New measurement method of complex electrophoretic mobility of charged colloids by quasi-elastic light scattering

Daisuke Mizuno, Yasuyuki Kimura, Reinosuke Hayakawa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A new measurement method of complex electrophoretic mobility μ* of colloidal particles in suspension was developed using a heterodyne technique of quasi-elastic light scattering under a sinusoidal electric field. The influence of diffusion was removed by squaring the time-domain signal of scattered light and we succeeded in accurate and highly sensitive measurement of μ* in a wide frequency range for the first time. The frequency dependence of μ* of latex particles was measured up to 50 kHz by this method. The relaxation of mobility due to anomalous double-layer polarization was observed above 1 kHz in the obtained spectrum.

Original languageEnglish
Pages (from-to)L1197-L1199
JournalJapanese journal of applied physics
Volume39
Issue number11 B
DOIs
Publication statusPublished - Nov 15 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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