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Open Access Publications from the University of California

Capillary electrophoresis of ultrasmall carboxylate functionalized silicon nanoparticles

  • Author(s): Eckhoff, DA
  • Stuart, JN
  • Sutin, JDB
  • Sweedler, JV
  • Gratton, E
  • et al.

Published Web Location Commons Attribution 4.0 International Public License

Capillary electrophoresis is used to separate ultrasmall (∼1 nm) carboxylate functionalized Si nanoparticles (Si-np-COO-) prepared via hydrosilylation with an ω-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. © 2006 American Institute of Physics.

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