Figure14
![EXAFS spectroscopy: a powerful tool for the study of local vibrational dynamics](https://image.oaes.cc/f5e4ed23-8b45-4202-bf90-5b1619bbf1c6/4313.fig.14.jpg)
Figure 14. EXAFS Debye-Waller factor measured as a function of temperature in Ge nanocrystals (circles), bulk crystalline Ge (squares and down-triangles) and amorphous Ge (right-triangles), with the respective correlated Einstein model fits (dashed lines). The solid line is the Ge-Ge dynamic contribution in c-Ge from ab initio calculations[93]. The reduced slope of Debye-Waller for Ge NCs means that the Ge-Ge bonds in Ge NCs are stiffer than crystalline and amorphous Ge. Moreover, Ge-Ge static disorder is observed in Ge NCs, lying between that of c-Ge and a-Ge. Figure taken from Ref.[89]. © APS Publishing. Reproduced with permission. All rights reserved.