Synthesis and Characterization of Manganese-Doped Silicon Nanoparticles: Bifunctional Paramagnetic-Optical Nanomaterial

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• 作者：Xiaoming Zhang ; Marcin Brynda ; R. David Britt ; Elizabeth C. Carroll ; Delmar S. Larsen ; Angelique Y. Louie ; Susan M. Kauzlarich
• 刊名：Journal of the American Chemical Society
• 出版年：2007
• 出版时间：September 5, 2007
• 年：2007
• 卷：129
• 期：35
• 页码：10668 - 10669
• 全文大小：312K
• 年卷期：v.129,no.35(September 5, 2007)
• ISSN：1520-5126

文摘

Mn doped Si nanoparticles have been synthesized via a low-temperature solution route and characterized by X-ray powder diffraction, transmission electron microscopy, optical and emission spectroscopy, and by electron paramagnetic resonance (EPR). The particle diameter was 4 nm, and the surface was capped by octyl groups. Mn doping at 5% resulted in a green emission with a 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.