Small copper clusters studied by x-ray absorption near-edge structure.

Authors :: Oyanagi, H.
Sun, Z. H.
Jiang, Y.
Uehara, M.
Nakamura, H.
Yamashita, K.
Orimoto, Y.
Zhang, L.
Lee, C.
Fukano, A.
Maeda, H.
Source :: Journal of Applied Physics. Apr2012, Vol. 111 Issue 8, p084315. 4p. 3 Graphs.
Publication Year :: 2012
Abstract: The local structure of copper nanoparticles grown in organic solution by reducing Cu(II) hexafluoroacetylacetonate [Cu(hfac)2] was studied as-grown by the Cu K-edge x-ray absorption near-edge structure (XANES). Comparison of the experimental XANES spectra with reference materials indicated small copper clusters are formed by ligand-exchange with oleylamine and subsequent reducing by diphenylsilane. The multiple-scattering (MS) calculation for various model clusters consisting of 13-135 atoms suggests that small (13-19 atom) Cu clusters are stabilized without a large deformation. [ABSTRACT FROM AUTHOR]