van der Waals Epitaxy of MoS2 Layers Using Graphene As Growth Templates

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Nano Letters

DOI:https://doi.org/10.1021/nl204562j· OSTI ID:1049932

Shi, Yumeng ^[1]; Zhou, Wu ^[2]; Lu, Ang-Yu ^[3]; Fang, Wenjing ^[1]; Lee, Yi-Hsien ^[1]; Hsu, Allen Long ^[1]; Kim, Soo Min ^[1]; Kim, Ki Kang ^[1]; Yang, Hui Ying ^[4]; Liang, Lain-Jong ^[3]; Idrobo Tapia, Juan C ^[5]; Kong, Jing ^[1]

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1. Massachusetts Institute of Technology (MIT)
2. Vanderbilt University
3. Academia Sinica, Hefei, China
4. Singapore University of Technology and Design
5. ORNL

We present a method for synthesizing MoS{sub 2}/Graphene hybrid heterostructures with a growth template of graphene-covered Cu foil. Compared to other recent reports, a much lower growth temperature of 400 C is required for this procedure. The chemical vapor deposition of MoS{sub 2} 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 MoS{sub 2} flakes epitaxially on the graphene surface via thermal decomposition. With higher amount of precursor delivered onto the graphene surface, a continuous MoS{sub 2} 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 MoS{sub 2}/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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1049932
• Journal Information: Nano Letters, Vol. 12, Issue 6; ISSN 1530-6984
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CATALYSTS
CHEMICAL VAPOR DEPOSITION
EPITAXY
MOLYBDENUM
PRECURSOR
PYROLYSIS
SOLVENTS
SYNTHESIS
STEM
EELS
graphene
MoS2