期刊
NANO LETTERS
卷 12, 期 6, 页码 2784-2791出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl204562J
关键词
Chemical vapor deposition; van der Waals epitaxy; molybdenum disulfide; graphene; STEM imaging
类别
资金
- National Science Foundation [DMR 0845358]
- Interconnect Focus Center (IFC)
- Materials, Structure, and Devices (MSD)
- Semiconductor Research Corporation
- National Research Foundation of Korea [DMR-0938330]
- Korean Government [NRF-2011-357- C00028]
- Oak Ridge National Laboratory's Shared Research Equipment (ShaRE) User Facility
- Office of Basic Energy Sciences, U.S. Department of Energy
- Academia Sinica
- National Science Council in Taiwan [NSC-99-2112-M-001-021-MY3]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0938330, 0845358] Funding Source: National Science Foundation
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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