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Enhanced Optical Property of Au Coated Polystyrene Beads for Multi-Color Quantum Dots Encoding

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A novel quantum dots (QDs) fluorescent encoding method was demonstrated in this paper by using Au coated polystyrene (Au@PS) beads. In the experiments, Au nanoparticles were deposited onto the polystyrene bead to form a stable Au coating through Layer-by-Layer assembly, and the surface morphology of the Au@PS beads was studied by Scanning Electronic Microscope (SEM). Furthermore, the QDs encoding abilities, including the loading of QDs, the anti-photo bleaching ability and the multi-color encoding feasibility were studied using Au@PS beads. The QDs leakage from doped QDs encoded Au@PS was also studied. This study shows that Au particles improve the QDs encoding performance and the QD-encoded Au@PS beads are the ideal material for the optical encoding.


Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2009.396

Publication date: March 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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