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将聚乙烯醇(PVA)作为分子骨架,与CdTe量子点和聚丙烯酸(PAA)作用形成复合纳米胶体,证明通过水相合成法可以很好地改善量子点的水溶性并避免了油相合成得到的量子点在配体交换过程中发生的荧光降低问题.研究发现,当pH值发生变化时,由于PAA质子化程度不同而导致分子伸展程度产生差异,使得量子点在PVA骨架分子中的空间位置发生了相对移动从而引起荧光性质的变化,以此建立了一种新的pH传感器.
Polyvinyl alcohol (PVA) as the molecular framework, and CdTe quantum dots and polyacrylic acid (PAA) to form a composite nano-colloid, water phase synthesis method can be proved to be good to improve the water solubility of quantum dots and to avoid oil phase synthesis obtained Of the quantum dots in the ligand exchange process of fluorescence reduction.Studies found that when the pH value changes due to the different degree of protonation PAA molecular stretching caused by differences in the quantum dots in the PVA molecular framework of the molecular location A relative movement has taken place, causing changes in the fluorescence properties, thus establishing a new pH sensor.