Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 30, Issue 14, Pages 1274-1278Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200900254
Keywords
end group; fluorescence resonance energy transfer (FRET); nanoparticles; polymer; reversible addition fragmentation chain transfer (RAFT)
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Funding
- International Research and Training Group [1404]
- National Research Foundation of Korea [과06A1501] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The synthesis of poly(methyl methacrylate) (PMMA) exhibiting one fluorescent dye (Texas Red) and one methyl disulfide end group is described. It is shown that the latter end group enabled the exchange of both oleic amine on gold nanoparticles (AuNP) and of oleic acid on CdSe/ZnS quantum dots (QD), allowing for a phase transfer of both types of nanoparticles (NP) from hexane into dimethylformamide due to the solubility provided by the PMMA chains. For AuNP, a fluorescence quenching of the dye was found due to fluorescence resonance energy transfer (FRET) from the dye to the AuNP, while QDs caused a fluorescence enhancement by FRET from the OD to the attached dyes. Due to the hetero-telechelic geometry of the polymer, the separation between NP and dye is governed by the end-to-end distance of the polymer.
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