| CdS-ZnSe 和CdSe-ZnS量子点的合成和F?rster能量转移研究(英文) |
| Synthesis and F?rster Resonant Energy Transfer (FRET) Study of Quantum Dots Assembly |
| 作者 | 单位 | | 弓亚琼 | 中北大学化工与环境学院，太原 030051 | | 詹 寰 | Department of Chemistry, City College of the City University of New York, New York, 10031, USA | | 张贺楠 | Department of Chemistry, City College of the City University of New York, New York, 10031, USA | | 卫增岩 | Department of Chemistry, Hunter College of the City University of New York, New York, 10065, USA | | 苏 伟 | Department of Chemistry, Hunter College of the City University of New York, New York, 10065, USA |
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| 摘要: 采用分步合成法成功合成了CdS-ZnSe(Ⅰ型)和CdSe-ZnS (Ⅱ型)核-壳结构量子点。并首次构建了CdS-ZnSe/CdSe-ZnS结构F?rster能量转移对。利用吸收光谱(UV-Vis)，光致发光谱(PL)，时间分辨光致发光谱(TRPL)，透射电子显微镜(TEM)对比研究了不同配比的CdS-ZnSe/CdSe-ZnS结构Fö rster能量转移。分析结果表明：在能量转移发生时，CdS-ZnSe荧光强度显著下降，荧光寿命明显缩短，F?rster能量转移确实存在于CdS-ZnSe/CdSe-ZnS量子点之间。 |
| 关键词: FRET 量子点 荧光 时间分辨光致发光谱 |
| 基金项目: |
| Abstract: One F?rster resonant energy transfer (FRET) donor-acceptor assembly was built from quantum dots (QDs) of type Ⅰ CdSe-ZnS (QD491) and type Ⅱ CdS-ZnSe (QD560) QDs. The assembly was further characterized by steady-state and time-resolved photoluminescence (TRPL) measurements at different donor-to-acceptor ratios. Both photoluminescence quenching and reduction of the exciton lifetime of donor QDs provide concrete evidence of FRET between the type Ⅰ QDs and the type Ⅱ QDs. Because the emission wavelengths of CdS-ZnSe and CdSe-ZnS QDs can be spectrally separated by tuning the size of these QDs, the binary QD assembly of type Ⅰ-type Ⅱ QDs could be an attractive approach for the development of efficient light emitters and bio-sensors. |
| Keywords: FRET quantum dots fluorescence time-resolved photoluminescence |
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| 摘要点击次数: 1901 |
| 全文下载次数: 2394 |
| 弓亚琼,詹 寰,张贺楠,卫增岩,苏 伟.CdS-ZnSe 和CdSe-ZnS量子点的合成和F?rster能量转移研究(英文)[J].无机化学学报,2013,29(2):389-396. |
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