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Large‐Area Synthesis of Continuous and Uniform MoS 2 Monolayer Films on Graphene
Author(s) -
McCreary Kathleen M.,
Hanbicki Aubrey T.,
Robinson Jeremy T.,
Cobas Enrique,
Culbertson James C.,
Friedman Adam L.,
Jernigan Glenn G.,
Jonker Berend T.
Publication year - 2014
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201401511
Subject(s) - materials science , heterojunction , graphene , monolayer , chemical vapor deposition , nanotechnology , fabrication , raman spectroscopy , optoelectronics , photodetector , photoluminescence , stoichiometry , x ray photoelectron spectroscopy , micrometer , optics , chemical engineering , medicine , chemistry , alternative medicine , physics , organic chemistry , engineering , pathology
Heterostructures composed of multiple layers of different atomically thin materials are of interest due to their unique properties and potential for new device functionality. MoS 2 ‐graphene heterostructures have shown promise as photodetectors and vertical tunnel transistors. However, progress is limited by the typically micrometer‐scale devices and by the multiple alignments required for fabrication when utilizing mechanically exfoliated material. Here, the synthesis of large‐area, continuous, and uniform MoS 2 monolayers directly on graphene by chemical vapor deposition is reported, resulting in heterostructure samples on the centimeter scale with the possibility for even larger lateral dimensions. Atomic force microscopy, photoluminescence, X‐ray photoelectron, and Raman spectroscopies demonstrate uniform single‐layer growth of stoichiometric MoS 2 . The ability to reproducibly generate large‐area heterostructures is highly advantageous for both fundamental investigations and technological applications.