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One-Pot Synthesis of Alkyl-Terminated Silicon Nanoparticles by Solution Reduction

표면 알킬기를 갖는 실리콘 나노입자의 One-Pot 용액환원 합성

  • Published : 2011.10.01

Abstract

Silicon nanoparticles have attracted a great deal of scientific interests due to its intense photoluminescence in the visible spectral region and its potential applications in biological fluorescence maker, RGB (red, green, blue) display, photonics and photovoltaics etc. Practical applications making use of optical and physicochemical properties of Si nanoparticles requires an efficient synthetic method which allows easy modulation of their size, size distribution as well as surface functionalities etc. In this study, a one-pot solution reduction scheme is attempted to prepare alkyl-terminated Si nanoparticles (<10 nm) with Si precursors, (Octyl)$SiCl_3$ or mixture of (Octyl)$SiCl_3$ and $SiCl_4$, containing alkyl-groups using Na(naphthalide) as reducing agent. The surface capping of Si nanoparticles with octyl-groups as well as Si nanoparticle formation was achieved in one-pot reaction. The hexane soluble Si nanoparticles with octyl-termination were in the range of 2-10 nm by TEM and some oxide groups (Si-O-Si) was present on the surface by EDS/FTIR analyses. The optical properties of Si nanoparticles measured by UV-vis and PL evidenced that photoluminescent Si nanoparticles with alkyl-termination was successfully synthesized by solution reduction of alkyl-containing Si precursors in one-pot reaction.

Keywords

Si Nanoparticles;Solution Reduction;Na(naphthalide);Photoluminescence;Tetrachlorosilane;Octyltrichlorosilane

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