Refractive index matching of large polydisperse silica spheres in aqueous suspensions

Refractive index matching of large polydisperse silica spheres in aqueous suspensions Colloids and Surfaces A 538 (2018) 320–326 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Refractive index matching of large polydisperse silica spheres in aqueous suspensions Gualberto J. Ojeda-Mendoza, Humberto Contreras-Tello, Luis F. Rojas-Ochoa Departamento de Física, CINVESTAV-IPN,Av. Instituto Politécnico Nacional 2508, 07360, CDMX, Mexico GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: Standard synthesis protocols produce silicon dioxide (SiO ) particles with an inhomogeneous material dis- Silica particles tribution, which defines their optical properties. The inner structure and effective refractive index of the par- Light scattering ticles can be investigated by light scattering and optical contrast variation techniques. The standard analysis Refractive index relies on scattering models for particles smaller than the wavelength of the scattering probe, thus restricting its Core–shell use for a large variety of particle systems of academic and industrial interest. However, to overcome this dif- Mie theory ficulty should be possible by using the appropriate scattering model in the analysis. Here, SiO particles of size comparable to the wavelength of the illuminating source are dispersed at low particle number concentration in different mixtures of polar solvents to study the optical contrast. The angle-dependent scattered intensity from SiO particles suspended http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geoderma Elsevier

Refractive index matching of large polydisperse silica spheres in aqueous suspensions

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
0016-7061
eISSN
1872-6259
D.O.I.
10.1016/j.colsurfa.2017.10.088
Publisher site
See Article on Publisher Site

Abstract

Colloids and Surfaces A 538 (2018) 320–326 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Refractive index matching of large polydisperse silica spheres in aqueous suspensions Gualberto J. Ojeda-Mendoza, Humberto Contreras-Tello, Luis F. Rojas-Ochoa Departamento de Física, CINVESTAV-IPN,Av. Instituto Politécnico Nacional 2508, 07360, CDMX, Mexico GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: Standard synthesis protocols produce silicon dioxide (SiO ) particles with an inhomogeneous material dis- Silica particles tribution, which defines their optical properties. The inner structure and effective refractive index of the par- Light scattering ticles can be investigated by light scattering and optical contrast variation techniques. The standard analysis Refractive index relies on scattering models for particles smaller than the wavelength of the scattering probe, thus restricting its Core–shell use for a large variety of particle systems of academic and industrial interest. However, to overcome this dif- Mie theory ficulty should be possible by using the appropriate scattering model in the analysis. Here, SiO particles of size comparable to the wavelength of the illuminating source are dispersed at low particle number concentration in different mixtures of polar solvents to study the optical contrast. The angle-dependent scattered intensity from SiO particles suspended

Journal

GeodermaElsevier

Published: Feb 15, 2019

References

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