Studying the size/shape separation and optical properties of silver nanoparticles by capillary electrophoresis

Fu Ken Liu, Fu-Hsiang Ko, Pei Wen Huang, Chien Hou Wu, Tieh Chi Chu

Research output: Contribution to journalArticlepeer-review

130 Scopus citations

Abstract

This paper describes the feasibility of employing capillary electrophoresis (CE) to separate silver particles in nanometer regimes. We have found that the addition of an anionic surfactant, sodium dodecyl sulphate (SDS), to the running electrolyte prevents coalescence of the silver particles during the process, which improves the separation performance; the concentration of SDS required for optimal silver nanoparticle separation is ca. 20 mM. By monitoring the electropherograms using a diode-array detection (DAD) system, we have also investigated the separation of suspended silver nanorods with respect to their shapes. Our results demonstrate that the combination of CE and DAD is a powerful one for the separation and characterization of various silver nanoparticles.

Original languageEnglish
Pages (from-to)139-145
Number of pages7
JournalJournal of Chromatography A
Volume1062
Issue number1
DOIs
StatePublished - 7 Jan 2005

Keywords

  • Capillary electrophoresis
  • Silver nanoparticles
  • Size and shape separation

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