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Space-confined growth of monolayer ReSe2 under a graphene layer on Au foils
- Source :
- Nano Research. 12:149-157
- Publication Year :
- 2018
- Publisher :
- Springer Science and Business Media LLC, 2018.
-
Abstract
- Vertical heterostructures based on two-dimensional (2D) materials have attracted widespread interest for their numerous applications in electronic and optoelectronic devices. Herein, we report the direct construction of an abnormal graphene/ReSe2 stack on Au foils by a two-step chemical vapor deposition (CVD) strategy. During the second growth stage, monolayer ReSe2 is found to preferentially evolve at the interface between the first-grown graphene layer and the Au substrate. The unusual stacking behavior is unraveled by in-situ “cutting open” the upper graphene from the defects to expose the lower ReSe2 using scanning tunneling microscopy (STM). From combination of these results with density functional theory calculations, the domain boundaries and edge sites of graphene are proposed to be adsorption sites for Re and Se precursors, further facilitating the growth of ReSe2 at the van der Waals gap of graphene/Au. This work hereby offers an intriguing strategy for obtaining vertical 2D heterostructures featured with an ultra-clean interface and a designed stacking geometry.
- Subjects :
- Materials science
business.industry
Graphene
Stacking
Heterojunction
02 engineering and technology
Chemical vapor deposition
Substrate (electronics)
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Atomic and Molecular Physics, and Optics
0104 chemical sciences
law.invention
law
Monolayer
Optoelectronics
General Materials Science
Electrical and Electronic Engineering
Scanning tunneling microscope
0210 nano-technology
business
Layer (electronics)
Subjects
Details
- ISSN :
- 19980000 and 19980124
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Nano Research
- Accession number :
- edsair.doi...........54ccc28c32ac7ccb0bf6236599108bcd