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Highly luminescent CdSe/ZnS nanocrystals synthesized using a single-molecular ZnS source in a microfluidic reactor

机译:在微流控反应器中使用单分子ZnS源合成的高发光CdSe / ZnS纳米晶体

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摘要

An air-stable, low-toxicity, single-molecular source for ZnS is dernonstrated to be an appropriate reagent to synthesize highly luminescent ZnS-capped CdSe with a narrow size distribution. A photoluminescence quantum yield of above 50 % and a photoluminescence peak full width at half maximum of around 32 nm could be obtained after synthesis using a microreactor. The surface of the ZnS-capped CdSe nanocrystals can be hydrophilic, while retaining the high quantum yield. Microscopic observation shows that accurate time control, which could be achieved by using a microreactor, is important to avoid the formation of many isolated ZnS particles and the deterioration of the luminescence.
机译:ZnS的空气稳定,低毒,单分子来源被认为是合成窄尺寸分布的高发光ZnS包覆CdSe的合适试剂。使用微反应器合成后,可获得大于50%的光致发光量子产率和半峰附近的半峰处的光致发光峰全宽。 ZnS覆盖的CdSe纳米晶体的表面可以是亲水的,同时保留高量子产率。显微镜观察表明,通过使用微反应器可以实现精确的时间控制,这对于避免形成许多分离的ZnS颗粒和降低发光质量至关重要。

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