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Optical immunosensors

S Y Rabbany1, B L Donner, F S Ligler

  • 1Bioengineering Program, Hofstra University, Hempstead, NY 11550, USA.

Critical Reviews in Biomedical Engineering
|January 1, 1994
PubMed
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Optical immunosensors, utilizing antibodies for detection, offer versatile applications in medicine and environmental monitoring. This review covers antibody-antigen interactions, immobilization, and various optical sensing platforms, exploring their future potential.

Area of Science:

  • Biochemistry and Biotechnology
  • Sensor Technology
  • Analytical Chemistry

Background:

  • Immunosensors, employing antibodies as recognition elements, are gaining significant attention due to their broad applicability.
  • These systems are valuable in medicine, process control, and environmental monitoring, demanding high speed and accuracy.
  • The theoretical limit for detectable chemical and biological moieties is virtually nonexistent.

Purpose of the Study:

  • To provide a critical review of optical immunosensors, focusing on biological and transduction aspects.
  • To discuss antibody-antigen interactions, kinetics at the solid-liquid interface, and reagent immobilization.
  • To present an overview of various immunosensing formats, their mechanisms, advantages, and limitations.

Main Methods:

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  • Review of fundamental principles of antibody-antigen interactions.
  • Characterization of factors influencing kinetics at the solid-liquid interface.
  • Discussion of reagent immobilization strategies for immunosensor design.
  • Comprehensive analysis of optical immunosensing formats: fiber-optic, planar waveguide, surface plasmon resonance (SPR), and continuous-flow.

Main Results:

  • Detailed examination of the biological recognition mechanisms and optical transduction principles.
  • Evaluation of the advantages and disadvantages of different optical immunosensor configurations.
  • Exploration of challenges and opportunities in immunosensor development and application.

Conclusions:

  • Optical immunosensors represent a powerful and adaptable technology with vast potential across multiple scientific and industrial fields.
  • Integration with advanced technologies like fluorescence lifetime sensing and fluorescent polarization could further enhance capabilities.
  • The future market position of immunosensors depends on continued innovation and addressing current limitations.