Abstract
This paper reported a multi-wall carbon nanotubes (MWNTs)/polymer film-based sensor for ethanol gas detection. The film sensor was fabricated using layer-by-layer self-assembly method on the substrate with interdigital electrodes structure. The surface morphology of the self-assembled membranes shows a high strength, dense and random network structures, and the electrical properties of MWNTs/polymer film sensor were investigated. Its ethanol gas-sensing properties with varying gas concentration are characterized at room temperature. The experiment results shown that carboxylic groups attached on the MWNTs surface and the expansion of polyelectrolyte interlayer lead to a prompt response and sensitive resistance change when the sensor exposed to ethanol gas, indicating the unique advantages of layer-by-layer self-assembly of MWNTs/polymer film sensors in prospective application.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant No.51205414), the Promotive Research Foundation for the Excellent Middle-Aged and Youth Scientists of Shandong Province of China (Grant No. BS2012DX044), the Science and Technology Development Plan Project of Qingdao (Grant No. 13-1-4-179-jch), the Fundamental Research Funds for the Central Universities of China (Grant No. 12CX04065A), and the Graduate Innovation Engineering Funded Project of China University of Petroleum (Grant No. 12CX-1247).
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Zhang, D., Wang, K., Tong, J. et al. Characterization of layer-by-layer nano self-assembled carbon nanotube/polymer film sensor for ethanol gas sensing properties. Microsyst Technol 20, 379–385 (2014). https://doi.org/10.1007/s00542-013-1943-4
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DOI: https://doi.org/10.1007/s00542-013-1943-4