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http://dx.doi.org/10.5369/JSST.2018.27.2.132

Room Temperature Hydrogen Gas Sensor Based on Carbon Nanotube Yarn  

Kim, Jae Keon (Aircraft System Technology Group, Korea Institute of Industrial Technology)
Lee, Junyeop (Aircraft System Technology Group, Korea Institute of Industrial Technology)
Kong, Seong Ho (School of Electrical Engineering, Kyungpook National Unversity)
Jung, Daewoong (Aircraft System Technology Group, Korea Institute of Industrial Technology)
Publication Information
Journal of Sensor Science and Technology / v.27, no.2, 2018 , pp. 132-136 More about this Journal
Abstract
We report the development of a room-temperature hydrogen ($H_2$) gas sensor based on carbon nanotubes (CNT) yarn. To detect $H_2$ gas in room temperature, a highly ordered CNT yarn was placed on a substrate from a spin-capable CNT forest, followed by the deposition of a platinum (Pt) layer on surface of the CNT yarn. To examine the effect of the Pt-layer on the response of the CNT sensor, a comparative sensing performance was characterized on both the Pt deposited and non-deposited CNT yarn at room temperature. The Pt-CNT yarn yielded high response, whereas the non-deposited CNT yarn showed negligible response for $H_2$ detection at room temperature. Pt is a reliable and efficient catalyst that can substantially improve the detection of $H_2$ gas by chemical sensitization via a "spillover" effect. It can be efficiently utilized to increase the sensitivity and selectivity as well as to obtain fast response and recovery times.
Keywords
Carbon nanotube yarn; Gas sensor; Hydrogen; Platinum;
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