Static light scattering from microgel particles:model of variable dielectric permittivity

摘要

We perform static light scattering experiments on a dilute suspension of microgel particles and model the resultant form factors P(q) by assuming an exponentially decaying dielectric permittivity.The result is that P(q) 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.