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Related Concept Videos

Microbial Biosensors01:17

Microbial Biosensors

Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...

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Preparation of Functional Silica Using a Bioinspired Method
08:04

Preparation of Functional Silica Using a Bioinspired Method

Published on: August 1, 2018

Novel microbiosensors prepared utilizing biomimetic silicification method.

Faming Tian1, Wenjue Wu, Michael Broderick

  • 1Biosensor Group, Department of Biological Sciences, University of Warwick, Coventry CV4 7AL, UK.

Biosensors & Bioelectronics
|May 8, 2010
PubMed
Summary
This summary is machine-generated.

We developed a simple biomimetic silicification method using poly-L-lysine to create enzyme-based microbiosensors for detecting various analytes. This efficient technique allows for robust enzyme entrapment and demonstrates good performance for adenosine detection.

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Area of Science:

  • Biomaterials Science
  • Biosensor Technology
  • Electrochemistry

Background:

  • Enzyme entrapment is crucial for microbiosensor fabrication.
  • Existing methods can be harsh or inefficient.
  • A mild, efficient method is needed for robust enzyme immobilization.

Purpose of the Study:

  • To develop a simple, rapid, and mild biomimetic silicification method for microbiosensor fabrication.
  • To immobilize enzymes for detecting various analytes.
  • To fabricate and characterize adenosine microbiosensors.

Main Methods:

  • Functionalization of Pt microelectrodes with poly(pyrrole-1-propanoic acid).
  • Covalent immobilization of poly-L-lysine using EDC/NHSS cross-linkers.
  • Biomimetic silicification catalyzed by poly-L-lysine for enzyme entrapment.
  • Fabrication of adenosine, l-glutamate, and lactate microbiosensors.

Main Results:

  • Simultaneous entrapment of adenosine deaminase (AD), nucleoside phosphorylase (NP), and xanthine oxidase (XO) enzymes.
  • Adenosine biosensors showed high sensitivity (153.0+/-2.4 microA mM(-1)cm(-2)), low detection limit (40 nM), and fast response time (25+/-2s).
  • Effective selectivity against interfering substances using a poly(diaminobenzene) screening barrier.

Conclusions:

  • The biomimetic silicification method is a mild and efficient approach for microbiosensor fabrication.
  • The method is adaptable for various enzymes and analytes, including l-glutamate and lactate.
  • This technique offers a promising platform for developing advanced biosensing devices.