Synthesis and characterization of manganese-doped silicon nanoparticles: bifunctional paramagnetic-optical nanomaterial

Xiaoming Zhang; Marcin Brynda; R David Britt; Elizabeth C Carroll; Delmar S Larsen; Angelique Y Louie; Susan M Kauzlarich

doi:10.1021/ja074144q

Synthesis and characterization of manganese-doped silicon nanoparticles: bifunctional paramagnetic-optical nanomaterial

J Am Chem Soc. 2007 Sep 5;129(35):10668-9. doi: 10.1021/ja074144q. Epub 2007 Aug 11.

Authors

Xiaoming Zhang¹, Marcin Brynda, R David Britt, Elizabeth C Carroll, Delmar S Larsen, Angelique Y Louie, Susan M Kauzlarich

Affiliation

¹ Department of Biomedical Engineering, University of California, Davis, California 95616, USA.

Abstract

Mn doped Si nanoparticles have been synthesized via a low temperature solution route and characterize by X-ray powder diffraction, TEM, optical and emission spectroscopy and by EPR. The particle diameter was 4 nm and the surface was capped by octyl groups. 5% Mn doping resulted in a green emission with slightly lower quantum yield than undoped Si nanoparticles prepared by the same method. Mn²⁺ doped into the nanoparticle is confirmed by epr hyperfine and the charge carrier dynamics were probed by ultrafast transient absorption spectroscopy. Both techniques are consistent with Mn²⁺ on or close to the surface of the nanoparticle.

Publication types

Research Support, N.I.H., Extramural

MeSH terms

Electron Spin Resonance Spectroscopy
Manganese / chemistry*
Microscopy, Electron, Transmission
Nanoparticles / chemistry*
Silicon / chemistry*
Spectrum Analysis / methods

Substances

Manganese
Silicon

Abstract

Publication types

MeSH terms

Substances

Grants and funding