Effect of thickness of platinum catalyst clusters on response of SnO2 thin film sensor for LPG

被引：60
|
作者：
Haridas, Divya [1 ]
Chowdhuri, Arijit [2 ]
Sreenivas, K. [1 ]
Gupta, Vinay [1 ]
机构：
[1] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India
[2] Univ Delhi, Acharya Narendra Dev Coll, New Delhi 110019, India
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2011年 / 153卷 / 01期
关键词：
Gas sensor; Tin oxide; Sputtering; Platinum; LPG; DIOXIDE GAS SENSORS; SPECTROSCOPIC EVIDENCE; PARTICLE-SIZE; SENSITIVITY; OXYGEN; CO;
D O I：
10.1016/j.snb.2010.10.013
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
This paper reports the sensing response characteristics of rf-sputtered SnO2 thin films (90 nm thick) loaded with platinum catalyst cluster of varying thickness (2-20 nm) for LPG detection. The enhanced response (5 x 10(3)) was obtained for 200 ppm LPG with the presence of 10 nm thin and uniformly distributed Pt catalyst clusters on the surface of SnO2 thin film at a relatively low operating temperature (220 degrees C). The high response for LPG is shown to be primarily due to the enhanced catalytic activity for adsorbed oxygen on the surface of SnO2 thin film besides the spill over mechanism at elevated temperature. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：89 / 95
页数：7
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