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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 1 — Jan. 12, 2004
  • pp: 143–148

Information coding and retrieving using fluorescent semiconductor nanocrystals for object identification

Shoude Chang, Ming Zhou, and Chander P. Grover  »View Author Affiliations

Optics Express, Vol. 12, Issue 1, pp. 143-148 (2004)

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The spectral features, i.e., wavelength and intensity, of fluorescence generated from semiconductor nanocrystals (quantum dots) can be used for coding information. Unlike the 1-D and 2-D barcodes, the information carrier is applied to a very small area and hardly visible. The information retrieving by a fluorospectrometer is not subjected to the changes of rotation and scale. A de-convolution-based algorithm is used to separate the overlapped spectral profiles. This technology can be applied to small products labeling, document security and object identification.

© 2004 Optical Society of America

OCIS Codes
(040.0040) Detectors : Detectors
(070.4790) Fourier optics and signal processing : Spectrum analysis
(120.4630) Instrumentation, measurement, and metrology : Optical inspection

ToC Category:
Research Papers

Original Manuscript: December 5, 2003
Revised Manuscript: December 19, 2003
Published: January 12, 2004

Shoude Chang, Ming Zhou, and Chander Grover, "Information coding and retrieving using fluorescent semiconductor nanocrystals for object identification," Opt. Express 12, 143-148 (2004)

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  1. A. P. Alivisatos, �??Perspectives on the physical chemistry of semiconductor nanocrystals,�?? J. Phys. Chem. 100, 13226-13239 (1996). [CrossRef]
  2. M. Han, X. Gao, J. Z. Su, S. Nie, �??Quantum-dot-tagged microbeads for multiplexed optical coding of biomolecules,�?? Nature Biotechnol. 19, 631-635 (2001). [CrossRef]
  3. W. C. W. Chan, D. J. Maxwell, X. Gao, R. E. Bailey, M. Han, S. Nie, �??Luminescent quantum dots for multiplexed biological detection and imaging,�?? Current Opinion in Biotechnol. 13, 40-46 (2002). [CrossRef]
  4. X. Gao, W. C. W. Chan, S. Nie, �??Quantum-dot nanocrystals for ultrasensitive biological labeling and multicolor optical encoding,�?? J. Biomed. Opt. 74, 532-537 (2002). [CrossRef]
  5. M. A. Hines, P. Guyot-Sionnest, �??Synthesis and characterization of strongly luminescing ZnS-capped CdSe nanocrystals,�?? J. Phys. Chem. 100, 468-471 (1996). [CrossRef]
  6. B. O. Dabbousi, J. Rodriguez-Viejo, F. V. Mikulec, J. R. Heine, H. Mattoussi, R. Ober, K. F. Jensen, M. G. Bawendi, �??(CdSe)ZnS core-shell quantum dots: synthesis and characterization of a size series of highly luminescent nanocrystallites,�?? J. Phys. Chem. B, 101, 9463-9475 (1997). [CrossRef]
  7. <a href="http://www.evidenttech.com">http://www.evidenttech.com</a>
  8. J. Lee, V. C. Sundar, J. R. Heine, M. G. Bawendi, K. F. Jensen, �??Full color emission from II-VI semiconductor quantum dot-polymer composites,�?? Adv. Mater. 12, 1102-1105 (2000). [CrossRef]
  9. <a href="http://www.oceanoptics.com">http://www.oceanoptics.com</a>
  10. C. C. Chan, W. Jin, M. S. Demokan, �??Enhancement of measurement accuracy in fiber Bragg grating sensors by using digital signal processing,�?? Opt. & Laser Technol. 31, 299-307 (1999). [CrossRef]
  11. S. Chang and C. P. Grover, �??Centroid detection based on optical correlation," Opt. Eng. 41, 2479-2486 (2002). [CrossRef]

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