One-atom-thick 2D copper oxide clusters on graphene
One-atom-thick 2D copper oxide clusters on graphene
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DOI：
10.1039/c6nr06874j
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发表时间：
2017-03-21
期刊：
影响因子：
6.7
通讯作者：
Takeguchi, Masaki
中科院分区：
文献类型：
--
作者：
Kano, Emi;Kvashnin, Dmitry. G.;Takeguchi, Masaki
石墨烯的成功分离和卓越的性能最近引发了层状化合物中二维（2D）材料的研究；然而，单原子厚的二维材料却鲜有报道。本文用实验和理论方法研究了新型二维氧化铜的结构和性能。电子显微镜观察显示，氧化铜可以在石墨烯上形成具有不寻常的方形晶格的单原子层。密度泛函理论计算表明，正方形晶格中心的氧原子稳定了二维铜结构，并且二维氧化铜片具有不同于三维块氧化铜的不同的电子和磁性能。
The successful isolation and remarkable properties of graphene have recently triggered investigation of two-dimensional (2D) materials from layered compounds; however, one-atom-thick 2D materials without bulk layered counterparts are scarcely reported. Here we report the structure and properties of novel 2D copper oxide studied by experimental and theoretical methods. Electron microscopy observations reveal that copper oxide can form monoatomic layers with an unusual square lattice on graphene. Density functional theory calculations suggest that oxygen atoms at the centre of the square lattice stabilizes the 2D Cu structure, and that the 2D copper oxide sheets have unusual electronic and magnetic properties different from 3D bulk copper oxide.