Redox Photochemistry on Van Der Waals Surfaces for Reversible Doping in 2D Materials

Lingli Huang; Tiefeng Yang; Lok Wing Wong; Fangyuan Zheng; Xin Chen; Ka Hei Lai; Haijun Liu; Quoc Huy Thi; Dong Shen; Chun Sing Lee; Qingming Deng; Jiong Zhao; Thuc Hue Ly

doi:10.1002/adfm.202009166

Redox Photochemistry on Van Der Waals Surfaces for Reversible Doping in 2D Materials

Lingli Huang, Tiefeng Yang, Lok Wing Wong, Fangyuan Zheng, Xin Chen, Ka Hei Lai, Haijun Liu, Quoc Huy Thi, Dong Shen, Chun Sing Lee, Qingming Deng, Jiong Zhao, Thuc Hue Ly

Research output: Journal article publication › Journal article › Academic research › peer-review

7 Citations (Scopus)

Abstract

Despite the van der Waals (vdW) surfaces are usually chemically inert, un-destructive, scalable, and reversible redox reactions are introduced on the vdW surfaces of 2D anisotropic semiconductors ReX₂ (X = S or Se) facilitated by simple photochemistry. Ultraviolet (UV) light (with humid) and laser exposure can reversibly oxidize and reduce rhenium disulfide (ReS₂) and rhenium diselenide (ReSe₂), respectively, yielding a pronounced doping effect with good control. Evidenced by Raman spectroscopy, dynamic force microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy, the grafting and removal of covalently functionalized oxygen groups on the perfect vdW surfaces are confirmed. The optical and electrical properties can be thereby reversibly tunable in wide ranges. Such optical direct-writing and rewritable capability via solvent/contaminant-free approach for chemical doping are compelling in the coming era of 2D materials.

Original language	English
Article number	2009166
Journal	Advanced Functional Materials
Volume	31
Issue number	16
DOIs	https://doi.org/10.1002/adfm.202009166
Publication status	Published - 15 Apr 2021

Keywords

2D materials
anisotropic
photochemistry
redox
reversible doping

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

More information

10.1002/adfm.202009166

http://hdl.handle.net/10397/95699

Cite this

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title = "Redox Photochemistry on Van Der Waals Surfaces for Reversible Doping in 2D Materials",

abstract = "Despite the van der Waals (vdW) surfaces are usually chemically inert, un-destructive, scalable, and reversible redox reactions are introduced on the vdW surfaces of 2D anisotropic semiconductors ReX2 (X = S or Se) facilitated by simple photochemistry. Ultraviolet (UV) light (with humid) and laser exposure can reversibly oxidize and reduce rhenium disulfide (ReS2) and rhenium diselenide (ReSe2), respectively, yielding a pronounced doping effect with good control. Evidenced by Raman spectroscopy, dynamic force microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy, the grafting and removal of covalently functionalized oxygen groups on the perfect vdW surfaces are confirmed. The optical and electrical properties can be thereby reversibly tunable in wide ranges. Such optical direct-writing and rewritable capability via solvent/contaminant-free approach for chemical doping are compelling in the coming era of 2D materials.",

keywords = "2D materials, anisotropic, photochemistry, redox, reversible doping",

author = "Lingli Huang and Tiefeng Yang and Wong, {Lok Wing} and Fangyuan Zheng and Xin Chen and Lai, {Ka Hei} and Haijun Liu and Thi, {Quoc Huy} and Dong Shen and Lee, {Chun Sing} and Qingming Deng and Jiong Zhao and Ly, {Thuc Hue}",

note = "Funding Information: This work was supported by National Science Foundation of China (Project No. 51872248, 21703076, 51922113), the Hong Kong Research Grant Council under Early Career Scheme (Project No. 25301018), and the Hong Kong Research Grant Council General Research Fund (Project No. 11300820, 15302419), City University of Hong Kong (Project No. 9680241, 7005259), Natural Science Foundation of Jiangsu Province of China (Project No. BK20170466), Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No.18KJA140001). Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

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doi = "10.1002/adfm.202009166",

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T1 - Redox Photochemistry on Van Der Waals Surfaces for Reversible Doping in 2D Materials

AU - Huang, Lingli

AU - Yang, Tiefeng

AU - Wong, Lok Wing

AU - Zheng, Fangyuan

AU - Chen, Xin

AU - Lai, Ka Hei

AU - Liu, Haijun

AU - Thi, Quoc Huy

AU - Shen, Dong

AU - Lee, Chun Sing

AU - Deng, Qingming

AU - Zhao, Jiong

AU - Ly, Thuc Hue

N1 - Funding Information: This work was supported by National Science Foundation of China (Project No. 51872248, 21703076, 51922113), the Hong Kong Research Grant Council under Early Career Scheme (Project No. 25301018), and the Hong Kong Research Grant Council General Research Fund (Project No. 11300820, 15302419), City University of Hong Kong (Project No. 9680241, 7005259), Natural Science Foundation of Jiangsu Province of China (Project No. BK20170466), Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No.18KJA140001). Publisher Copyright: © 2021 Wiley-VCH GmbH

PY - 2021/4/15

Y1 - 2021/4/15

N2 - Despite the van der Waals (vdW) surfaces are usually chemically inert, un-destructive, scalable, and reversible redox reactions are introduced on the vdW surfaces of 2D anisotropic semiconductors ReX2 (X = S or Se) facilitated by simple photochemistry. Ultraviolet (UV) light (with humid) and laser exposure can reversibly oxidize and reduce rhenium disulfide (ReS2) and rhenium diselenide (ReSe2), respectively, yielding a pronounced doping effect with good control. Evidenced by Raman spectroscopy, dynamic force microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy, the grafting and removal of covalently functionalized oxygen groups on the perfect vdW surfaces are confirmed. The optical and electrical properties can be thereby reversibly tunable in wide ranges. Such optical direct-writing and rewritable capability via solvent/contaminant-free approach for chemical doping are compelling in the coming era of 2D materials.

AB - Despite the van der Waals (vdW) surfaces are usually chemically inert, un-destructive, scalable, and reversible redox reactions are introduced on the vdW surfaces of 2D anisotropic semiconductors ReX2 (X = S or Se) facilitated by simple photochemistry. Ultraviolet (UV) light (with humid) and laser exposure can reversibly oxidize and reduce rhenium disulfide (ReS2) and rhenium diselenide (ReSe2), respectively, yielding a pronounced doping effect with good control. Evidenced by Raman spectroscopy, dynamic force microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy, the grafting and removal of covalently functionalized oxygen groups on the perfect vdW surfaces are confirmed. The optical and electrical properties can be thereby reversibly tunable in wide ranges. Such optical direct-writing and rewritable capability via solvent/contaminant-free approach for chemical doping are compelling in the coming era of 2D materials.

KW - 2D materials

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KW - photochemistry

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KW - reversible doping

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Redox Photochemistry on Van Der Waals Surfaces for Reversible Doping in 2D Materials

Abstract

Keywords

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