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Related Experiment Video

Updated: Jun 22, 2026

Optical Trapping of Nanoparticles
13:39

Optical Trapping of Nanoparticles

Published on: January 15, 2013

Information coding and retrieving using fluorescent semiconductor nanocrystals for object identification.

Shoude Chang, Ming Zhou, Chander Grover

    Optics Express
    |May 28, 2009
    PubMed
    Summary
    This summary is machine-generated.

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    Semiconductor nanocrystals (quantum dots) offer a novel method for information coding using fluorescence spectral features. This technology enables secure, small-scale labeling and identification, unaffected by rotation or scale changes.

    Area of Science:

    • Materials Science
    • Nanotechnology
    • Spectroscopy

    Background:

    • Traditional barcodes (1-D and 2-D) have limitations in terms of size and visibility.
    • Information coding requires robust methods for small-scale applications and enhanced security.

    Purpose of the Study:

    • To explore the use of semiconductor nanocrystals (quantum dots) for information coding.
    • To develop a method for retrieving information encoded in quantum dot fluorescence spectra.
    • To assess the robustness of this coding method against rotation and scale variations.

    Main Methods:

    • Utilizing the spectral features (wavelength and intensity) of quantum dot fluorescence for information encoding.
    • Employing a de-convolution-based algorithm to resolve overlapping spectral profiles.

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    Genetic Barcoding with Fluorescent Proteins for Multiplexed Applications
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    Published on: April 14, 2015

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    Last Updated: Jun 22, 2026

    Optical Trapping of Nanoparticles
    13:39

    Optical Trapping of Nanoparticles

    Published on: January 15, 2013

    Genetic Barcoding with Fluorescent Proteins for Multiplexed Applications
    13:14

    Genetic Barcoding with Fluorescent Proteins for Multiplexed Applications

    Published on: April 14, 2015

  • Information retrieval using a fluorospectrometer.

    • Main Results:

    • Quantum dot fluorescence spectral features can be effectively used for coding information.
    • The developed algorithm successfully separates overlapped spectral profiles.
    • Information retrieval is independent of object rotation and scale.

    Conclusions:

    • Quantum dot-based spectral coding offers a highly miniaturized and secure information carrier.
    • This technology is suitable for applications such as small product labeling, document security, and object identification.