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Light Scattering of SiO Monodisperse Microspheres Prepared by the Sol-Gel Route

Published online by Cambridge University Press:  25 February 2011

E. Ziemath ,
M. A. Aegerter ,
J. Moreira ,
M. Figueiredo  and
J. Zarzycki
E. Ziemath
Affiliation:
Instituto de Física e Química de São Carlos, University of São Paulo, Cx. Postai 369, 13560 São Carlos, SP (Brasil)
M. A. Aegerter
Affiliation:
Instituto de Física e Química de São Carlos, University of São Paulo, Cx. Postai 369, 13560 São Carlos, SP (Brasil)
J. Moreira
Affiliation:
Departamento de Fisica, Federai University of Ceara, Cx. Postal 3004, Fortaleza, CE (Brasil)
M. Figueiredo
Affiliation:
Departamento de Fisica, Federai University of Ceara, Cx. Postal 3004, Fortaleza, CE (Brasil)
J. Zarzycki
Affiliation:
Laboratoire des Sciences des Materiaux Vitreux, University of Montpellier (France)
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Abstract

SiO microspheres have been prepared from TMOS/Methanol/water sols in basic condition (pH ≃ 12) by the Stöber method and studied by TEM static and dynamic light scattering techniques in order to determine the mean size Ṝ size distribution, hydrodynamic radius RH, radius of gyration RG and translational diffusion coefficient Dt; the ratio RH/RG was found less than 0.55 and the aggregates have a fractal geometry with df ∼ 2.3 ± 0.05. The results are compared to previous work on colloidal silica aggregates prepared by other techniques and discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 121: Symposium H – Better Ceramics Through Chemistry III , 1988 , 311
Copyright
Copyright © Materials Research Society 1988

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References

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