Journal article Open Access

Mechanistic insight into the formation of colloidal WS2 nanoflakes in hot alkylamine media

Scarfiello, Riccardo


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{
  "DOI": "10.1039/c9na00279k", 
  "author": [
    {
      "family": "Scarfiello, Riccardo"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2020, 
        5, 
        20
      ]
    ]
  }, 
  "abstract": "<p>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-WS<sub>2</sub>&nbsp;nanocrystal flakes in a single-step protocol is proposed. The evolution of the starting soft organic&ndash;inorganic lamellar template into ultrathin few-layer 2D-WS<sub>2</sub>&nbsp;nanostructures with lateral size modulation over a range between 3 and 30 nm is monitored. The initial formation of WS<sub>2</sub>&nbsp;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 WS<sub>2</sub>&nbsp;nanoclusters, which correlate with the lateral size of the resulting nanoflakes.</p>", 
  "title": "Mechanistic insight into the formation of colloidal WS2 nanoflakes in hot alkylamine media", 
  "type": "article-journal", 
  "id": "3836167"
}
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