纳米片
材料科学
纳米晶
惰性气体
惰性
纳米技术
吸附
选择性
掺杂剂
化学工程
光电子学
兴奋剂
催化作用
复合材料
化学
有机化学
工程类
作者
Shumao Cui,Zhenhai Wen,Xingkang Huang,Jingbo Chang,Junhong Chen
出处
期刊:Small
[Wiley]
日期:2015-01-15
卷期号:11 (19): 2305-2313
被引量:333
标识
DOI:10.1002/smll.201402923
摘要
The unique properties of MoS 2 nanosheets make them a promising candidate for high‐performance room temperature sensing. However, the properties of pristine MoS 2 nanosheets are strongly influenced by the significant adsorption of oxygen in an air environment, which leads to instability of the MoS 2 sensing device, and all sensing results on MoS 2 reported to date were exclusively obtained in an inert atmosphere. This significantly limits the practical sensor application of MoS 2 in an air environment. Herein, a novel nanohybrid of SnO 2 nanocrystal (NC)‐decorated crumpled MoS 2 nanosheet (MoS 2 /SnO 2 ) and its exciting air‐stable property for room temperature sensing of NO 2 are reported. Interestingly, the SnO 2 NCs serve as strong p‐type dopants for MoS 2 , leading to p‐type channels in the MoS 2 nanosheets. The SnO 2 NCs also significantly enhance the stability of MoS 2 nanosheets in dry air. As a result, unlike other MoS 2 sensors operated in an inert gas (e.g. N 2 ), the nanohybrids exhibit high sensitivity, excellent selectivity, and repeatability to NO 2 under a practical dry air environment. This work suggests that NC decoration significantly tunes the properties of MoS 2 nanosheets for various applications.
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