Your browser doesn't support javascript.
loading
Porosity of silica Stöber particles determined by spin-echo small angle neutron scattering.
Parnell, S R; Washington, A L; Parnell, A J; Walsh, A; Dalgliesh, R M; Li, F; Hamilton, W A; Prevost, S; Fairclough, J P A; Pynn, R.
Afiliación
  • Parnell SR; Faculty of Applied Sciences, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands. S.R.Parnell@tudelft.nl and Centre for Exploration of Energy and Matter, Indiana University, Bloomington, 47408, USA.
  • Washington AL; Department of Physics and Astronomy, The University of Sheffield, Sheffield, S3 7RH, UK and Department of Mechanical Engineering, The University of Sheffield, Sheffield, S1 3DJ, UK.
  • Parnell AJ; Department of Physics and Astronomy, The University of Sheffield, Sheffield, S3 7RH, UK.
  • Walsh A; Department of Chemistry, The University of Sheffield, Sheffield, S3 7HF, UK.
  • Dalgliesh RM; ISIS, Rutherford Appleton Laboratory, Chilton, Oxfordshire, OX11 0QX, UK.
  • Li F; Centre for Exploration of Energy and Matter, Indiana University, Bloomington, 47408, USA.
  • Hamilton WA; Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, 37831, USA.
  • Prevost S; ID02 Beamline, European Synchrotron Radiation Facility, F38043, Grenoble, France.
  • Fairclough JP; Department of Mechanical Engineering, The University of Sheffield, Sheffield, S1 3DJ, UK.
  • Pynn R; Centre for Exploration of Energy and Matter, Indiana University, Bloomington, 47408, USA and Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, 37831, USA.
Soft Matter ; 12(21): 4709-14, 2016 May 25.
Article en En | MEDLINE | ID: mdl-27021920
Stöber silica particles are used in a diverse range of applications. Despite their widespread industrial and scientific uses, information on the internal structure of the particles is non-trivial to obtain and is not often reported. In this work we have used spin-echo small angle neutron scattering (SESANS) in conjunction with ultra small angle X-ray scattering (USAXS) and pycnometry to study an aqueous dispersion of Stöber particles. Our results are in agreement with models which propose that Stöber particles have a porous core, with a significant fraction of the pores inaccessible to solvent. For samples prepared from the same master sample in a range of H2O : D2O ratio solutions we were able to model the SESANS results for the solution series assuming monodisperse, smooth surfaced spheres of radius 83 nm with an internal open pore volume fraction of 32% and a closed pore fraction of 10%. Our results are consistent with USAXS measurements. The protocol developed and discussed here shows that the SESANS technique is a powerful way to investigate particles much larger than those studied using conventional small angle scattering methods.
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Soft Matter Año: 2016 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Soft Matter Año: 2016 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido