Siberian Federal University, Svobodny Prospect 79, 660041 Krasnoyarsk, Russia.
Phys Chem Chem Phys. 2019 Feb 27;21(9):4831-4838. doi: 10.1039/c8cp07051b.
The photoluminescence (PL) properties of composites obtained by embedding green-emitting semiconductor nanocrystals (NCs) of two different types (thiol-capped CdTe and CdSe/ZnS) into chitosan-based biopolymer particles were investigated. The synthesis of self-assembled particles from oppositely charged polysaccharides involved a preliminary electrostatic binding of positively charged chitosan chains by negatively charged functional groups of NC stabilizing ligands. The amount of NCs and the acidity of the solution were found to be important parameters influencing the PL. The PL properties were mainly discussed in terms of the colloidal stability of the particles and changes in energy gap of NCs. Generally, the obtained biocompatible composites with NCs randomly distributed within a biopolymer particle demonstrated a higher PL resistance to the solution acidity that expands the applicability range of thiol-capped NCs.
研究了将两种不同类型（巯基封端的 CdTe 和 CdSe/ZnS）的绿光发射半导体纳米晶体（NCs）嵌入壳聚糖基生物聚合物颗粒中得到的复合材料的光致发光（PL）性质。通过带相反电荷的多糖之间的初步静电结合，由 NC 稳定配体的负电荷官能团来实现自组装颗粒的合成。NCs 的量和溶液的酸度被发现是影响 PL 的重要参数。PL 性质主要根据颗粒的胶体稳定性和 NCs 的能隙变化来讨论。一般来说，具有随机分布在生物聚合物颗粒内的 NCs 的所得生物相容性复合材料对溶液酸度具有更高的 PL 抗性，从而扩大了巯基封端 NCs 的适用范围。
