P2GS.7 - Hydrogen gas detection of gold nanoparticles on selfactivated graphene layers

17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria
P-2 - Gas Sensors
Y. Kim, S. Park, T. Kim, S. Hong, C. Moon, H. Jang - Department of Materials Science and Engineering, Research Institute for Advanced Materials, Seoul National University, Seoul (Republic of Korea), Y. Choi, B. Hong - Department of Chemistry, Seoul National University, Seoul (Republic of Korea), J. Lee - Department of Materials Science and Engineering, Korea University, Seoul (Republic of Korea), D. Lee - Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk (Republic of Korea)
783 - 784


Graphene is a leading candidate for next-generation gas sensing applications because of various advantages such as high sensitivity at room temperature, transparency, and flexibility. However, poor selectivity, and sluggish sensing behavior at room temperature are major drawbacks for practical use of graphene-based materials. To overcome the disadvantages, many kinds of noble metals are decorated on graphene surfaces. Here, we present room temperature hydrogen detection of Au nanoparticles deposited on self-activated graphene. The Au decorated graphene sensors with selfactivation exhibit enhanced gas sensing properties such as rapid response, full recovery, and high selectivity. We discovered improvement in H2 detection which has never been reported for Au decoration on any materials. The hydrogen sensing mechanism of Au nanoparticles on self-activated graphene is investigated by density-functional theory calculations. This discovery of a new functionality in the existing material broadens the possibility of metal nanoparticle/graphene heterostructures for diverse research areas.