Esteves Ana C C, Bombalski Lindsay, Trindade Tito, Matyjaszewski Krzysztof, Barros-Timmons Ana
CICECO, Departamento de Química, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
Small. 2007 Jul;3(7):1230-6. doi: 10.1002/smll.200600510.
We report the synthesis of CdS quantum dot (QD)-poly(acrylate) nanocomposites using a recently developed catalytic system where activators are generated by electron transfer for atom-transfer radical polymerization (ATRP) in a miniemulsion. The QD surface was functionalized with a tris(alkyl)phosphine, previously modified with an ATRP chlorine initiator, and subsequent controlled polymerization was carried out from the functionalized surface of nanoparticles. The final material showed a high homogeneity and the QDs were evenly dispersed. The optical-absorption edge in the visible spectra of the nanocomposites attests the presence of the CdS QDs. Quantum confinement effects were assigned, though a blue shift in relation to the optical spectrum of the initial QDs has been observed.
我们报道了使用一种最近开发的催化体系合成硫化镉量子点（QD）-聚丙烯酸酯纳米复合材料，该体系中通过电子转移产生引发剂用于微乳液中的原子转移自由基聚合（ATRP）。量子点表面用三（烷基）膦进行功能化，该三（烷基）膦预先用ATRP氯引发剂进行了修饰，随后从纳米颗粒的功能化表面进行可控聚合。最终材料显示出高均匀性，量子点均匀分散。纳米复合材料可见光谱中的光吸收边缘证明了硫化镉量子点的存在。尽管观察到相对于初始量子点光谱有蓝移，但仍归因于量子限域效应。
