Capillary electrophoresis of ultrasmall carboxylate functionalized silicon nanoparticles
- Author(s): Eckhoff, DA
- Stuart, JN
- Sutin, JDB
- Sweedler, JV
- Gratton, E
- et al.
Published Web Locationhttps://doi.org/10.1063/1.2345366
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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