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Copper deposition on TiO2 from copper(II)hexafluoroacetylacetonate

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Rayner, D. G., Mulley, J. S. and Bennett, R. A. (2013) Copper deposition on TiO2 from copper(II)hexafluoroacetylacetonate. Journal of Vacuum Science and Technology A, 31 (1). 01A121 . ISSN 1520-8559

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To link to this article DOI: 10.1116/1.4765644

Abstract/Summary

The authors have studied the adsorption of CuII(hfac)2 on the surface of a model oxide system, TiO2(110), and probed the molecular stability with respect to thermal cycling, using atomic scale imaging by scanning tunneling microscopy supported by x-ray photoemission spectroscopy. They find that at 473 K, the adsorbed metal-organic molecules begin to dissociate and release Cu atoms which aggregate and form Cu nanoparticles. These Cu nanoparticles ripen over time and the size (height) distribution develops into a bimodal distribution. Unlike other organometallic systems, which show a bimodal distribution due to enhanced nucleation or growth at surface step edges, the nanoparticles do not preferentially form at steps. The reduced mobility of the Cu islands may be related to the co-adsorbed ligands that remain in very small clusters on the surface.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:29769
Publisher:American Vacuum Society

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