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| Hauptseite > Publikationsdatenbank > Mechanistic insight into the formation of colloidal WS 2 nanoflakes in hot alkylamine media |
| Hauptseite > Publikationsdatenbank > Mechanistic insight into the formation of colloidal WS 2 nanoflakes in hot alkylamine media |
| Journal Article | FZJ-2020-02664 |
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2019
Royal Society of Chemistry
Cambridge
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Please use a persistent id in citations: http://hdl.handle.net/2128/25439 doi:10.1039/C9NA00279K
Abstract: Developing convenient and reliable synthetic methodologies for solution processable 2D layered ultrathin nanostructures with lateral size control is one of the major challenges for practical applications. In this study, a rational understanding a long-chain amphiphilic surfactant assisted non-hydrolytic synthesis that is able to generate dimension-controllable 2D-WS2 nanocrystal flakes in a single-step protocol is proposed. The evolution of the starting soft organic–inorganic lamellar template into ultrathin few-layer 2D-WS2 nanostructures with lateral size modulation over a range between 3 and 30 nm is monitored. The initial formation of WS2 nanoseeds occurs in a self-assembled sacrificial precursor source, acting as a template, where larger two-dimensional nanostructures can grow without undergoing significant thickness variation. Overall, the chemical nature and steric hindrance of the alkylamines are essential to modulate the reactivity of such WS2 nanoclusters, which correlate with the lateral size of the resulting nanoflakes
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