Easy-use and low-cost fiber-based two-color dynamic light-scattering apparatus

6533b7dcfe1ef96bd1272194

RESEARCH PRODUCT

Easy-use and low-cost fiber-based two-color dynamic light-scattering apparatus

Hans Joachim Schöpe Achim Lederer

subject

Materials science Light Cross-correlation Scattering business.industry Color Equipment Design Radiation Equipment Failure Analysis Refractometry symbols.namesake Optics Dynamic light scattering Nephelometry and Turbidimetry Goniometer symbols Scattering Radiation Particle Rayleigh scattering Suspension (vehicle)business Lighting

description

We present a small and compact two-color cross-correlation light-scattering setup designed to study the structure and dynamics of colloidal suspensions in the regime of considerable turbidity. Using a homemade concentric four-arm goniometer, combined with fiber-optical illumination and detection devices, allows an easy and long time stable alignment-even under a temperature variation of ∼5 °C. Tests with a nearly multiple scattering free suspension of small Rayleigh scatterers show intercepts in cross correlation near 0.4 over a wide range of scattering angles from 20° to 150°. Measuring slightly turbid samples in cross-correlation mode multiple scattering is sufficiently suppressed allowing the determination of multiple scattering free dynamic structure factors as well as particle form factors.

year	journal	country	edition	language
2011-12-22	Physical Review E

https://doi.org/10.1103/physreve.85.031401

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