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Humidity sensor based on PMMA simultaneously doped with two different salts

被引：68
作者：
Su, PG
Sun, YL
Lin, CC
机构：
[1] Changchou Inst Technol, Gen Educ Ctr, Yualin Township 510, Changhua County, Taiwan
[2] Natl Chung Hsing Univ, Dept Chem, Taichung 402, Taiwan
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2006年 / 113卷 / 02期
关键词：
humidity sensor; PMMA; KOH; K2CO3; co-doping; sensitivity and linearity;
D O I：
10.1016/j.snb.2005.03.052
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The humidity-sensing properties of poly(methyl methacrylate) (PMMA) were enhanced by doping with two alkali salts (KOH and K2CO3), whose dissociation constants were distinctly different from each other. The electrical properties of PMMA doped with different amounts of KOH or a mixture of KOH and K2CO3 were examined in detail as a function of relative humidity (RH), to elucidate the contribution of the salts to the sensing properties (linearity and sensitivity). The PMMA doped only with KOH had a high sensitivity but low linearity. The poor linearity of the PMMA/KOH complex was improved by further doping of K2CO3. The PMMA doped with a mixture of KOH (0.6%, w/w) and K2CO3 (0.6%, w/w) was optimal in both sensitivity and linearity in the range of 30-90%RH. (c) 2005 Elsevier B.V. All rights reserved.
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页码：883 / 886
页数：4
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