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Preparation and Characterization of Tricolor CdSe-Tagged Microbeads for Bio-Detection

[+] Author Affiliations
Jin Chang, Bingbo Zhang, Dena Li, Weicai Wang, Qi Zhang

Tianjin University, Tianjin, China

Guiping Ma

Beijing Entry-Exit Inspection and Quarantine Bureau, Beijing, China

Paper No. MNC2007-21138, pp. 353-356; 4 pages
  • 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems
  • First International Conference on Integration and Commercialization of Micro and Nanosystems, Parts A and B
  • Sanya, Hainan, China, January 10–13, 2007
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4265-7 | eISBN: 0-7918-3794-7
  • Copyright © 2007 by ASME


Tricolor microbeads for biological assay have been prepared by embedding three quantum dots (cadmium selenide semiconductor nanocrystals) of different size into carboxyl-functionalized polystyrene (PS-COOH) microbeads. These efforts can render CdSe nanocrystals water-solubility, chemical stability and good photostability. The results indicate that QDs-tagged microbeads are highly uniform, reproducible and strong in fluorescence emission. Based on the properties it possesses, QDs-tagged microbead may have great potential for bio-detection.

Copyright © 2007 by ASME



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