Enhanced Optical Property of Au Coated Polystyrene Beads for Multi-Color Quantum Dots Encoding
Abstract: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
Publication date: March 1, 2009
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