Direct Pattern Growth of Carbon Nanomaterials by Laser Scribing on Spin-Coated Cu-PI Composite Films and Their Gas Sensor Application |
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| Authors: | Yong-il Ko Geonhee Lee Min Jae Kim Dong Yun Lee Jungtae Nam A-Rang Jang Jeong-O Lee Keun Soo Kim |
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| Affiliation: | 1.Department of Physics and Graphene Research Institute, Sejong University, Seoul 05006, Korea; (Y.-i.K.); (G.L.); (M.J.K.); (D.Y.L.); (J.N.);2.Department of Electrical Engineering, Semyung University, Jecheon 27136, Korea;3.Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), Gajeong-ro 141, Daejeon 34114, Korea; |
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| Abstract: | The excellent physical and chemical properties of carbon nanomaterials render them suitable for application in gas sensors. However, the synthesis of carbon nanomaterials using high-temperature furnaces is time consuming and expensive. In this study, we synthesize a carbon nanomaterial using local laser-scribing on a substrate coated with a Cu-embedded polyimide (PI) thin film to reduce the processing time and cost. Spin coating using a Cu-embedded PI solution is performed to deposit a Cu-embedded PI thin film (Cu@PI) on a quartz substrate, followed by the application of a pulsed laser for carbonization. In contrast to a pristine PI solution-based PI thin film, the laser absorption of the Cu-embedded PI thin film based on Cu@PI improved. The laser-scribed carbon nanomaterial synthesized using Cu@PI exhibits a three-dimensional structure that facilitates gas molecule absorption, and when it is exposed to NO2 and NH3, its electrical resistance changes by −0.79% and +0.33%, respectively. |
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| Keywords: | carbon nanomaterials laser scribing polyimide copper particle gas sensor |
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