Gas adsorption on MoS2 monolayer from first-principles calculations

被引:375
作者
Zhao, Shijun [1 ,2 ]
Xue, Jianming [1 ,2 ]
Kang, Wei [2 ]
机构
[1] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[2] Peking Univ, Ctr Appl Phys & Technol, HEDPS, Beijing 100871, Peoples R China
关键词
GENERALIZED GRADIENT APPROXIMATION; TOTAL-ENERGY CALCULATIONS; DENSITY;
D O I
10.1016/j.cplett.2014.01.043
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
First-principles calculations within density functional theory have been carried out to investigate the adsorption of various gas molecules including CO, CO2, NH3, NO, NO2, CH4, H2O, N-2, O-2 and SO2 on MoS2 monolayer in order to fully exploit gas sensing capabilities of MoS2. By including van der Waals interactions between gas molecules and MoS2, we find that only NO and NO2 can bind strongly to MoS2 sheet compared to other gas molecules, in line with experimental observations. The charge transfer and variation of electronic structures are discussed in view of the density of states and molecular orbitals of gas molecules. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:35 / 42
页数:8
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