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- W2438861981 abstract "The DNA-mediated self-assembly of multicolor quantum dot (QD) clusters via a stepwise approach is described. The CdSe/ZnS QDs were synthesized and functionalized with an amphiphilic copolymer, followed by ssDNA conjugation. At each functionalization step, the QDs were purified via gradient ultracentrifugation, which was found to remove excess polymer and QD aggregates, allowing for improved conjugation yields and assembly reactivity. The QDs were then assembled and disassembled in a stepwise manner at a ssDNA functionalized magnetic colloid, which provided a convenient way to remove unreacted QDs and ssDNA impurities. After assembly/disassembly, the clusters’ optical characteristics were studied by fluorescence spectroscopy and the assembly morphology and stoichiometry was imaged via electron microscopy. The results indicate that a significant amount of QD-to-QD energy transfer occurred in the clusters, which was studied as a function of increasing acceptor-to-donor ratios, resulting in increased QD acceptor emission intensities compared to controls." @default.
- W2438861981 created "2016-06-24" @default.
- W2438861981 creator A5016175113 @default.
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- W2438861981 date "2015-07-01" @default.
- W2438861981 modified "2023-10-16" @default.
- W2438861981 title "Stepwise Assembly and Characterization of DNA Linked Two-Color Quantum Dot Clusters" @default.
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- W2438861981 doi "https://doi.org/10.1021/acs.langmuir.5b01130" @default.
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