Enhancing Multifunctionalities of Transition-Metal Dichalcogenide Monolayers via Cation Intercalation
| Autor: | Yifei Yu, Linyou Cao, Yiling Yu, Kenan Gundogdu, Lujun Huang, Guoqing Li, Yongqing Cai, Andrew Barrette, Yong-Wei Zhang |
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| Rok vydání: | 2017 |
| Předmět: |
Hydrogen ion
Photoluminescence Chemistry Intercalation (chemistry) Inorganic chemistry General Engineering General Physics and Astronomy 02 engineering and technology Orders of magnitude (numbers) 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Transition metal dichalcogenide monolayers 0104 chemical sciences Catalysis Molybdenum sulfide Monolayer General Materials Science 0210 nano-technology |
| Zdroj: | ACS Nano. 11:9390-9396 |
| ISSN: | 1936-086X 1936-0851 |
| DOI: | 10.1021/acsnano.7b04880 |
| Popis: | We have demonstrated that multiple functionalities of transition-metal dichalcogenide (TMDC) monolayers may be substantially improved by the intercalation of small cations (H+ or Li+) between the monolayers and underlying substrates. The functionalities include photoluminescence (PL) efficiency and catalytic activity. The improvement in PL efficiency may be up to orders of magnitude and can be mainly ascribed to two effects of the intercalated cations: p-doping to the monolayers and reducing the influence of substrates, but more studies are necessary to better understand the mechanism for the improvement in the catalytic functionality. The cation intercalation may be achieved by simply immersing substrate-supported monolayers into the solution of certain acids or salts. It is more difficult to intercalate under the monolayers interacting with substrates stronger, such as as-grown monolayers or the monolayers on 2D material substrates. This result presents a versatile strategy to simultaneously optimize mu... |
| Databáze: | OpenAIRE |
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