Surface acoustic wave humidity sensors based on poly (p-diethynylbenzene) and sodium poly sulfone sulfonate

被引：23

作者：

Li, Yang ^{[1
]}

Yang, Mujie

Ling, Mingfang

Zhu, Yunhai

机构：

[1] Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Dept Elect & Informat, Hangzhou 310027, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2007年 / 122卷 / 02期

关键词：

poly(p-diethynylbenzene); sodium polysulfonesulfonate; surface acoustic wave; humidity sensor;

D O I：

10.1016/j.snb.2006.06.031

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Surface acoustic wave (SAW) humidity sensors have been constructed by using poly(p-diethynylbenzene) (PDEB) and sodium polysulfone-sulfonate (NaSPF) as the sensitive film. The 138 MHz SAW sensors were configured as a delay line onto a 128 degrees YX-LiNbO3 substrate with the SAW path covered by the LB membrane of PDEB and the spin-coated NaSPF film. The frequency responses of the SAW sensors have been investigated over the range of relative humidity (RH) of 20-85% at different temperatures. It is found that the temperature has a great influence on the frequency shift of the SAW sensors. The PDEB and NaSPF based SAW sensors exhibit a decreased frequency with an increase in humidity, and the sensitivity is found to be -0.4 and -1.1 kHz/%RH, respectively. The effect of chemical structure on the sensing characteristics has also been discussed. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：560 / 563

页数：4

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