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Issue:
Theoretical study on gas sensitivity of modified graphene
Author(s):
Tang Ya'nan
,
Shen Zigang
,
Chen Weiguang
,
Li Chenggang
,
Pan Lijun
Pages:
365
-
370
Year:
2015
Issue:
4
Journal:
Journal of Shenzhen University(Science & Engineering)
Keyword:
surface and interface physics
;
density functional theory
;
graphene
;
gas sensitivity
;
electronic structure
;
magnetic property
;
functional device
;
Abstract:
利用基于密度泛函理论的第一性原理计算方法,研究单个CO和O2气体分子在多种金属原子修饰的石墨烯表面的吸附作用.结果表明,空位缺陷结构的石墨烯能够显著提高金属原子的稳定性,失去部分电荷的金属原子有助于调控气体分子的吸附特性.对比发现,单个金属Al和Mo原子掺杂的石墨烯体系对O2分子具有极高的灵敏性和选择性.通过不同气体分子的吸附能够调控石墨烯体系的电子结构和磁性.研究结果测试了不同金属原子修饰石墨烯表面的反应活性,为设计新型金属-石墨烯功能器件提供参考.
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