Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/43826
標題: Characterization of electrolytic TiO2 coating on Ti for biomedical applications
作者: Lin, C.M.
顏秀崗
Yen, S.K.
關鍵字: titanium-oxide films;dioxide thin-films;deposition;implants;cells
Project: Journal of the Electrochemical Society
期刊/報告no:: Journal of the Electrochemical Society, Volume 151, Issue 12, Page(s) D127-D133.
摘要: 
The cathodic reactions of electrolytic nanocrystalline TiO2 coating on pure titanium were investigated by polarization tests in TiCl4 alcoholic and HCl aqueous solutions, respectively. Three major reactions which belong to various applied voltage ranges were identified: (i) O-2 + 4H(+) + 4e(-) --> 2H(2)O, from -0.1 to -0.3 V (Ag/AgCl), (ii) 2H(+) + 2e(-) --> H-2, from -0.3 to -0.9 V, and (iii) 2H(2)O + 2e(-) --> H-2 + 2OH(-), from -0.9 to -2.5 V. Excellent deposition was located at the third stage, because H+ ions were depleted and many more OH- ions were provided to form TiO(OH)(2).H2O on the cathodic surface. The coated films were further characterized by thermogravimetric differential thermal analysis, X-ray diffraction, X-ray photoelectron spectrometer, scanning electron microscopy, atomic force microscopy, dynamic cyclic polarization, and cell bioactivity assay. After being annealed at 300degreesC for 1 h, the coated films were further condensed into anatase TiO2, and gradually transformed into rutile TiO2 at 500degreesC. From cross section, the TiO2 coated film similar to1.2 mum thick revealed excellent adhesion with substrate. Compared with thermally grown oxide TiO2 film, much better bioactivity and more corrosion resistance were found on the electrolytic TiO2 coated specimens. (C) 2004 The Electrochemical Society.
URI: http://hdl.handle.net/11455/43826
ISSN: 0013-4651
DOI: 10.1149/1.1813751
Appears in Collections:材料科學與工程學系

Show full item record
 

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.