石墨烯
材料科学
拉曼光谱
带隙
光致发光
等离子体
氧气
石墨烯纳米带
从头算
密度泛函理论
从头算量子化学方法
表面改性
格子(音乐)
凝聚态物理
化学物理
光电子学
纳米技术
计算化学
光学
分子
物理化学
化学
物理
有机化学
量子力学
声学
作者
Amirhasan Nourbakhsh,Mirco Cantoro,Tom Vosch,Geoffrey Pourtois,Francesca Clemente,Marleen H. van der Veen,Johan Hofkens,Marc Heyns,Stefan De Gendt,Bert F. Sels
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2010-10-04
卷期号:21 (43): 435203-435203
被引量:293
标识
DOI:10.1088/0957-4484/21/43/435203
摘要
We report a change in the semimetallic nature of single-layer graphene after exposure to oxygen plasma. The resulting transition from semimetallic to semiconducting behavior appears to depend on the duration of the exposure to the plasma treatment. The observation is confirmed by electrical, photoluminescence and Raman spectroscopy measurements. We explain the opening of a bandgap in graphene in terms of functionalization of its pristine lattice with oxygen atoms. Ab initio calculations show more details about the interaction between carbon and oxygen atoms and the consequences on the optoelectronic properties, that is, on the extent of the bandgap opening upon increased functionalisation density.
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