Static light scattering from microgel particles: model of variable dielectric permittivity.
We perform static light scattering experiments on a dilute suspension of microgel particles and model the resultant form factors Pq by assuming an exponentially decaying dielectric permittivity. The result is that Pq is a Lorentzian function of the scattering wavevector q for length scales greater than the particle size; the width approximately corresponding to twice the particle radius. This simple model reasonably accounts for scattered light from both swollen and shrunken microgel phases.
Fernández-Nieves
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Group of Complex Fluids Physics, Department of Applied Physics, University of Almería, 04120 Almería, Spain. afnieves@ual.es
de las Nieves
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FJ
Fernández-Barbero
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