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- W199744908 abstract "A single-step in-flight microplasma synthesis of alkyl-terminated blue-luminescent silicon nanocrystals (Si-NCs) is presented. A mixture of silicon tetrachloride and methane is activated in a medium-pressure (20 kPa), miniaturized (200 μl) non-thermal plasma reactor. Hydrogen species derived from methane abstract chlorine from SiCln efficiently, while partially decomposed methane fragments terminate Si-NC surface. A miniaturized reactor works as short-residence-time reactor which suppresses excess crystal growth, leading to monodispersed 2 nm crystalline particles. Although gas temperature of the microplasma is elevated up to 1000 K, crystalline nanoparticles are obtainable at room temperature in the sense that no heating devise or high temperature post-annealing is required. As-produced Si-NCs are fully passivated by short chain alkyl groups: Si-NCs are readily suspended into toluene and glow bright blue-photoluminescence (440 nm) upon irradiating UV light source. Indirect electron-hole recombination seems to dominate luminescence mechanism in the present Si-NCs." @default.
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- W199744908 date "2009-01-01" @default.
- W199744908 modified "2023-09-26" @default.
- W199744908 title "In-flight Microplasma Synthesis of Luminescent Silicon Nanocrystals" @default.
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