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Related Experiment Videos

Multiplex biosensor using gold nanorods.

Chenxu Yu1, Joseph Irudayaraj

  • 1Department of Agricultural and Biological Engineering and Bindley Biosciences Center, Purdue University, 225 South University Street, West Lafayette, Indiana 47907, USA.

Analytical Chemistry
|January 16, 2007
PubMed
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Researchers developed gold nanorod molecular probes (GNrMPs) for multiplex biosensing. These probes show distinct plasmon responses, enabling sensitive detection of multiple targets for advanced optical biosensors.

Area of Science:

  • Nanotechnology
  • Biomedical Engineering
  • Spectroscopy

Background:

  • Gold nanorods (GNRs) exhibit unique plasmonic properties tunable by aspect ratio.
  • Surface functionalization is crucial for creating targeted molecular probes.
  • Multiplexed detection enhances biosensing efficiency and information yield.

Purpose of the Study:

  • To fabricate gold nanorod molecular probes (GNrMPs) for multiplexed biosensing.
  • To demonstrate the capability of GNrMPs in detecting multiple targets simultaneously.
  • To explore the potential of GNrMP-based plasmonic sensors for high-sensitivity detection.

Main Methods:

  • Seed-mediated growth of gold nanorods with controlled aspect ratios.
  • Surface activation using alkanethiols for antibody immobilization.

Related Experiment Videos

  • Fabrication of GNrMPs and characterization of their plasmonic response.
  • Demonstration of multiplex sensing using three distinct antibody-target binding events.

    • Main Results:

    • Successfully fabricated GNrMPs with varying aspect ratios.
    • Observed distinct plasmon spectral shifts in response to specific antibody-target binding.
    • Demonstrated multiplex sensing capability for three different IgG targets.
    • Validated the high specificity and sensitivity of the plasmonic sensor.

    Conclusions:

    • GNrMPs are effective tools for multiplexed optical biosensing.
    • Plasmonic sensors based on GNrMPs offer high sensitivity and specificity.
    • This technique holds promise for developing advanced in vivo and in vitro biosensors.
    • Potential for single-particle biosensing and monitoring single-receptor kinetics.