Microstructure-controlled deposition of SrTiO3 thin film on self-assembled monolayers in an aqueous solution of (NH4)2TiF6-Sr(NO3)2-H3BO3

被引:56
作者
Gao, YF [1 ]
Masuda, Y [1 ]
Koumoto, K [1 ]
机构
[1] Nagoya Univ, Grad Sch Engn, Dept Appl Chem, Chikusa Ku, Nagoya, Aichi 4648603, Japan
关键词
D O I
10.1021/cm030234s
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Strontium titanate precursor thin films were directly deposited on different self-assembled monolayers (SAM) in an aqueous solution at 40-60 degreesC. We have investigated the film growth rate, mechanism, and kinetics. The film microstructure and thickness can be controlled by appropriate SAM surfaces and solution conditions, such as the concentration of starting materials, pH, and deposition temperatures. Uniform, smooth, and adhesive films with thickness in the range of 25-480 nm could be successfully prepared on the OH surfaces of UV-modified SAM. The films were transparent and composed of closely packed particles of 20-50 nm, which formed by coalescence of very small particles. The Sr species preferably reacts with intermediate Ti species to produce SrTiO3 precursor solid when the Sr and Ti species coexisted in the present solution system, resulting in a stoichiometry in terms of Sr/Ti ratio even if the Ti species was excessive.
引用
收藏
页码:2399 / 2410
页数:12
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