[15a-PA01-1~56] 17 Nanocarbon Technology (Poster)

▲ [15a-PA01-34] Improvement of the gas sensitivity of a CNT/graphene hybrid structure sensor by the application of strain

〇Xiangyu Qiao¹, Yuto Hirose¹, Meng Yin¹, Ken Suzuki¹, Hideo Miura¹ (1.Tohoku Univ.)

Keywords:graphene, gas sensor, strain

Graphene is considered to be the most promising next-generation gas sensing material. It has an ultra-high sensitivity for detecting various gas molecules. However, graphene cannot distinguish a specific gas molecule from the mixture of the adsorbed multiple gases, and the lack of selectivity limits the application of graphene in the gas sensing field. To improve the performance of the graphene-based gas sensors, the authors proposed two methods: (1) application of mechanical strain for controlling the effective adsorption energy of gas molecules on graphene¹⁾ and (2) surface modification of graphene by carbon nanotube for increasing the gas adsorption area and forming heterojunction to enhance the response of the graphene-based gas sensor.