Issue 11, 2013
From the journal:

Journal of Materials Chemistry C

Nanoscale luminescence characteristics of CdSe/ZnS quantum dots hybridized with organic and metal nanowires: energy transfer effects†

Yong-baek Lee,a   Sungyeoun Park,b   Sunmi Lee,a   Jeongyong Kim,c   Kwang-Sup Lee*b  and  Jinsoo Joo*a  

* Corresponding authors

a Department of Physics, Korea University, Seoul 136-713, Republic of Korea
E-mail: jjoo@korea.ac.kr
Fax: +82-2-927-3292
Tel: +82-2-3290-3103

b Department of Advanced Materials, Hannam University, Daejeon 305-811, Republic of Korea
E-mail: kslee@hnu.kr
Fax: +82-42-629-8854
Tel: +82-42-629-8857

c Department of Physics, University of Incheon, Incheon 406-772, Republic of Korea

Abstract

Hybrid nanosystems comprising functionalized CdSe/ZnS core–shell quantum dots (QDs) on the surface of light-emitting poly(3-hexylthiophene) (P3HT), metallic copper (Cu), and insulating polystyrene (PS) nanowires (NWs) are fabricated. Using high-resolution scanning transmission electron microscopy, we observe that the QDs are attached to the surface of the NWs. The nanoscale photoluminescence (PL) characteristics of the hybrid QD/P3HT, QD/Cu, and QD/PS single NWs are investigated using laser confocal microscopy (LCM) with high spatial resolution. For the hybrid QD/P3HT single NW, the LCM PL intensity from the P3HT NW increases considerably, while that of the QDs decreases due to Förster resonance energy transfer. Hybridization affects the nanoscale PL characteristics of both the P3HT NW and the QDs. The LCM PL intensity of the hybrid QD/Cu NW is three times higher than that of the QD/PS NW, because of surface plasmon resonance coupling energy transfer between the QDs and the Cu NW. Time-resolved PL spectra reveal that the exciton lifetimes of the QDs drastically decrease after the hybridization with P3HT or Cu NWs, due to energy transfer effects. The nanoscale PL efficiency of the QDs can be controlled by hybridization with NWs having distinct properties.

Graphical abstract: Nanoscale luminescence characteristics of CdSe/ZnS quantum dots hybridized with organic and metal nanowires: energy transfer effects

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Article information

DOI
https://doi.org/10.1039/C3TC00013C
Article type
Paper
Submitted
09 Oct 2012
Accepted
23 Jan 2013
First published
24 Jan 2013

J. Mater. Chem. C, 2013,1, 2145-2151

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Nanoscale luminescence characteristics of CdSe/ZnS quantum dots hybridized with organic and metal nanowires: energy transfer effects

Y. Lee, S. Park, S. Lee, J. Kim, K. Lee and J. Joo, J. Mater. Chem. C, 2013, 1, 2145 DOI: 10.1039/C3TC00013C

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