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Title: | Redox photochemistry on van der Waals surfaces for reversible doping in 2d materials | Authors: | Huang, L Yang, T Wong, LW Zheng, F Chen, X Lai, KH Liu, H Thi, QH Shen, D Lee, CS Deng, Q Zhao, J Ly, TH |
Issue Date: | 15-Apr-2021 | Source: | Advanced functional materials, 15 Apr. 2021, v. 31, no. 16, 2009166 | 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 |
Publisher: | Wiley-VCH | Journal: | Advanced functional materials | ISSN: | 1616-301X | EISSN: | 1616-3028 | DOI: | 10.1002/adfm.202009166 | Rights: | © 2021 Wiley-VCH GmbH This is the peer reviewed version of the following article: Huang, L., Yang, T., Wong, L. W., Zheng, F., Chen, X., Lai, K. H., ... & Ly, T. H. (2021). Redox photochemistry on van der Waals surfaces for reversible doping in 2D materials. Advanced Functional Materials, 31(16), 2009166, which has been published in final form at https://doi.org/10.1002/adfm.202009166. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
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Wong_Redox_Photochemistry_Van.pdf | Pre-Published version | 3.08 MB | Adobe PDF | View/Open |
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