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; Quoc Huy Thi; Shen Dong; Lee Chun-Sing; Deng Qingming; Zhao Jiong; Thuc Hue Ly

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

机译：浏览码头涂布器的氧化还原光化学在2D材料中可逆掺杂的曲面

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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.

机译：尽管Van der Wa种（VDW）表面通常是化学惰性的，但在通过简单的光化学促进的2D各向异性半导体REX2（X = S或SE）的VDW表面上引入了未破坏性，可扩展性和可逆的氧化还原反应。紫外线（UV）光（含湿度）和激光曝光可分别可逆氧化和减少铼二硫化物（Res2）和铼酶（Rese2），从而产生良好的控制。通过拉曼光谱，动态力显微镜，透射电子显微镜和X射线光电子能谱证明，确认了完美VDW表面上共价官能化氧基团的接枝和去除。由此可以在宽范围内可逆地调谐光学和电性能。通过溶剂/可污染方法用于化学掺杂的这种光学直接写入和可重写能力在未来的2D材料时代令人引人注目。

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来源
《Advanced Functional Materials》 |2021年第16期|2009166.1-2009166.9|共9页
作者
Huang Lingli; Yang Tiefeng; Wong Lok Wing; Zheng Fangyuan; Chen Xin; Lai Ka Hei; Liu Haijun; Quoc Huy Thi; Shen Dong; Lee Chun-Sing; Deng Qingming; Zhao Jiong; Thuc Hue Ly;
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作者单位

City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China|City Univ Hong Kong Ctr Super Diamond & Adv Films Hong Kong 999077 Peoples R China|City Univ Hong Kong Shenzhen Res Inst Shenzhen 518000 Peoples R China;

City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China|City Univ Hong Kong Ctr Super Diamond & Adv Films Hong Kong 999077 Peoples R China;

Hong Kong Polytech Univ Dept Appl Phys Hong Kong 999077 Peoples R China|Hong Kong Polytech Univ Shenzhen Res Inst Shenzhen 518000 Peoples R China;

Hong Kong Polytech Univ Dept Appl Phys Hong Kong 999077 Peoples R China|Hong Kong Polytech Univ Shenzhen Res Inst Shenzhen 518000 Peoples R China;

City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China|City Univ Hong Kong Ctr Super Diamond & Adv Films Hong Kong 999077 Peoples R China|City Univ Hong Kong Shenzhen Res Inst Shenzhen 518000 Peoples R China;

Hong Kong Polytech Univ Dept Appl Phys Hong Kong 999077 Peoples R China|Hong Kong Polytech Univ Shenzhen Res Inst Shenzhen 518000 Peoples R China;

City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China|City Univ Hong Kong Ctr Super Diamond & Adv Films Hong Kong 999077 Peoples R China|City Univ Hong Kong Shenzhen Res Inst Shenzhen 518000 Peoples R China;

City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China|City Univ Hong Kong Ctr Super Diamond & Adv Films Hong Kong 999077 Peoples R China|City Univ Hong Kong Shenzhen Res Inst Shenzhen 518000 Peoples R China;

City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China|City Univ Hong Kong Ctr Super Diamond & Adv Films Hong Kong 999077 Peoples R China;

City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China|City Univ Hong Kong Ctr Super Diamond & Adv Films Hong Kong 999077 Peoples R China;

Huaiyin Normal Univ Phys Dept Huaian 223300 Peoples R China|Huaiyin Normal Univ Jiangsu Key Lab Chem Low Dimens Mat Huaian 223300 Peoples R China;

Hong Kong Polytech Univ Dept Appl Phys Hong Kong 999077 Peoples R China|Hong Kong Polytech Univ Shenzhen Res Inst Shenzhen 518000 Peoples R China;

City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China|City Univ Hong Kong Ctr Super Diamond & Adv Films Hong Kong 999077 Peoples R China|City Univ Hong Kong Shenzhen Res Inst Shenzhen 518000 Peoples R China;

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正文语种 eng
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关键词
anisotropic; photochemistry; redox; reversible doping; 2D materials;

机译：各向异性;光化学;氧化还原;可逆掺杂;2D材料;

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

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