Chemical Sensing of 2D Graphene/MoS<sub>2</sub> Heterostructure device

Byungjin Cho(Korea Institute of Materials Science), Jongwon Yoon(Gwangju Institute of Science and Technology), Sung Kwan Lim(Gwangju Institute of Science and Technology), Ah Ra Kim(Korea Institute of Materials Science), Dong-Ho Kim(Korea Institute of Materials Science), Sung‐Gyu Park(Korea Institute of Materials Science), Jung-Dae Kwon(Korea Institute of Materials Science), Young‐Joo Lee(Korea Institute of Materials Science), Kyu Hwan Lee(Korea Institute of Materials Science), Byoung Hun Lee(Gwangju Institute of Science and Technology), Heung Cho Ko(Gwangju Institute of Science and Technology), Myung Gwan Hahm(Korea Institute of Materials Science)
ACS Applied Materials & Interfaces
July 10, 2015
10.1021/acsami.5b04541
Cited by 464

Abstract

We report the production of a two-dimensional (2D) heterostructured gas sensor. The gas-sensing characteristics of exfoliated molybdenum disulfide (MoS2) connected to interdigitated metal electrodes were investigated. The MoS2 flake-based sensor detected a NO2 concentration as low as 1.2 ppm and exhibited excellent gas-sensing stability. Instead of metal electrodes, patterned graphene was used for charge collection in the MoS2-based sensing devices. An equation based on variable resistance terms was used to describe the sensing mechanism of the graphene/MoS2 device. Furthermore, the gas response characteristics of the heterostructured device on a flexible substrate were retained without serious performance degradation, even under mechanical deformation. This novel sensing structure based on a 2D heterostructure promises to provide a simple route to an essential sensing platform for wearable electronics.

Related Papers

No related papers found

Powered by citation graph analysis