Dynamics of micron-sized particles in dilute and concentrated suspensions probed by dynamic ultrasound scattering techniques

Tomoyuki Konno; Tomohisa Norisuye; Kazuki Sugita; Hideyuki Nakanishi; Qui Tran-Cong-Miyata

doi:10.1016/j.ultras.2015.10.022

Dynamics of micron-sized particles in dilute and concentrated suspensions probed by dynamic ultrasound scattering techniques

Ultrasonics. 2016 Feb:65:59-68. doi: 10.1016/j.ultras.2015.10.022. Epub 2015 Oct 31.

Authors

Tomoyuki Konno¹, Tomohisa Norisuye², Kazuki Sugita¹, Hideyuki Nakanishi¹, Qui Tran-Cong-Miyata¹

Affiliations

¹ Department of Macromolecular Science and Engineering, Graduate School of Science & Technology, Kyoto Institute of Technology Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
² Department of Macromolecular Science and Engineering, Graduate School of Science & Technology, Kyoto Institute of Technology Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. Electronic address: nori@kit.jp.

PMID: 26547118
DOI: 10.1016/j.ultras.2015.10.022

Abstract

A novel ultrasound technique called Frequency-Domain Dynamic ultraSound Scattering (FD-DSS) was employed to determine sedimentation velocities and the diameters of microparticles in a highly turbid suspension. The paper describes the importance of the scattering vector q for dynamic scattering experiments using broadband ultrasound pulses because q (or frequency) corresponds to the spatial length scale whereas the pulses involve inevitable uncertainty in the time domain due to the frequency distribution of broadband pulse. The results obtained from Stokes velocity of monodispersed silica and polydivinylbenzene (PDVB) particles were compared to those obtained by a Field Emission Scanning Electron Microscope (FE-SEM). A novel method to extract the particle size distribution is also demonstrated based on an ultrasound scattering theory.

Keywords: Microparticle; Scattering; Sedimentation; Size distribution.