Size-controllable enhanced energy transfer from an amphiphilic conjugated-ionic triblock copolymer to CdTe quantum dots in aqueous medium

被引：11

作者：

Fang, Chun ^{[1
]}

Zhao, Bao-Min ^{[1
]}

Lu, Hao-Ting ^{[1
]}

Sai, Li-Man ^{[1
]}

Fan, Qu-Li ^{[2
]}

Wang, Lian-Hui ^{[1
]}

Huang, Wei ^{[2
]}

机构：

[1] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China

[2] Nanjing Univ Posts & Telecommun, Inst Adv Mat, Nanjing 210003, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 18期

关键词：

D O I：

10.1021/jp076427a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, we have studied the interaction in aqueous solution between a polyfluorene-containing amphiphilic conjugated-ionic triblock copolymer poly(2-(trimethylamino)ethyl methacrylate)-polyfluorene-poly(2(trimethylamino)ethyl methacrylate) (PTMAEMA-PF-PTMAEMA) and CdTe quantum dots with emission maxima at 550, 580, and 610 nm. We demonstrate by steady-state photoluminescence spectra, photoluminescence excitation spectra, and time-resolved fluorescence spectra that efficient fluorescence resonance energy transfer has occurred from the polymer as the energy donor to CdTe quantum dots that served as acceptors. The Forster radius and average donor-acceptor distances are estimated from experimentally measured energy transfer efficiency. We have observed that a more effective FRET process occurred in the larger-sized QDs and polymer blended systems both from steady-state fluorescence spectra and time-resolved fluorescence spectra.

引用

页码：7278 / 7283

页数：6