Publication in refereed journal
香港中文大学研究人员 ( 现职)
| 许建斌教授 (电子工程学系) |
全文
| 数位物件识别号 (DOI) http://dx.doi.org/10.1021/jp211255t |
引用次数
Web of Sciencehttp://aims.cuhk.edu.hk/converis/portal/Publication/17WOS source URL
其它资讯
摘要The electronic properties of graphene supported by the (0001) SiO2 surface are theoretically studied using density functional theory. It is found that the electronic attributes of graphene on (0001) SiO2 strongly depend on the underlying SiO2 surface properties and the percentage of hydrogen passivation. By applying methyl to passivate the oxygen-terminated (0001) SiO2 surface, one can further reduce the interaction between the graphene sheet and oxygen-terminated surface. This can improve the charge carrier mobility of graphene supported by SiO2 substrate and reduce the influence of residues of interfacial molecules. In addition, the external electric field modulates the charge transfer between graphene and the SiO2 surface when graphene layers are physisorbed on the oxide surface. This phenomenon will enhance the built-in electric field of bilayer graphene so as to effectively modify its band structure. Our results shed light on a better atomistic understanding of the recent experiments on graphene supported by SiO2.
着者Chen K, Wang XM, Xu JB, Pan LJ, Wang XR, Shi Y
期刊名称Journal of Physical Chemistry C
出版年份2012
月份3
日期15
卷号116
期次10
出版社AMER CHEMICAL SOC
页次6259 - 6267
国际标準期刊号1932-7447
语言英式英语
Web of Science 学科类别Chemistry; Chemistry, Physical; CHEMISTRY, PHYSICAL; Materials Science; Materials Science, Multidisciplinary; MATERIALS SCIENCE, MULTIDISCIPLINARY; Nanoscience & Nanotechnology; NANOSCIENCE & NANOTECHNOLOGY; Science & Technology - Other Topics
