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Bioinorganic Chemistry and Applications
Volume 2011, Article ID 853048, 5 pages
Research Article

Structure and Properties of - Nanocomposite Films for Biomedical Applications

1Information College, ZhongKai University of Agriculture and Engineering, Guangzhou 510225, China
2Department of Endocrinology, Guangzhou Panyu Central Hospital, Guangzhou 511400, China

Received 29 June 2011; Revised 5 August 2011; Accepted 29 August 2011

Academic Editor: Giovanni Natile

Copyright © 2011 Lin Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The hemocompatibility of La2O3-doped TiO2 films with different concentration prepared by radio frequency (RF) sputtering was studied. The microstructures and blood compatibility of TiO2 films were investigated by scan electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV-visible optical absorption spectroscopy, respectively. With the increasing of the La2O3 concentrations, the TiO2 films become smooth, and the grain size becomes smaller. Meanwhile, the band gap of the samples increases from 2.85 to 3.3 eV with increasing of the La2O3 content in TiO2 films from 0 to 3.64%. La2O3-doped TiO2 films exhibit n-type semiconductor properties due to the existence of Ti2+ and Ti3+. The mechanism of hemocompatibility of TiO2 film doped with La2O3 was analyzed and discussed.