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Van Der Waals Force Mediated, Rotationally Aligned Dry-Transfer-Stacking of Two-Dimensional Tungsten Diselenide

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Title
Van Der Waals Force Mediated, Rotationally Aligned Dry-Transfer-Stacking of Two-Dimensional Tungsten Diselenide
Author(s)
Debottam Daw; Riya Sebait; Chandan Biswas
Subject
2D nanomaterial, ; Dry transfer, ; Photoluminescence, ; Raman spectroscopy, ; Rotationally aligned stacking, ; Transition-metal dichalcogenides
Publication Date
2020-11
Journal
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.77, no.10, pp.884 - 887
Publisher
KOREAN PHYSICAL SOC
Abstract
© 2020, The Korean Physical Society. Rotationally aligned, two-dimensional (2D), transition-metal dichalcogenides (TMDs) exhibit unique electronic, optical, and optoelectronic properties compared to random stacking. Rotationally aligned graphene stacking was demonstrated previously for numerous exotic phenomena, such as superconductivity, resonant tunneling, and moiré pattern. However, rotationally aligned drytransfer techniques of TMDs, have yet to be demonstrated. Here, we show a simple method of selective cutting of a few-layer tungsten diselenide (WSe2) flake and rotationally aligning it by using dry-transfer stacking. The dry transfer techniques used for this study were adapted to maintain low sample contamination, a high-quality interface, a low number of defects. A combination of viscoelastic and thermoelastic materials was used for the TMD pickup and release to facilitate the rotationally aligned stacking. Aligned WSe2 stacks were characterized by Raman and photoluminescence spectroscopy to evaluate the integrity of the fabricated stack. This study highlights the possibility of using a rotationally aligned, artificial stacking method for exfoliated TMD materials for future electronic and optoelectronic applications
URI
https://pr.ibs.re.kr/handle/8788114/8445
DOI
10.3938/jkps.77.884
ISSN
0374-4884
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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