Layer-by-layer deposition of praseodymium oxide on tin-doped indium oxide (ITO) surface

被引：7
作者：
Shrestha, S.
Yeung, C. M. Y.
Marken, F.
Mills, C. E.
Tsang, S. C. [1 ]
机构：
[1] Univ Reading, Sch Chem, Surface & Catalysis Res Ctr, Reading RG6 6AD, Berks, England
[2] Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England
[3] Smiths Detect, Watford WD23 2BW, Herts, England
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2007年 / 123卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
chemical deposition; praseodymium; oxide; layer-by-layer; chitosan; indium doped tin oxide; conductivity; sensor material;
D O I：
10.1016/j.snb.2006.09.008
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Praseodymium oxide as a thin film of controllable layer is known to display many unique physiochemical properties, which can be useful to ceramic, semiconductive and sensor industries. Here in this short paper, we describe a new chemical method of depositing praseodymium oxide on tin-doped indium oxide (ITO) surface using a layer-by-layer approach. The process is carried out by dipping the ITO in solutions of adsorbable polycationic chitosan and alkaline praseodymium hydroxide Pr(OH)(3) alternatively in order to build up the well-defined multi-layers. XRD suggests that the predominant form of the oxide is Pr6O11, obtained after heat treatment of the deposited ITO in static air at 500 degrees C. Microscopic studies including AFM, TEM and SEM indicate that the deposited oxide particles are uniform in size and shape (cylindrical), mesoporous and the thickness of the film can be controlled. AC impedance measurements of the deposited materials also reveal that the oxide layers display a high electrical conductivity hence suitable for sensor uses. (c) 2006 Elsevier B.V. All rights reserved.
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收藏
页码：400 / 406
页数：7
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