S Cammelli et al 2009 J. Phys.: Conf. Ser. 190 012027 doi:10.1088/1742-6596/190/1/012027
S Cammelli1,2, D Lützenkirchen-Hecht2, C Degueldre1, J Bertsch1 and R Frahm2
Show affiliationsEXAFS is an important experimental technique for determining the local atomic structure of nanoclusters embedded in a bulk material. In practical cases, nanocluster samples do not contain homogeneous clusters of just one size, and the average cluster size is strongly influenced by the specific distribution of cluster sizes. Combinations of different cluster sizes might provide very similar results; this issue is called polydispersity. The goal of this study is to understand if there are any principal limitations for EXAFS studies related to polydispersity. Here a new approach based on EXAFS simulations followed by linear combination (LC) on EXAFS spectra is presented. The simulations were performed on pure Cu and binary Cu-Fe clusters. The main result of this study concerns the proof that polydispersity does not affect XAFS studies on nano-clusters within a size of up to 140 atoms.
78.70.Dm X-ray absorption spectra
78.67.-n Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Issue 1 (2009)
S Cammelli et al 2009 J. Phys.: Conf. Ser. 190 012027
I S Rodina et al 2009 J. Phys.: Conf. Ser. 190 012181
Cécile Monthus and Thomas Garel 2008 J. Phys. A: Math. Theor. 41 375005
Van Thanh Dau et al 2009 J. Micromech. Microeng. 19 125016
Michele Castellana and Giovanni Montani 2008 Class. Quantum Grav. 25 105018
Emiel de Smit et al 2009 J. Phys.: Conf. Ser. 190 012161
S Mattiello and W Cassing 2009 J. Phys. G: Nucl. Part. Phys. 36 125003
Fumihiko Matsui et al 2009 J. Phys.: Conf. Ser. 190 012111
C C Silva et al 2009 Phys. Scr. 80 055706
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