Dynamic Structure of Metal Nanoclusters from Synchrotron X-ray Spectroscopy
Zhifeng Zhang, Andrew G. Walsh, Peng Zhang
Abstract
The structural evolution mechanism and the structure–property relationship of metal nanoclusters (MNCs) in variable environments are critical for their potential applications. Herein, we present a perspective regarding the dynamic structure of MNCs as uncovered by synchrotron X-ray absorption spectroscopy (XAS) and its impact on their properties. Unique XAS techniques including solution-phase measurements, wavelet-transformed mapping, and its combined use with theoretical calculations are illustrated as useful tools to capture the structural and property changes of MNCs in differing conditions. Some key findings concerning the structures and properties of several representative MNCs such as Au18(SR)14, Ag44(SR)30, and protein-protected Au MNCs are discussed. Finally, future perspectives for the challenges and more advanced structural analyses of these materials are presented.