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Capillary electrophoresis of ultrasmall carboxylate functionalized silicon nanoparticles.

  • Author(s): Eckhoff, Dean A
  • Stuart, Jeffrey N
  • Sutin, Jason DB
  • Sweedler, Jonathan V
  • Gratton, Enrico
  • et al.

Published Web Location

https://doi.org/10.1063/1.2345366Creative Commons 'BY' version 4.0 license
Abstract

Capillary electrophoresis is used to separate ultrasmall ( approximately 1 nm) carboxylate functionalized Si nanoparticles (Si-np-COO(-)) prepared via hydrosilylation with an omega-ester 1-alkene. The electropherograms show a monodisperse Si core size with one or two carboxylate groups added to the surface. On-column detection of their laser-induced fluorescence demonstrates that the individual Si-np-COO(-) have narrow emissions (full width at half maximum = 30-40 nm) with a nearly symmetric lineshape. Preparative scale electrophoresis should be a viable route for purification of the Si-np-COO(-) for further study and future applications.

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