Fabrication and gas sensitivity of poly-2,5-dimethoxyethynylbenzene/SnO2 nanocomposite

Ping Sun; Yadong Jiang; Guangzhong Xie; Junsheng Yu; Ying Yu; Jia Hu

doi:10.1117/12.832095

18 May 2009 Fabrication and gas sensitivity of poly-2,5-dimethoxyethynylbenzene/SnO₂ nanocomposite

Ping Sun, Yadong Jiang, Guangzhong Xie, Junsheng Yu, Ying Yu, Jia Hu

Proceedings Volume 7284, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems; 728410 (2009) https://doi.org/10.1117/12.832095
Event: AOMATT 2008 - 4th International Symposium on Advanced Optical Manufacturing, 2008, Chengdu, Chengdu, China

Abstract

this paper, the poly-yne poly-2,5-dimethoxyethynylbenzene/SnO₂ nanocomposite is in-situ synthesized as gas sensing materials. The composite is accessed by two procedures both relying on Pd catalysis: (1) The reaction of ethynyltri-n-buyltin replacing Br belonged to 1,4-dibromo-2,5-dimethoxy benzene, and (2) The step-growth polymerization of PDMEB through heating up the mixer, at the same time adding appropriate SnO₂ nanoparticle. The materials are characterized by FT-IR and the morphology of films is characterized by laser scanning confocal microscope (LSCM). Compared with pure PDMEB, it clearly appears that SnO₂ components influence morphology of the nanocomposite film, which leads to variation of sensor response-recovery behavior. The poly-ynes nanocomposite is deposited on quartz crystal microbalance (QCM, whose corresponding operation frequency of baseline is 8.0MHz) to fabricate a gas sensor by drop-coating method. The PDMEB/SnO2 based QCM gas sensor has been investigated towards methane (CH₄, in the range of 500-5000 ppm) gas. The sensor is exposed to various concentrations of CH₄ gas and operated at room temperature. The frequency shift as the response of PDMEB/SnO₂ based QCM gas sensor is charaterized. A fast response and recovery with good repeatability in a stable baseline condition is observed.

Citation Download Citation

Ping Sun, Yadong Jiang, Guangzhong Xie, Junsheng Yu, Ying Yu, and Jia Hu "Fabrication and gas sensitivity of poly-2,5-dimethoxyethynylbenzene/SnO₂ nanocomposite", Proc. SPIE 7284, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, 728410 (18 May 2009); https://doi.org/10.1117/12.832095

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