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Enhanced gas-sensing performance of graphene by doping transition metal atoms: A first-principles study
Authors:Dongxiang Zhao  Xiaoli Fan  Zhifen Luo  Yurong An  Yan Hu
Institution:State Key Laboratory of Solidification Processing, Centre of Advanced Lubrication and Seal Materials, School of Material Science and Engineering, Northwestern Polytechnical University, 127 YouYi Western Road, Xi''an, Shaanxi 710072, China
Abstract:By performing the first-principles calculations, we investigated the sensitivity and selectivity of transitional metal (TM, TM/>Sc, Ti, V, Cr and Mn) atoms doped graphene toward NO molecule. We firstly calculated the atomic structures, electronic structures and magnetic properties of TM-doped graphene, then studied the adsorptions of NO, N<sub>2</sub> and O<sub>2</sub> molecules on the TM-doped graphene. By comparing the change of electrical conductivity and magnetic moments after the adsorption of these molecules, we found that the Sc-, Ti- and Mn-doped graphene are the potential candidates in the applications of gas sensor for detection NO molecule.</td>
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Keywords:Gas sensor  NO molecule  Graphene  Transitional metal atom doping  First-principles method
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