van der Waals Epitaxy of MoS2 Layers Using Graphene As Growth Templates
- Authors
- Shi, Yumeng; Zhou, Wu; Lu, Ang-Yu; Fang, Wenjing; Lee, Yi-Hsien; Hsu, Allen Long; Kim, Soo Min; Kim, Ki Kang; Yang, Hui Ying; Li, Lain-Jong; Idrobo, Juan-Carlos; Kong, Jing
- Issue Date
- Jun-2012
- Publisher
- AMER CHEMICAL SOC
- Citation
- NANO LETTERS, v.12, no.6, pp 2784 - 2791
- Pages
- 8
- Journal Title
- NANO LETTERS
- Volume
- 12
- Number
- 6
- Start Page
- 2784
- End Page
- 2791
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/159294
- DOI
- 10.1021/nl204562j
- ISSN
- 1530-6984
1530-6992
- Abstract
- We present a method for synthesizing MoS2/Graphene hybrid heterostructures with a growth template of graphene-covered Cu foil. Compared to other recent reports,(1,2) a much lower growth temperature of 400 degrees C is required for this procedure. The chemical vapor deposition of MoS2 on the graphene surface gives rise to single crystalline hexagonal flakes with a typical lateral size ranging from several hundred nanometers to several micrometers. The precursor (ammonium thiomolybdate) together with solvent was transported to graphene surface by a carrier gas at room temperature, which was then followed by post annealing. At an elevated temperature, the precursor self-assembles to form MoS2 flakes epitaxially on the graphene surface via thermal decomposition. With higher amount of precursor delivered onto the graphene surface, a continuous MoS2 film on graphene can be obtained. This simple chemical vapor deposition method provides a unique approach for the synthesis of graphene heterostructures and surface functionalization of graphene. The synthesized two-dimensional MoS2/Graphene hybrids possess great potential toward the development of new optical and electronic devices as well as a wide variety of newly synthesizable compounds for catalysts.
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