Metal Decoration Effects on the Gas-Sensing Properties of 2D Hybrid-Structures on Flexible Substrates
AbstractWe have investigated the effects of metal decoration on the gas-sensing properties of a device with two-dimensional (2D) molybdenum disulfide (MoS2) flake channels and graphene electrodes. The 2D hybrid-structure device sensitively detected NO2 gas molecules (>1.2 ppm) as well as NH3 (>10 ppm). Metal nanoparticles (NPs) could tune the electronic properties of the 2D graphene/MoS2 device, increasing sensitivity to a specific gas molecule. For instance, palladium NPs accumulate hole carriers of graphene/MoS2, electronically sensitizing NH3 gas molecules. Contrarily, aluminum NPs deplete hole carriers, enhancing NO2 sensitivity. The synergistic combination of metal NPs and 2D hybrid layers could be also applied to a flexible gas sensor. There was no serious degradation in the sensing performance of metal-decorated MoS2 flexible devices before/after 5000 bending cycles. Thus, highly sensitive and endurable gas sensor could be achieved through the metal-decorated 2D hybrid-structure, offering a useful route to wearable electronic sensing platforms. View Full-Text
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Cho, B.; Yoon, J.; Lim, S.K.; Kim, A.R.; Choi, S.-Y.; Kim, D.-H.; Lee, K.H.; Lee, B.H.; Ko, H.C.; Hahm, M.G. Metal Decoration Effects on the Gas-Sensing Properties of 2D Hybrid-Structures on Flexible Substrates. Sensors 2015, 15, 24903-24913.
Cho B, Yoon J, Lim SK, Kim AR, Choi S-Y, Kim D-H, Lee KH, Lee BH, Ko HC, Hahm MG. Metal Decoration Effects on the Gas-Sensing Properties of 2D Hybrid-Structures on Flexible Substrates. Sensors. 2015; 15(10):24903-24913.Chicago/Turabian Style
Cho, Byungjin; Yoon, Jongwon; Lim, Sung K.; Kim, Ah R.; Choi, Sun-Young; Kim, Dong-Ho; Lee, Kyu H.; Lee, Byoung H.; Ko, Heung C.; Hahm, Myung G. 2015. "Metal Decoration Effects on the Gas-Sensing Properties of 2D Hybrid-Structures on Flexible Substrates." Sensors 15, no. 10: 24903-24913.