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Electronic structure and surface structure of Cu2S nanorods from polarization dependent X-ray absorption spectroscopy
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2006 (English)In: Journal of Electron Spectroscopy and Related Phenomena, ISSN 0368-2048, Vol. 151, no 1, 64-70 p.Article in journal (Refereed) Published
Abstract [en]

Highly aligned CuS nanorods have been studied by polarization dependent X-ray absorption spectroscopy. In contrast to bulk Cu2S, strong s, p, and d hybridization is found in the nanorods. The polarization dependence shows a predominant d(z2) character of Cu 3d states. Ab initio multiple-scattering calculations confirm the strong hybridization, and reveal that CuS nanorods are grown along the z-axis of chalcocite structure with Cu-7 and Cu-10 sites being the main building blocks. The hybridized absorption peak in the nanorods is shifted towards lower energies for smaller diameter of nanorods, which is attributed to surface reconstruction due to strong Cu-Cu interactions on the Cu-rich surface of the nanorods.

Place, publisher, year, edition, pages
2006. Vol. 151, no 1, 64-70 p.
Keyword [en]
Cu2S nanorods, electronic structure, X-ray spectroscopy, ab initio, multiple-scattering calculations, sulfide nanowire arrays, cdse nanocrystals, crystal-structure, low, chalcocite, particle-size, growth, nanoparticles, state
URN: urn:nbn:se:kth:diva-15478DOI: 10.1016/j.elspec.2005.10.003ISI: 000235683200012ScopusID: 2-s2.0-31444439874OAI: diva2:333519
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Ahuja, Rajeev
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Materials Science and Engineering
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