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Title: Rotationally Commensurate Growth of MoS2 on Epitaxial Graphene

Journal Article · · ACS Nano

Atomically thin MoS2/graphene heterostructures are promising candidates for nanoelectronic and optoelectronic technologies. Among different graphene substrates, epitaxial graphene (EG) on SiC provides several potential advantages for such heterostructures, including high electronic quality, tunable substrate coupling, wafer-scale processability, and crystalline ordering that can template commensurate growth. Exploiting these attributes, we demonstrate here the thickness-controlled van der Waals epitaxial growth of MoS2 on EG via chemical vapor deposition, giving rise to transfer-free synthesis of a two-dimensional heterostructure with registry between its constituent materials. The rotational commensurability observed between the MoS2 and EG is driven by the energetically favorable alignment of their respective lattices and results in nearly strain-free MoS2, as evidenced by synchrotron X-ray scattering and atomic-resolution scanning tunneling microscopy (STM). Finally, the electronic nature of the MoS2/EG heterostructure is elucidated with STM and scanning tunneling spectroscopy, which reveals bias-dependent apparent thickness, band bending, and a reduced band gap of ~0.4 eV at the monolayer MoS2 edges.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Institute of Standards and Technology (NIST); US Department of the Navy, Office of Naval Research (ONR)
Grant/Contract Number:
70NANB14H012; FG02-09ER16109; AC02-06CH11357; SC0001059; N00014-14-1-0669; DMR01121262
OSTI ID:
1240188
Journal Information:
ACS Nano, Vol. 10, Issue 1; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 162 works
Citation information provided by
Web of Science

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Heterogeneous Integration of 2D Materials: Recent Advances in Fabrication and Functional Device Applications journal December 2019
Epitaxial growth of hybrid nanostructures journal January 2018
Interface Characterization and Control of 2D Materials and Heterostructures journal July 2018
Evaluating arbitrary strain configurations and doping in graphene with Raman spectroscopy journal November 2017
2D materials for quantum information science journal August 2019
2D materials and van der Waals heterostructures journal July 2016
Band-bending induced by charged defects and edges of atomically thin transition metal dichalcogenide films journal June 2018
Magneto-spectroscopy of exciton Rydberg states in a CVD grown WSe 2 monolayer journal June 2019
Tunable and laser-reconfigurable 2D heterocrystals obtained by epitaxial stacking of crystallographically incommensurate Bi 2 Se 3 and MoS 2 atomic layers journal July 2017
Temperature dependence of phonon properties in CVD MoS 2 nanostructures – a statistical approach journal January 2018
Substantial improvements of long-term stability in encapsulation-free WS 2 using highly interacting graphene substrate journal November 2016
Chemical and structural stability of 2D layered materials journal July 2019
Decoupling the Interaction between Wet-Transferred MoS 2 and Graphite Substrate by an Interfacial Water Layer journal August 2018
Temperature-Related Morphological Evolution of MoS 2 Domains on Graphene and Electron Transfer within Heterostructures journal February 2017
Growth and Thermo-driven Crystalline Phase Transition of Metastable Monolayer 1T′-WSe2 Thin Film journal February 2019
Tuning the morphology and chemical composition of MoS2 nanostructures journal February 2019
Electronic transport in disordered MoS 2 nanoribbons journal January 2017
Electrolytic phototransistor based on graphene-MoS 2 van der Waals p-n heterojunction with tunable photoresponse journal September 2016
Dose-dependent effect of proton irradiation on electrical properties of WSe 2 ambipolar field effect transistors journal January 2019
Bandgap broadening at grain boundaries in single-layer MoS2 journal July 2018
2D materials advances: from large scale synthesis and controlled heterostructures to improved characterization techniques, defects and applications journal December 2016
Growth of ‘W’ doped molybdenum disulfide on graphene transferred molybdenum substrate journal May 2018
Small stoichiometric (MoS 2 ) n clusters with the 1T phase journal January 2018
Molecular beam epitaxy of quasi-freestanding transition metal disulphide monolayers on van der Waals substrates: a growth study journal January 2018
Multimodal spectromicroscopy of monolayer WS 2 enabled by ultra-clean van der Waals epitaxy journal July 2018
Evolution of Metastable Defects and Its Effect on the Electronic Properties of MoS2 Films journal April 2018
MoS 2 -based nanostructures: synthesis and applications in medicine journal February 2019
Recent progress in the controlled synthesis of 2D metallic transition metal dichalcogenides journal February 2019
Scanning Probe Nanopatterning and Layer-by-Layer Thinning of Black Phosphorus journal November 2016
Self-organized twist-heterostructures via aligned van der Waals epitaxy and solid-state transformations journal December 2019
Temperature-Mediated Selective Growth of MoS 2 /WS 2 and WS 2 /MoS 2 Vertical Stacks on Au Foils for Direct Photocatalytic Applications journal October 2016
Evaluating arbitrary strain configurations and doping in graphene with Raman spectroscopy text January 2018
2D materials and van der Waals heterostructures text January 2016
Magneto-spectroscopy of exciton Rydberg states in a CVD grown WSe2 monolayer text January 2019
Large area molybdenum disulphide- epitaxial graphene vertical Van der Waals heterostructures journal June 2016
Self-assembly of electronically abrupt borophene/organic lateral heterostructures journal February 2017


Figures / Tables (7)