title: 2D-MoO3 nanosheets for superior gas sensors.
abstract: By taking advantages of both grinding and sonication, an effective exfoliation process is developed to prepare two-dimensional (2D) molybdenum oxide (MoO3) nanosheets. The approach avoids high-boiling-point solvents that would leave a residue and cause aggregation. Gas sensors fabricated using the 2D-MoO3 nanosheets provide a significantly enhanced chemical sensor performance. Compared with the sensors using bulk MoO3, the response of the 2D-MoO3 sensor increases from 7 to 33; the sensor response time is reduced from 27 to 21 seconds, and the recovery time is shortened from 26 to 10 seconds. We attribute the superior performance to the 2D-structure with a much increased surface area and reactive sites.
authors.affiliation: Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710119, China. szliu@dicp.ac.cn.
authors.forename: Fangxu
authors.initials: F
authors.lastname: Ji
authors.forename: Xianpei
authors.initials: X
authors.lastname: Ren
authors.forename: Xiaoyao
authors.initials: X
authors.lastname: Zheng
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Liu
authors.forename: Liuqing
authors.initials: L
authors.lastname: Pang
authors.forename: Jiaxing
authors.initials: J
authors.lastname: Jiang
authors.forename: Shengzhong Frank
authors.initials: SF
authors.lastname: Liu