Department of Physics, Bryn Mawr College , Bryn Mawr, Pennsylvania 19010, United States.
Zhongying
Z
Yan
X-ray Science Division, Advanced Photon Source, Argonne National Laboratory , Argonne, Illinois 60439, United States.
Zhonghou
Z
Cai
Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States.
Dongtang
D
Zhang
School of Electronic Science and Engineering, Nanjing University , Nanjing, Jiangsu 210093, China.
Ping
P
Han
Department of Physics, Bryn Mawr College , Bryn Mawr, Pennsylvania 19010, United States.
Xuemei
X
Cheng
Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States.
Yugang
Y
Sun
Kirkendall effect; diffusion coefficient; nanotubes; silver nanowire; transmission X-ray microscopy; void formation