Preparation and investigation of toluene-sensing properties of polymer/inorganic composite and multi-layer films
In this paper,poly 4-vinylphenol (P4VP)/multi-wall carbon nanotubes (MWNTs) composite film,P4VP/carbon black (CB) composite film and P4VP/MWNTs multi-layer sensitive films prepared using airbrush technology were deposited on interdigitated electrodes to detect tolunene vapor at room temperature.The surface of the composite film was observed under a scanning electron microscope (SEM).It was found that the resistance of the sensor increased after the exposure to toluene vapor and the increased magnitude of the changes had a good linearity with concentrations of toluene.Meanwhile,the P4VP/MWNTs composite film sensor also has a higher sensitivity than P4VP/CB composite film sensor.P4VP/MWNTs three-layer film sensor was fabricated as well.It was estimated that the response time and recovery time of P4VP/MWNTs three-layer films sensor were about 15 s and 20 s,respectively.The sensor responses of S=0.12% at 10mg/m3 toluene vapor for P4VP/MWNTs three-layer films.The results showed that the multi-layer films sensor exhibited a lower detection limit and better sensing properties compared with the sensors based composite film.
Gas sensor Toluene P4VP MWNTs Carbon black Composite film Multi-layer films
Jian Liao Guangzhong Xie Yadong Jiang Tao Zhu Weizhi Li Huiling Tai
School of Optoelectronic Information, State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China(UESTC), Chengdu 610054,China
国际会议
广州
英文
570-573
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）