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ACS Sens. 2017 Sep 22;2(9):1355-1358. doi: 10.1021/acssensors.7b00461. Epub 2017 Aug 25.

Performance Enhancement of a Microfabricated Resonator Using Electrospun Nanoporous Polymer Wire.

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Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 790-784, Republic of Korea.


A nanoporous poly(methyl methacrylate) (PMMA) wire was prepared by electrospinning under high humidity and attached between two prongs of a microfabricated quartz tuning fork (QTF). Exposure of the QTF to ethanol vapor caused a frequency shift due to a decrease in the modulus of the PMMA wire, and the frequency change increased as the concentration of ethanol vapor increased. The nanoporous wire-coated QTF exhibited higher sensitivity and faster response time than a plain wire-coated QTF, which was attributed to the high surface area and pore networks facilitating the transport of ethanol molecules inside the PMMA wire.


electrospinning; gas sensor; microresonators; porous wire; quartz tuning fork


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