Homoepitaxial Growth of Large-Scale Highly Organized Transition Metal Dichalcogenide Patterns
File(s)
Accepted version
Author(s)
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.
Date Issued
2017-12-08
Date Acceptance
2017-09-14
Citation
Advanced Materials, 2017, 30 (4)
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.
Subjects
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
Publication Status
Published
Article Number
1704674