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An Insight into Chemistry and Structure of Colloidal 2D-WS2 Nanoflakes: Combined XPS and XRD Study.
Scarfiello, Riccardo; Mazzotta, Elisabetta; Altamura, Davide; Nobile, Concetta; Mastria, Rosanna; Rella, Simona; Giannini, Cinzia; Cozzoli, Pantaleo Davide; Rizzo, Aurora; Malitesta, Cosimino.
Afiliación
  • Scarfiello R; Institute of Nanotechnology, Campus Ecotekne, CNR NANOTEC, via Monteroni, 73100 Lecce, Italy.
  • Mazzotta E; Department of Biological and Environmental Sciences and Technologies, Campus Ecotekne, University of Salento, via Monteroni, 73100 Lecce, Italy.
  • Altamura D; Institute of Crystallography, IC CNR, via Amendola 122/O, 70126 Bari, Italy.
  • Nobile C; Institute of Nanotechnology, Campus Ecotekne, CNR NANOTEC, via Monteroni, 73100 Lecce, Italy.
  • Mastria R; Institute of Nanotechnology, Campus Ecotekne, CNR NANOTEC, via Monteroni, 73100 Lecce, Italy.
  • Rella S; Department of Biological and Environmental Sciences and Technologies, Campus Ecotekne, University of Salento, via Monteroni, 73100 Lecce, Italy.
  • Giannini C; Institute of Crystallography, IC CNR, via Amendola 122/O, 70126 Bari, Italy.
  • Cozzoli PD; Department of Mathematics and Physics "E. De Giorgi", Campus Ecotekne, University of Salento, via Arnesano, 73100 Lecce, Italy.
  • Rizzo A; UdR INSTM di Lecce, c/o, Campus Ecotekne, Universy of Salento, via Arnesano, 73100 Lecce, Italy.
  • Malitesta C; Institute of Nanotechnology, Campus Ecotekne, CNR NANOTEC, via Monteroni, 73100 Lecce, Italy.
Nanomaterials (Basel) ; 11(8)2021 Jul 30.
Article en En | MEDLINE | ID: mdl-34443800
The surface and structural characterization techniques of three atom-thick bi-dimensional 2D-WS2 colloidal nanocrystals cross the limit of bulk investigation, offering the possibility of simultaneous phase identification, structural-to-morphological evaluation, and surface chemical description. In the present study, we report a rational understanding based on X-ray photoelectron spectroscopy (XPS) and structural inspection of two kinds of dimensionally controllable 2D-WS2 colloidal nanoflakes (NFLs) generated with a surfactant assisted non-hydrolytic route. The qualitative and quantitative determination of 1T' and 2H phases based on W 4f XPS signal components, together with the presence of two kinds of sulfur ions, S22- and S2-, based on S 2p signal and related to the formation of WS2 and WOxSy in a mixed oxygen-sulfur environment, are carefully reported and discussed for both nanocrystals breeds. The XPS results are used as an input for detailed X-ray Diffraction (XRD) analysis allowing for a clear discrimination of NFLs crystal habit, and an estimation of the exact number of atomic monolayers composing the 2D-WS2 nanocrystalline samples.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Qualitative_research Idioma: En Revista: Nanomaterials (Basel) Año: 2021 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Suiza

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Qualitative_research Idioma: En Revista: Nanomaterials (Basel) Año: 2021 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Suiza