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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article number2009166
Journal / PublicationAdvanced Functional Materials
Volume31
Issue number16
Online published17 Feb 2021
Publication statusPublished - 15 Apr 2021

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.

Research Area(s)

  • anisotropic, photochemistry, redox, reversible doping, 2D materials

Citation Format(s)

Redox Photochemistry on Van Der Waals Surfaces for Reversible Doping in 2D Materials. / Huang, Lingli; Yang, Tiefeng; Wong, Lok Wing; Zheng, Fangyuan; Chen, Xin; Lai, Ka Hei; Liu, Haijun; Thi, Quoc Huy; Shen, Dong; Lee, Chun‐Sing; Deng, Qingming; Zhao, Jiong; Ly, Thuc Hue.

In: Advanced Functional Materials, Vol. 31, No. 16, 2009166, 15.04.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review