Synthesis and Physical Properties of Phase-Engineered Transition Metal Dichalcogenide Monolayer Heterostructures
Abstract
Heterostructures of transition metal dichalcogenides (TMDs) offer the attractive prospect of combining distinct physical properties derived from different TMD structures. Here, we report direct chemical vapor deposition of in-plane monolayer heterostructures based on 1H-MoS2 and 1T'-MoTe2. The large lattice mismatch between these materials led to intriguing phenomena at their interface. Atomic force microscopy indicated buckling in the 1H region. Tip-enhanced Raman spectroscopy showed mode structure consistent with Te substitution in the 1H region during 1T'-MoTe2 growth. This was confirmed by atomic resolution transmission electron microscopy, which also revealed an atomically stitched, dislocation-free 1H/1T' interface. Theoretical modeling revealed that both the buckling and absence of interfacial misfit dislocations were explained by lateral gradients in Te substitution levels within the 1H region and elastic coupling between 1H and 1T' domains. Phase field simulations predicted 1T' morphologies with spike-shaped islands at specific orientations consistent with experiments. Electrical measurements across the heterostructure confirmed its electrical continuity. This work demonstrates the feasibility of dislocation-free stitching of two different atomic configurations and a pathway toward direct synthesis of monolayer TMD heterostructures of different phases.
- Authors:
-
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1487450
- Grant/Contract Number:
- SC0012575; FG02-07ER15920
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Nano
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 9; Journal ID: ISSN 1936-0851
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; chemical vapor deposition; heterostructure; monolayer; phase engineering; two-dimensional materials
Citation Formats
Naylor, Carl H., Parkin, William M., Gao, Zhaoli, Berry, Joel, Zhou, Songsong, Zhang, Qicheng, McClimon, John Brandon, Tan, Liang Z., Kehayias, Christopher E., Zhao, Meng-Qiang, Gona, Ram S., Carpick, Robert W., Rappe, Andrew M., Srolovitz, David J., Drndic, Marija, and Johnson, Alan T. Charlie. Synthesis and Physical Properties of Phase-Engineered Transition Metal Dichalcogenide Monolayer Heterostructures. United States: N. p., 2017.
Web. doi:10.1021/acsnano.7b03828.
Naylor, Carl H., Parkin, William M., Gao, Zhaoli, Berry, Joel, Zhou, Songsong, Zhang, Qicheng, McClimon, John Brandon, Tan, Liang Z., Kehayias, Christopher E., Zhao, Meng-Qiang, Gona, Ram S., Carpick, Robert W., Rappe, Andrew M., Srolovitz, David J., Drndic, Marija, & Johnson, Alan T. Charlie. Synthesis and Physical Properties of Phase-Engineered Transition Metal Dichalcogenide Monolayer Heterostructures. United States. https://doi.org/10.1021/acsnano.7b03828
Naylor, Carl H., Parkin, William M., Gao, Zhaoli, Berry, Joel, Zhou, Songsong, Zhang, Qicheng, McClimon, John Brandon, Tan, Liang Z., Kehayias, Christopher E., Zhao, Meng-Qiang, Gona, Ram S., Carpick, Robert W., Rappe, Andrew M., Srolovitz, David J., Drndic, Marija, and Johnson, Alan T. Charlie. Wed .
"Synthesis and Physical Properties of Phase-Engineered Transition Metal Dichalcogenide Monolayer Heterostructures". United States. https://doi.org/10.1021/acsnano.7b03828. https://www.osti.gov/servlets/purl/1487450.
@article{osti_1487450,
title = {Synthesis and Physical Properties of Phase-Engineered Transition Metal Dichalcogenide Monolayer Heterostructures},
author = {Naylor, Carl H. and Parkin, William M. and Gao, Zhaoli and Berry, Joel and Zhou, Songsong and Zhang, Qicheng and McClimon, John Brandon and Tan, Liang Z. and Kehayias, Christopher E. and Zhao, Meng-Qiang and Gona, Ram S. and Carpick, Robert W. and Rappe, Andrew M. and Srolovitz, David J. and Drndic, Marija and Johnson, Alan T. Charlie},
abstractNote = {Heterostructures of transition metal dichalcogenides (TMDs) offer the attractive prospect of combining distinct physical properties derived from different TMD structures. Here, we report direct chemical vapor deposition of in-plane monolayer heterostructures based on 1H-MoS2 and 1T'-MoTe2. The large lattice mismatch between these materials led to intriguing phenomena at their interface. Atomic force microscopy indicated buckling in the 1H region. Tip-enhanced Raman spectroscopy showed mode structure consistent with Te substitution in the 1H region during 1T'-MoTe2 growth. This was confirmed by atomic resolution transmission electron microscopy, which also revealed an atomically stitched, dislocation-free 1H/1T' interface. Theoretical modeling revealed that both the buckling and absence of interfacial misfit dislocations were explained by lateral gradients in Te substitution levels within the 1H region and elastic coupling between 1H and 1T' domains. Phase field simulations predicted 1T' morphologies with spike-shaped islands at specific orientations consistent with experiments. Electrical measurements across the heterostructure confirmed its electrical continuity. This work demonstrates the feasibility of dislocation-free stitching of two different atomic configurations and a pathway toward direct synthesis of monolayer TMD heterostructures of different phases.},
doi = {10.1021/acsnano.7b03828},
journal = {ACS Nano},
number = 9,
volume = 11,
place = {United States},
year = {Wed Aug 02 00:00:00 EDT 2017},
month = {Wed Aug 02 00:00:00 EDT 2017}
}
Web of Science
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