학술논문
Synchrotron radiation spectroscopy studies of ultrathin chromium films on titanium dioxide
Document Type
Conference
Author
Source
2009 International Students and Young Scientists Workshop "Photonics and Microsystems" Students and Young Scientists Workshop "Photonics and Microsystems", 2009 International. :64-68 Jun, 2009
Subject
Language
ISSN
1939-4381
Abstract
We investigate the initial interaction of chromium in the sub-ML and ML regime with the surface of titanium dioxide. The reaction at the interface, in which TiO 2 is reduced and forms TiO 2-x , is monitored by electron spectroscopy. This reaction is reflected by appearance of Ti 3+ state. Two chromium components are found already in the first step of growth. One component is assigned to Cr in the 3+ oxidation state, while the other one is assigned to metallic Cr. The reaction at the interface is also reflected by the appearance of two band gap states with a well defined character. With increasing overlayer thickness, the band gap emission develops to that of metallic Cr, but the properties are not bulk-like.