期刊
ADVANCED MATERIALS
卷 30, 期 49, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201804650
关键词
density functional theory; graphene; scanning tunneling microscopy; silicene; van der Waals heterostructures
类别
资金
- National 973 projects of China [2013CBA01600]
- National Key Research & Development Projects of China [2016YFA0202300, 2018FYA0305800]
- National Natural Science Foundation of China [61390501, 61474141, 11604373]
- CAS Pioneer Hundred Talents Program
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB28000000]
- Beijing Nova Program [Z181100006218023]
- U.S. Department of Energy [DE-FG02-09ER46554]
- McMinn Endowment
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
Silicene-based van der Waals heterostructures are theoretically predicted to have interesting physical properties, but their experimental fabrication has remained a challenge because of the easy oxidation of silicene in air. Here, the fabrication of graphene/silicene van der Waals heterostructures by silicon intercalation is reported. Density functional theory calculations show weak interactions between graphene and silicene layers, confirming the formation of van der Waals heterostructures. The heterostructures show no observable damage after air exposure for extended periods, indicating good air stability. The I-V characteristics of the vertical graphene/silicene/Ru heterostructures show rectification behavior.
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