Site-Selective Oxidation of Monolayered Liquid-Exfoliated WS
| Autor: | Jana Zaumseil, Marcus Dodds, Claudia Backes, Zahra Gholamvand, Eva Steinmann, Georg S. Duesberg, Vaishnavi J. Rao, Beata M. Szydłowska, Sebastian Grieger |
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| Rok vydání: | 2020 |
| Předmět: |
Nanostructure
010405 organic chemistry Regioselectivity General Chemistry 010402 general chemistry 01 natural sciences surfactants Catalysis 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Chemical engineering Pulmonary surfactant Colloidal gold layered compounds nanostructures transition-metal dichalcogenides Chloroauric acid Amphiphile functionalization Surface modification 2D Materials Research Articles Research Article |
| Zdroj: | Angewandte Chemie International Edition Angewandte Chemie (International Ed. in English) |
| ISSN: | 1521-3773 |
| Popis: | In recent years, various functionalization strategies for transition‐metal dichalcogenides have been explored to tailor the properties of materials and to provide anchor points for the fabrication of hybrid structures. Herein, new insights into the role of the surfactant in functionalization reactions are described. Using the spontaneous reaction of WS2 with chloroauric acid as a model reaction, the regioselective formation of gold nanoparticles on WS2 is shown to be heavily dependent on the surfactant employed. A simple model is developed to explain the role of the chosen surfactant in this heterogeneous functionalization reaction. The surfactant coverage is identified as the crucial element that governs the dominant reaction pathway and therefore can severely alter the reaction outcome. This study shows the general importance of the surfactant choice and how detrimental or beneficial a certain surfactant can be to the desired functionalization. The right surfactant: The extent to which the surfactant coverage of two‐dimensional materials can influence functionalization reactions is elaborated. In a case study of the spontaneous reaction of chloroauric acid with WS2, preferential adsorption of certain surfactants can be exploited to exert control on regioselective functionalization. |
| Databáze: | OpenAIRE |
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