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Luminescence enhancement by surface plasmon assisted Förster resonance energy transfer in quantum dots and light emitting polymer hybrids with Au nanoparticles

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Title
Luminescence enhancement by surface plasmon assisted Förster resonance energy transfer in quantum dots and light emitting polymer hybrids with Au nanoparticles
Author(s)
Lee Y.-B.; Lee S.H.; Park S.-Y.; Park C.-J.; Lee K.-S.; Jeongyong Kim; Joo J.
Publication Date
2014-01
Journal
SYNTHETIC METALS, v.187, no.1, pp.130 - 135
Publisher
ELSEVIER SCIENCE SA
Abstract
Hybrid nanowires (NWs) of light-emitting poly(3-hexylthiophene) (P3HT) blended with gold nanoparticles (Au-NPs) were fabricated by a wetting method. The functionalized CdSe/ZnS quantum dots (QDs) were attached to the surfaces of P3HT/Au-NPs NWs. The nanoscale photoluminescence (PL) characteristics of the P3HT, P3HT/Au-NPs, and QDs/P3HT/Au-NPs single NWs were investigated using a high resolution laser confocal microscope (LCM). For a P3HT/Au-NPs single NW, the LCM PL intensity of the P3HT NW decreased due to the luminescence quenching effect by the blending with Au-NPs. However, the LCM PL intensity of the P3HT/Au-NPs NW drastically increased when the QDs were attached to the surface of the NW. The PL enhancement of the P3HT NW part in the hybrid QDs/P3HT/Au-NPs single NW originated from the Förster resonance energy transfer (FRET) effect between the QDs and the P3HT NW, which was assisted by the surface plasmon (SP) coupling of Au-NPs with the QDs. Based on the analysis of time-resolved PL spectra, the exciton lifetimes of the QDs for the QDs/P3HT/Au-NPs NW were found to decrease considerably in comparison with those of the QDs/P3HT NWs without Au-NPs. We also found that the energy transfer rate of the QDs/P3HT NW increased from 0.76 to 0.93 with the Au-NPs. These observations support the notion of SP assisted FRET effect in hybrid nanosystems. © 2013 Elsevier B.V. All rights reserved.
URI
https://pr.ibs.re.kr/handle/8788114/1170
ISSN
0379-6779
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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