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Vertical Few-Layer WSe2 Nanosheets for NO2 Sensing
Duan, Yu1,2; Feng, Shuanglong2; Zhang, Kun2; Qiu, Jiajia3,4; Zhang, Sam1
2021-11-26
摘要WSe2 has been widely used in NO2 gas sensors in recent years, but it still suffers from low responsiveness and slow reaction kinetics. Herein, we used the chemical vapor deposition method to synthesize a vertically grown few-layer WSe2 (3D-WSe2) nanosheet film. Three-dimensional-WSe2 is transformed into vertical growth by introducing a TiO2 buffer layer and exposes much more edge active sites to improve gas sensitivity. As a result, it has not only high crystallinity and few defects but also a high response to NO2 (34.6% at 1 ppm), a fast response time (66 s), a short recovery time (17 min), a low limit of detection (4 ppb), excellent stability, and gas selectivity at room temperature.
关键词3D-WSe2 TiO2 buffer layer vertical growth abundant edges gas sensor
DOI10.1021/acsanm.1c02603
发表期刊ACS APPLIED NANO MATERIALS
卷号4期号:11页码:12043-12050
通讯作者Feng, Shuanglong(fengshuanglong@cigit.ac.cn) ; Zhang, Sam(samzhang@swu.edu.cn)
收录类别SCI
WOS记录号WOS:000752894100066
语种英语