Highly stable and sensitive humidity sensors based on quartz crystal microbalance coated with bacterial cellulose membrane

被引:65
|
作者
Hu, Weili
Chen, Shiyan
Zhou, Bihui
Liu, Luting
Ding, Bin [1 ,2 ]
Wang, Huaping
机构
[1] Donghua Univ, State Key Lab Modificat Chem Fibers & Polymer Mat, Key Lab High Performance Fiber & Prod,Modern Text, Minist Educ,Coll Mat Sci & Engn,Nanomat Res Ctr, Shanghai 201620, Peoples R China
[2] Donghua Univ, Nanomat Res Ctr, Modern Text Inst, Shanghai 200051, Peoples R China
基金
中国国家自然科学基金;
关键词
Bacterial cellulose; Nanofibrous membrane; Quartz crystal microbalance; Humidity sensors; IN-SITU SYNTHESIS; COMPOSITE-MATERIAL; GAS SENSOR; ELECTROSPUN NANOFIBERS; SENSING PROPERTIES; ZNO NANOTETRAPODS; FILMS; NANOPARTICLES; WIRELESS;
D O I
10.1016/j.snb.2011.07.014
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A novel highly stable and sensitive humidity sensor based on bacterial cellulose (BC) coated quartz crystal microbalance (QCM) has been successfully fabricated. The results showed that the sensors possessed good sensing characteristics by increasing more than two orders of magnitude with increasing relative humidity (RH) from 5 to 97%, and the Log(Delta f) showed good linearity (20-97% RH). The sensitivity of sensors coated with BC membranes was four times higher than that of the corresponding cellulose membranes at 97% RH. In addition, the sensor sensitivity is greatly enhanced by increasing the coating load of the BC membranes with more absorption sites in the sensing membranes. Moreover, the experimental results prove that the resultant sensors exhibited a good reversible behavior and good long term stability. Herein, not only a novel and low-cost humidity sensor material was exploited, but also a new application area for BC nanofibrous membranes was opened up. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:301 / 306
页数:6
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