Particle sizing using q-dependent DLS-OCT

Konstantine Cheishvili

doi:10.1117/12.3016251

20 June 2024 Particle sizing using q-dependent DLS-OCT

Konstantine Cheishvili

Proceedings Volume PC13006, Biomedical Spectroscopy, Microscopy, and Imaging III; PC130061C (2024) https://doi.org/10.1117/12.3016251
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

We demonstrated the application of wavenumber-dependent DLS-OCT to measure both collective and self-diffusion coefficients in concentrated silica suspensions. Depending on the sample polydispersity, we successfully measured either long-time collective or long-time self-diffusion over a broad q-range using our custom-built OCT system. The measured collective diffusion coefficient shows excellent agreement with hard-sphere theory, providing further evidence for the dynamic scaling property. It also serves as an effective tool for accurately determining particle sizes in concentrated suspensions. We found the decoupling approximation to be highly effective in describing the first-order normalized autocovariance functions in both monodisperse and relatively polydisperse samples.

Citation Download Citation

Konstantine Cheishvili "Particle sizing using q-dependent DLS-OCT", Proc. SPIE PC13006, Biomedical Spectroscopy, Microscopy, and Imaging III, PC130061C (20 June 2024); https://doi.org/10.1117/12.3016251

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