Quantitatively in Situ Imaging Silver Nanowire Hollowing Kinetics.
basic_science · Level V
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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 × 10<sup>-13</sup> cm<sup>2</sup>/s from the geometrical parameters extracted from the TXM images.