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Polarization-Multiplexed Dynamic Light Scattering: Characterizing Rotational Diffusion and Shape of Optically Anisotropic Particles

DOKPE

  • 2026
Published in:
  • Analytical Chemistry. - American Chemical Society (ACS). - 2026, vol. 98, no. 14, p. 10302-10308
Dynamic Light Scattering
Rotational Diffusion
Optically Anisotropic Particles
Nanoparticles
Polarization Scattering
English Rotational diffusion and shape analysis of optically anisotropic particles, such as the length and aspect ratio, is widely considered to be beyond the capabilities of standard batch-mode single-angle dynamic light scattering, which, unlike polarized and depolarized dynamic light scattering, does not benefit from multiangle and polarization-selective detection. Most desktop instruments lack these features; therefore, they are considered incapable of providing information about rotational diffusion and particle shape. Here we demonstrate that one can characterize rotational diffusion and the shape of particles with optical anisotropy without the use of any polarization filters, even at a single angle. By using a conventional desktop instrument with forward scattering low-angle detection, we demonstrate our approach by characterizing the principal dimensions and aspect ratios of gold nanostars, gold nanorods, and hematite spindles. Our approach opens up new possibilities that were previously inaccessible to users of standard dynamic light scattering.
Faculty
Faculté des sciences et de médecine
Department
NCCR - Bio-Inspired Materials
Language
  • English
Classification
Analytical chemistry
Other electronic version

Version en ligne

License
CC BY
Open access status
hybrid
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/335244
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