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Updated: Feb 11, 2026

Asymmetrical Flow Field-Flow Fractionation for Sizing of Gold Nanoparticles in Suspension
Published on: September 11, 2020
On the extinction coefficient of light in non-absorbing nanoparticle suspensions
Abstract:
We assess the validity and possible use of a simple formula for the complex effective refractive index of a colloidal suspension of very small particles obtained from the quasi-crystalline approximation. This approximation takes into account the so-called dependent scattering effects, which are strongest, in relative terms, in suspensions of non-absorbing nanometer-sized particles. We test experimentally the predictions of the model for the extinction of light in dispersions of sodium dodecyl sulfate micelles in tri-distilled water. We find that the theoretical model can be fitted to the experimental data and provide estimates of the micelles' size and the minimum distance between each other in suspension.
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