Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (02): 502-506.doi: 10.3866/PKU.WHXB20100139

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

Patterning of TiO2 Thin Films Prepared from Aqueous Solutions

LIANG Shan, XUE Qun-Ji, CUI Yu-Hong, ZHAO Zhan-Fen   

  1. College of Science, Tianjin University of Science and Technology, Tianjin 300457, P. R. China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
  • Received:2009-08-27 Revised:2009-10-26 Published:2010-01-26
  • Contact: LIANG Shan E-mail:liangshan@tust.edu.cn

Abstract:

TiO2 thin films were patterned froman aqueous solution containing Ti(SO4)2 by chemical bath deposition and electrochemical deposition methods. Two titanium precursors were prepared, a titanium sulfate solution (pH=1.0) and a peroxotitanium sulfate solution (pH=1.6), and these solutions were stabilized by sulfuric acid and hydrogen peroxide, respectively. Pre-patterned self-assembled monolayers (SAMs) were micro-contact printed on silicon substrates and were then immersed in the chemical bath for deposition to obtain the ordered TiO2 patterns. The inorganic ligands affect the solution stability and the crystallinity of the TiO2 films. The aqueous acidity affected the quality of the patterned films. A peroxotitanium sulfate solution was also used for patterning on the conductive glass of indium tin oxide by electrodeposition. The photoresist was ready for deposition after spin-coating, exposure, and development. Finally, clear patterns with a height of 200 nmwere fabricated by controlling the cathode potential.

Key words: TiO2, Titaniumsulfate, Peroxotitaniumsulfate, Patterning, Chemical bath deposition, Eletrodeposition

MSC2000: 

  • O647