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

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 30(2018), 4 vom: 08. Jan.
1. Verfasser:	Chen, Jianyi (VerfasserIn)
Weitere Verfasser:	Zhao, Xiaoxu, Grinblat, Gustavo, Chen, Zhongxin, Tan, Sherman J R, Fu, Wei, Ding, Zijing, Abdelwahab, Ibrahim, Li, Yi, Geng, Dechao, Liu, Yanpeng, Leng, Kai, Liu, Bo, Liu, Wei, Tang, Wei, Maier, Stefan A, Pennycook, Stephen John, Loh, Kian Ping
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2018
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article 2D materials chemical vapor deposition harmonic generation highly organized patterns homoepitaxial growth transition metal dichalcogenides

Beschreibung
Zusammenfassung:	© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. 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
Beschreibung:	Date Completed 01.08.2018 Date Revised 01.10.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.201704674