School of Electronic Science and Engineering, Nanjing University , Nanjing, Jiangsu 210093, China.
Department of Physics, Bryn Mawr College , Bryn Mawr, Pennsylvania 19010, United States.
Nano Lett. 2016 Oct 12;16(10):6555-6559. doi: 10.1021/acs.nanolett.6b03218. Epub 2016 Sep 30.
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 cm/s from the geometrical parameters extracted from the TXM images.
我们利用透射 X 射线显微镜（TXM）原位研究了银纳米线到中空氧化银纳米管的形态演变。通过柯肯达尔效应实时捕捉到了复杂的银扩散动力学和空心化过程。进一步的定量 X 射线吸收分析揭示了银在其氧化物纳米壳中的纵向和径向扩散之间的差异。从 TXM 图像中提取的几何参数首次计算出银在其氧化物纳米壳中的扩散系数为 1.2×10cm/s。
