Mesostructured silica aerosol particles: Comparison of gas-phase and powder deposit X-ray diffraction data (Articolo in rivista)

Type
Label
  • Mesostructured silica aerosol particles: Comparison of gas-phase and powder deposit X-ray diffraction data (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/la104892s (literal)
Alternative label
  • Shyjumon, I.a, Rappolt, M., Sartori, B., Cacho-Nerin, F., Grenci, G., Laggner, P., Amenitsch, H (2011)
    Mesostructured silica aerosol particles: Comparison of gas-phase and powder deposit X-ray diffraction data
    in Langmuir
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Shyjumon, I.a, Rappolt, M., Sartori, B., Cacho-Nerin, F., Grenci, G., Laggner, P., Amenitsch, H (literal)
Pagina inizio
  • 5542 (literal)
Pagina fine
  • 5548 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 27 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 9 (literal)
Note
  • Scopus (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Institute of Biophysics and Nanosystems Research, Austrian Academy of Sciences, Schmiedlstraße 6, 8042 Graz, Austria CNR-IOM Laboratorio Nazionale TASC, Strada Statale 14, km 163.5, 34012 Basovizza (TS), Italy Institute for Synchrotron Radiation, Karlsruhe Institute of Technology, Postfach 3640, D-76021, Germany (literal)
Titolo
  • Mesostructured silica aerosol particles: Comparison of gas-phase and powder deposit X-ray diffraction data (literal)
Abstract
  • We report on the characterization of mesostructured aerosol silica particles in the gas phase using in situ synchrotron small-angle X-ray scattering (SAXS) in order to unveil the influence of the basic production parameters. The investigated system was based on tetraethylorthosilicate (TEOS) as the inorganic precursor and on cetyltrimethyl-ammonium bromide (CTAB) as the surfactant. The heating temperature, surfactant to silicate ratio, and particle flow rate were thoroughly investigated, and for this purpose, an in-house-built aerosol reactor equipped with a special X-ray observation chamber was used. Complementary fine structural analysis was applied on dried deposits of the silica aerosols comprising direct Fourier transforms as well as simple two-phase model fits. This resulted in robust estimates for the silica wall thickness and surfactant core radius of the hexagonally ordered mesostructure. The particle shape and size distribution were examined by scanning electron microscopy (SEM). The quality of the inner nanostructure was revealed from an analysis of the peak width. The comparison of data from the gas phase and powder deposit shows that, in general, slower drying conditions (heating temperature about 80 °C) and a medium surfactant to Si ratio (about 0.14) lead to nanostructures of the best quality in terms of well-defined long-range organization. © 2011 American Chemical Society. (literal)
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