A Depolarized Dynamic Light Scattering Method to Calculate Translational and Rotational Diffusion Coefficients of Nanorods

Nixon-Luke, R and Bryant, G 2019, 'A Depolarized Dynamic Light Scattering Method to Calculate Translational and Rotational Diffusion Coefficients of Nanorods', Particle and Particle Systems Characterization, vol. 36, no. 2, pp. 1-7.


Document type: Journal Article
Collection: Journal Articles

Title A Depolarized Dynamic Light Scattering Method to Calculate Translational and Rotational Diffusion Coefficients of Nanorods
Author(s) Nixon-Luke, R
Bryant, G
Year 2019
Journal name Particle and Particle Systems Characterization
Volume number 36
Issue number 2
Start page 1
End page 7
Total pages 7
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
Abstract A new analysis of depolarized dynamic light scattering data is presented, which allows the unambiguous determination of rotational and translational diffusions coefficients of nanorods in suspension. By visualizing data scaling, purely translational diffusive motions can be isolated from vertically polarized scattering, allowing the unique determination of rotational diffusion from the depolarized scattering. The method is applied to nanorods with four different aspect ratios, and compared with theoretical predictions. Diffusion coefficients obtained show good agreement with calculations based on the direct measurements of rod length and diameter. Where the theories are shown to be valid, the method allows the measurement of statistically meaningful particle sizes and aspect ratios.
Subject Soft Condensed Matter
DOI - identifier 10.1002/ppsc.201800388
Copyright notice © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN 0934-0866
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