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A new solution route to hydrogen-terminated silicon nanoparticles: synthesis, functionalization and water stability

机译：氢封端的硅纳米颗粒的新解决方案：合成，功能化和水稳定性

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摘要

Hydrogen-capped silicon nanoparticles with strong blue photoluminescence were synthesized by the metathesis reaction of sodium silicide, NaSi, with NH4Br. The hydrogen-capped Si nanoparticles were further terminated with octyl groups and then coated with a polymer to render them water-soluble. The nanoparticles were characterized by TEM, FT-IR, UV-vis absorption and photoluminescence. The Si nanoparticles were shown to have an average diameter of 3.9 +/- 1.3 nm and exhibited room temperature photoluminescence with a peak maximum at 438 nm with a quantum efficiency of 32% in hexane and 18% in water; the emission was stable in ambient air for up to 2 months. These nanoparticles could hold great potential as a non-heavy-element-containing quantum dot for applications in biology.
机译：通过硅化钠NaSi与NH4Br的复分解反应合成了具有强蓝色光致发光的氢封端的硅纳米粒子。氢封端的Si纳米颗粒进一步用辛基封端，然后用聚合物涂覆使其具有水溶性。通过TEM，FT-IR，UV-vis吸收和光致发光来表征纳米颗粒。硅纳米粒子的平均直径为3.9 +/- 1.3纳米，并表现出室温光致发光特性，其最大峰值在438 nm处，在己烷中的量子效率为32％，在水中为18％;排放在环境空气中稳定达2个月。这些纳米粒子具有巨大的潜力，可以用作生物学中的非重元素量子点。

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