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Electrochemical Strips Modified with Zeolites Embedding Silver Clusters for Versatile (Bio)Systems.

Cecilia García-Guzmán1,2, Ada Raucci1, Eduardo Coutino-Gonzalez3

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Disposable biosensors utilizing zeolites with silver clusters offer enhanced analyte detection for environmental and clinical applications. This innovation enables simple, low-cost portable sensors for point-of-care diagnostics.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Nanotechnology

Background:

  • Disposable biosensors are vital for portable analytical platforms due to their portability and rapid response times.
  • Developing advanced electroactive materials is key to improving electrode-analyte interactions and electron transfer in electrochemical sensors.

Purpose of the Study:

  • To develop a novel electroactive material using zeolites embedding silver clusters for disposable electrochemical sensors.
  • To demonstrate the versatility of this composite material for detecting both inorganic ions and biomolecules.

Main Methods:

  • Zeolites embedding silver clusters were synthesized and characterized as an electroactive material.
  • Disposable electrochemical strips (plastic/paper) were modified with the composite material.
  • The composite's performance was evaluated for chloride ion detection via redox properties and glucose sensing via electrocatalysis with glucose oxidase.

Main Results:

  • The zeolites-silver cluster composite effectively immobilized analytes and facilitated electron transfer.
  • Chloride ion detection was achieved, suitable for environmental monitoring.
  • Glucose sensing demonstrated the material's electrocatalytic activity and versatility for different analytes.

Conclusions:

  • Zeolites embedding silver clusters represent a simple, low-cost modification for disposable electrochemical sensors.
  • This approach enhances electrode-analyte interaction and electron exchange, crucial for portable and point-of-care devices.
  • The composite material shows promise for developing versatile sensors for diverse clinical and environmental applications.