Miniemulsions as chemical nanoreactors for the room temperature synthesis of inorganic crystalline nanostructures: ZnO colloids (Articolo in rivista)

Type
Label
  • Miniemulsions as chemical nanoreactors for the room temperature synthesis of inorganic crystalline nanostructures: ZnO colloids (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/c1jm13301b (literal)
Alternative label
  • Paolo Dolcet, Maurizio Casarin, Chiara Maccato, Laura Bovo, Gloria Ischia, Stefano Gialanella, Fabrizio Mancin, Eugenio Tondello, Silvia Gross (2012)
    Miniemulsions as chemical nanoreactors for the room temperature synthesis of inorganic crystalline nanostructures: ZnO colloids
    in Journal of materials chemistry (Online); The Royal Society of Chemistry, Cambridge (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Paolo Dolcet, Maurizio Casarin, Chiara Maccato, Laura Bovo, Gloria Ischia, Stefano Gialanella, Fabrizio Mancin, Eugenio Tondello, Silvia Gross (literal)
Pagina inizio
  • 1620 (literal)
Pagina fine
  • 1626 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 22 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • aDipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo, 1, I-35131 Padova, Italy. E-mail: silvia.gross@unipd.it bIstituto di Scienze e Tecnologie Molecolari, ISTM-CNR, via Marzolo, 1, I-35131 Padova, Italy cCurrent address: London Centre for Nanotechnology, 17-19 Gordon Street, London, WC1H 0AH dDipartimento di Ingegneria dei Materiali e Tecnologie Industriali, Via Mesiano 77, 38123 Trento, Italy (literal)
Titolo
  • Miniemulsions as chemical nanoreactors for the room temperature synthesis of inorganic crystalline nanostructures: ZnO colloids (literal)
Abstract
  • We successfully explored, for the first time, the use of the w/o inverse miniemulsion route to prepare surfactant-functionalised nanocrystalline ZnO colloids. The adopted route exploits the micelles as nanoreactors for the precipitation of the desired oxide in a confined space. Triton X-100 (TritX-), sodium dodecyl sulfate (SDS-) and polyvinylpyrrolidone (PVP-) coated ZnO crystalline nanoparticles (NPs) have been obtained at room temperature (RT) with no need for post-treatment, by precipitation of zinc chloride with ammonium or sodium hydroxide into w/o inverse micelles. Their hydrodynamic diameter, evaluated by Dynamic Light Scattering (DLS), is about 35 nm. X-Ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES), Fourier Transform Infrared (FT-IR) spectroscopy and Thermogravimetric Analysis (TGA) have been used to characterize powders separated by miniemulsions. The NP inorganic core is constituted of wurtzite ZnO, with a high degree of crystallinity, as determined by XRD. XRD data and TEM images revealed the formation, in the case of ZnOTritX, of anisotropic plate-like crystallites, with an average diameter of 72 nm and a thickness of 15-20 nm. The RT photo-luminescent (PL) spectrum of ZnOPVP NPs shows a strong UV emission band, attributed to the free exciton recombination, with a relevant tail in the Vis region due to the presence of structural defects. The morphology of these systems, investigated by SEM, corresponds to a homogeneous dispersion of globular sponge structures in a compact and fibrous matrix. (literal)
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