Dynamic light scattering for particle characterization subjected to ultrasound: a study on compact particles and acousto-responsive microgels.

ABSTRACT: In this report, we investigate dynamic light scattering (DLS) from both randomly diffusing silica particles and acousto-responsive microgels in aqueous dispersions under ultrasonic vibration. Employing high-frequency ultrasound (US) with low amplitude ensures that the polymers remain intact without damage. We derive theoretical expressions for the homodyne autocorrelation function, incorporating the US term alongside the diffusion term. Subsequently, we successfully combined US with a conventional DLS system to experimentally characterize compact silica particles and microgels under the influence of US. Our model allows us to extract essential parameters, including particle size, frequency, and amplitude of particle vibration, based on the correlation function of the scattered light intens

SUBMITTER: Stock S 

PROVIDER: S-EPMC10781767 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature