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Related Experiment Videos

Porous carbon composite/enzyme glucose microsensor.

C M Li1, C S Cha

  • 1School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798. ecmli@ntu.edu.sg

Frontiers in Bioscience : a Journal and Virtual Library
|September 9, 2004
PubMed
Summary

A novel enzyme glucose microsensor was developed using a glucose oxidase-immobilized porous carbon/Teflon composite microelectrode. This biosensor demonstrates reliable and reproducible glucose determination in serum, showing potential for clinical diagnostics.

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Area of Science:

  • Electrochemistry
  • Biosensors
  • Materials Science

Context:

  • Development of electrochemical biosensors for glucose monitoring is crucial for diabetes management.
  • Existing glucose sensors face challenges in sensitivity, stability, and cost-effectiveness.
  • Need for robust and reliable glucose detection methods in clinical settings.

Purpose:

  • To develop a highly sensitive and stable enzyme glucose microsensor.
  • To fabricate a glucose microsensor utilizing a novel porous carbon/Teflon composite microelectrode.
  • To immobilize glucose oxidase and osmium-based mediators for efficient electron transfer.

Summary:

  • A glucose microsensor was fabricated by immobilizing glucose oxidase onto a porous carbon/Teflon composite microelectrode.

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  • Osmium (Os(bpy)3+2/+3) mediators were incorporated at a high loading density (7.0x10(-8) mole cm(-2)) within the composite.
  • The microsensor exhibited a linear response to glucose (0-15 mM) with Michaelis behavior and demonstrated stability for one month in serum samples.

    • Impact:

    • The developed microsensor offers a promising platform for accurate and reproducible glucose determination.
    • High mediator loading and stable enzyme immobilization contribute to enhanced sensor performance.
    • Potential for application in clinical diagnostics and point-of-care glucose monitoring.