Study of a QCM Dimethyl Methylphosphonate Sensor Based on a ZnO-Modified Nanowire-Structured Manganese Dioxide Film

Sensors

Zhifu Pei¹  Xingfa Ma³  Pengfei Ding¹  Wuming Zhang¹  Zhiyuan Luo² 

[1] National Key Laboratory of Industrial Control Technology, Department of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China; E-Mails:;Computer Learning Research Centre, Royal Holloway, University of London, Egham, Surrey TW20 0EX, UK; E-Mail:;State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China; E-Mail:

关键词: quartz crystal microbalance;    gas sensor;    volatile organic vapor;    DMMP;    nanowire;    manganese dioxide;    zinc oxide;   

DOI  :  10.3390/s100908275

来源: mdpi

【 摘 要 】

Sensitive, selective and fast detection of chemical warfare agents is necessary for anti-terrorism purposes. In our search for functional materials sensitive to dimethyl methylphosphonate (DMMP), a simulant of sarin and other toxic organophosphorus compounds, we found that zinc oxide (ZnO) modification potentially enhances the absorption of DMMP on a manganese dioxide (MnO₂) surface. The adsorption behavior of DMMP was evaluated through the detection of tiny organophosphonate compounds with quartz crystal microbalance (QCM) sensors coated with ZnO-modified MnO₂ nanofibers and pure MnO₂ nanofibers. Experimental results indicated that the QCM sensor coated with ZnO-modified nanostructured MnO₂ film exhibited much higher sensitivity and better selectivity in comparison with the one coated with pure MnO₂ nanofiber film. Therefore, the DMMP sensor developed with this composite nanostructured material should possess excellent selectivity and reasonable sensitivity towards the tiny gaseous DMMP species.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.