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Homoepitaxial Growth of Large-Scale Highly Organized Transition Metal Dichalcogenide Patterns

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Title: Homoepitaxial Growth of Large-Scale Highly Organized Transition Metal Dichalcogenide Patterns
Authors: Chen, J
Zhao, X
Grinblat, G
Chen, Z
Tan, SJR
Fu, W
Ding, Z
Abdelwahab, I
Li, Y
Geng, D
Liu, Y
Leng, K
Liu, B
Liu, W
Tang, W
Maier, SA
Pennycook, SJ
Loh, KP
Item Type: Journal Article
Abstract: Controllable growth of highly crystalline transition metal dichalcogenide (TMD) patterns with regular morphology and unique edge structure is highly desired and important for fundamental research and potential applications. Here, single-crystalline MoS2 flakes are reported with regular trigonal symmetric patterns that can be homoepitaxially grown on MoS2 monolayer via chemical vapor deposition. The highly organized MoS2 patterns are rhombohedral (3R)-stacked with the underlying MoS2 monolayer, and their boundaries are predominantly terminated by zigzag Mo edge structure. The epitaxial MoS2 crystals can be tailored from compact triangles to fractal flakes, and the pattern formation can be explained by the anisotropic growth rates of the S and Mo edges under low sulfur chemical potential. The 3R-stacked MoS2 pattern demonstrates strong second and third-harmonic-generation signals, which exceed those reported for monolayer MoS2 by a factor of 6 and 4, correspondingly. This homoepitaxial growth approach for making highly organized TMD patterns is also demonstrated for WS2.
Issue Date: 8-Dec-2017
Date of Acceptance: 14-Sep-2017
URI: http://hdl.handle.net/10044/1/56838
DOI: https://dx.doi.org/10.1002/adma.201704674
ISSN: 0935-9648
Publisher: Wiley
Journal / Book Title: Advanced Materials
Volume: 30
Issue: 4
Copyright Statement: This is the peer reviewed version of the following article: J. Chen, X. Zhao, G. Grinblat, Z. Chen, S. J. R. Tan, W. Fu, Z. Ding, I. Abdelwahab, Y. Li, D. Geng, Y. Liu, K. Leng, B. Liu, W. Liu, W. Tang, S. A. Maier, S. J. Pennycook, K. P. Loh, Adv. Mater. 2018, 30, 1704674., which has been published in final form at https://dx.doi.org/10.1002/adma.201704674.  This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
2D materials
chemical vapor deposition
harmonic generation
highly organized patterns
homoepitaxial growth
transition metal dichalcogenides
CHEMICAL-VAPOR-DEPOSITION
DIFFUSION-LIMITED AGGREGATION
MOS2 ATOMIC LAYERS
MOLYBDENUM-DISULFIDE
MONOLAYER MOS2
VALLEY POLARIZATION
EPITAXIAL-GROWTH
PHASE GROWTH
MOLTEN GLASS
CRYSTALS
02 Physical Sciences
03 Chemical Sciences
09 Engineering
Publication Status: Published
Article Number: 1704674
Appears in Collections:Physics
Experimental Solid State
Faculty of Natural Sciences



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