Metal Decoration Effects on the Gas-Sensing Properties of 2D Hybrid-Structures on Flexible Substrates
| Autor: | Byungjin Cho, Jongwon Yoon, Sung Kwan Lim, Ah Ra Kim, Sun-Young Choi, Dong-Ho Kim, Kyu Hwan Lee, Byoung Hun Lee, Heung Cho Ko, Myung Gwan Hahm |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Sensors, Vol 15, Iss 10, Pp 24903-24913 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1424-8220 23377674 |
| DOI: | 10.3390/s151024903 |
| Popis: | We 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. |
| Databáze: | Directory of Open Access Journals |
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