微乳液
聚芴
量子点
材料科学
聚合
纳米颗粒
光化学
电致发光
纳米技术
化学工程
聚合物
化学
复合材料
工程类
图层(电子)
作者
Carla Negele,Johannes Haase,Alfred Leitenstorfer,Stefan Mecking
出处
期刊:ACS Macro Letters
[American Chemical Society]
日期:2012-11-01
卷期号:1 (11): 1343-1346
被引量:33
摘要
Suzuki-Miyaura polycondensation of 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-7-bromo-9,9-dioctylfluorene in aqueous miniemulsion with only two equivalents of NaOH as a base yields colloidally stable nanoparticles of polyfluorene with Mn ca. 2 × 104 g mol-1 and particle sizes of 40-85 nm, depending on the surfactant concentration. Polymerization in the presence of CdSe/CdS core/shell quantum dots affords hybrid nanoparticles of nonaggregated quantum dots, in particular nanoparticles composed of a single quantum dot embedded in a polyfluorene shell. Microphotoluminescence spectroscopy on single hybrid particles reveals an enhanced photostability of the quantum dots and indicates an efficient Förster energy transfer from the polyfluorene shell to the quantum dot.
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