Enhanced photocatalysis, colloidal stability and cytotoxicity of synchrotron X-ray synthesized Au/TiO2 nanoparticles
SCIE
SCOPUS
- Title
- Enhanced photocatalysis, colloidal stability and cytotoxicity of synchrotron X-ray synthesized Au/TiO2 nanoparticles
- Authors
- Liu, CJ; Yang, TY; Wang, CH; Chien, CC; Chen, ST; Wang, CL; Leng, WH; Hwu, Y; Lin, HM; Lee, YC; Cheng, CL; Je, JH; Margaritondo, G
- Date Issued
- 2009-09-15
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- Au/TiO2 nanocomposite particles were synthesized by a method based on intense X-ray irradiation without adding any reducing agent or stabilizer. The nanocomposite exhibits promising photocatalytic and biological properties at physiologically relevant concentration ([Au] = 0.028 mM, [TiO2] = 0.5 mM). The structure and photocatalysis were examined by X-ray diffraction, electron microscopy and ultraviolet-visible spectroscopy demonstrating that gold nanoparticles of 2-5 nm size were successfully deposited on TiO2 nanoparticle surfaces. The nanocomposite exhibited good colloidal stability within a typical cellular environment and was nontoxic to cancer cell according to evaluations under controlled conditions. The Au/TiO2 nanoparticles were also found to enhance the photocatalytic efficiency of UV radiation and even more that of X-ray radiation. In vitro studies indicated that the cell-killing effect under X-ray irradiation is more pronounced with the addition of Au/TiO2 nanoparticles than of bare TiO2 nanoparticles. (C) 2009 Elsevier B.V. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/27795
- DOI
- 10.1016/j.matchemphys.2009.05.030
- ISSN
- 0254-0584
- Article Type
- Article
- Citation
- MATERIALS CHEMISTRY AND PHYSICS, vol. 117, no. 1, page. 74 - 79, 2009-09-15
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