二乙烯基苯
材料科学
乳液聚合
光子上转换
纳米颗粒
动态光散射
发色团
聚合物
卟啉
化学工程
兴奋剂
聚合
光化学
微乳液
纳米技术
高分子化学
光电子学
肺表面活性物质
化学
共聚物
苯乙烯
复合材料
工程类
作者
Yoan C. Simon,Shuo Bai,Michelle K. Sing,Hervé Dietsch,Marc Achermann,Christoph Weder
标识
DOI:10.1002/marc.201100708
摘要
Examples of nanoscale low-power upconverting systems are rapidly increasing because of their potential application in numerous areas such as bioimaging or drug delivery. The fabrication of dye-doped cross-linked rubbery nanoparticles that exhibit upconversion even at relatively low power densities is reported here. The nanoparticles were prepared by surfactant-free emulsion polymerization of n-butylacrylate with divinylbenzene as a cross-linker, followed by dyeing of the resulting particles with a two-chromophore system composed of a palladium porphyrin sensitizer, and diphenylanthracene. Blue emission (≈440 nm) of these systems was observed upon excitation at 532 nm. In addition to their optical properties, the particles were characterized by electron microscopy and dynamic light scattering.
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