Observing and tuning the density distribution of localized states of monolayer graphene oxide by using external electric field
Observing and tuning the density distribution of localized states of monolayer graphene oxide by using external electric field
复制标题
利用外电场观察和调节单层氧化石墨烯局域态的密度分布
DOI：
10.1063/1.4916745
复制
发表时间：
2015-03-30
影响因子：
4
通讯作者：
Jia, Suotang
中科院分区：
文献类型：
--
作者：
Gao, Yan;Qin, Chengbing;Jia, Suotang
观察和调谐了外加电场作用下单层氧化石墨烯(MGO)的定域态密度分布。观察到了氧化镁基面上的荧光各向异性，揭示了不均匀的DDLS。电场作用下的增强和/或猝灭的荧光轨迹证实了DDLS的调谐。通过第一性原理密度泛函计算，我们证明了电场调谐的DDLS可以归因于氧化的SP3官能团的极性效应。可调谐的DDLS有利于改善和控制MGO的光电性能。
The density distribution of localized states (DDLS) in monolayer graphene oxide (mGO) was observed and tuned under applied external electric field. The fluorescence anisotropy in mGO basal plane was observed which revealed the inhomogeneous DDLS. The enhanced and/or quenched fluorescence trajectories under electric field demonstrated the tuning of DDLS. Using the first-principles density-functional calculations, we demonstrated that the DDLS tuned by electric field could be attributed to the polarity effect of oxidized sp3 functional groups. The tunable DDLS is beneficial to improve and control the mGO's optoelectronic properties.