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Microbial Biosensors01:17

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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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A potential-controlled electrochromic visual biosensor based on distance readout for zearalenone detection.

Tiantian Xia1, Yanli Zuo1, Liqi Liu1

  • 1School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, PR China.

Biosensors & Bioelectronics
|June 2, 2024
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A novel electrochromic visual biosensor detects zearalenone (ZEN) using a distance readout. The sensor chip measures ZEN concentration by the distance of color change, offering a sensitive detection method.

Keywords:
BiosensorsDistance readoutElectrochromicZearalenone

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Area of Science:

  • Electrochemistry
  • Biosensors
  • Analytical Chemistry

Background:

  • Zearalenone (ZEN) is a mycotoxin with potential health risks.
  • Accurate and sensitive detection of ZEN is crucial for food safety.
  • Existing detection methods may lack visual readout or require complex instrumentation.

Purpose of the Study:

  • To develop a potential-controlled electrochromic visual biosensor for ZEN detection.
  • To implement a distance readout strategy for quantitative ZEN analysis.
  • To achieve sensitive and visual detection of ZEN.

Main Methods:

  • Fabrication of a sensor chip with distinct detection and signal output areas using laser etching.
  • Modification of the detection area with graphene oxide (GO) and ZEN aptamers.
  • Electrodeposition of Prussian blue (PB) onto the signal output channel.
  • Utilizing the potential-induced color change of PB for distance readout.

Main Results:

  • The biosensor demonstrated a visual color change proportional to ZEN concentration.
  • ZEN detection was achieved in the range of 1 ng/mL to 300 ng/mL.
  • A low detection limit of 0.29 ng/mL for ZEN was obtained.

Conclusions:

  • The developed electrochromic visual biosensor offers a sensitive and user-friendly method for ZEN detection.
  • The distance readout strategy provides a simple and effective way to quantify ZEN visually.
  • This biosensor has potential applications in food safety and mycotoxin monitoring.