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Site‐Selective and van der Waals Epitaxial Growth of Rhenium Disulfide on Graphene
Author(s) -
Seo Jihyung,
Lee Junghyun,
Jeong Gyujeong,
Park Hyesung
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201804133
Subject(s) - graphene , materials science , dangling bond , heterojunction , substrate (aquarium) , van der waals force , chemical vapor deposition , nanotechnology , surface energy , rhenium , epitaxy , chemical physics , optoelectronics , chemistry , composite material , layer (electronics) , silicon , molecule , metallurgy , organic chemistry , oceanography , geology
The surface property of growth substrate imposes significant influence in the growth behaviors of 2D materials. Rhenium disulfide (ReS 2 ) is a new family of 2D transition metal dichalcogenides with unique distorted 1T crystal structure and thickness‐independent direct bandgap. The role of growth substrate is more critical for ReS 2 owing to its weak interlayer coupling property, which leads to preferred growth along the out‐of‐plane direction while suppressing the uniform in‐plane growth. Herein, graphene is introduced as the growth substrate for ReS 2 and the synthesis of graphene/ReS 2 vertical heterostructure is demonstrated via chemical vapor deposition. Compared with the rough surface of SiO 2 /Si substrate with dangling bonds which hinders the uniform growth of ReS 2 , the inert and smooth surface nature of graphene sheet provides a lower energy barrier for migration of the adatoms, thereby promoting the growth of ReS 2 on the graphene surface along the in‐plane direction. Furthermore, patterning of the graphene/ReS 2 heterostructure is achieved by the selective growth of ReS 2 , which is attributed to the strong binding energy between sulfur atoms and graphene surface. The fundamental studies in the role of graphene as the growth template in the formation of van der Waals heterostructures provide better insights into the synthesis of 2D heterostructures.