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Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...
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Hybrid Printing for the Fabrication of Smart Sensors
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Fabrication of a Flexible Amperometric Glucose Sensor Using Additive Processes.

Xiaosong Du1, Christopher J Durgan1, David J Matthews2

  • 1School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, Oregon 97331, USA.

ECS Journal of Solid State Science and Technology : JSS
|December 4, 2015
PubMed
Summary

Researchers developed a novel amperometric glucose sensor using additive manufacturing. This printable glucose sensor demonstrates high accuracy and can be integrated into medical devices, potentially reducing costs.

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Analytical Chemistry

Background:

  • Amperometric glucose sensors are crucial for diabetes management.
  • Current fabrication methods can be costly and complex.
  • Need for flexible and cost-effective glucose sensing technologies.

Purpose of the Study:

  • To fabricate a novel amperometric glucose sensor using additive manufacturing techniques.
  • To evaluate the performance and applicability of the fabricated sensor.
  • To explore the potential for cost reduction and integration into medical devices.

Main Methods:

  • Fabrication of a glucose sensor on a gold-coated polyimide substrate.
  • Utilized micro-contact printing, electrochemical plating, chloridization, electrohydrodynamic jet (e-jet) printing, and spin coating.
  • Optimized permselective layer thickness for enhanced selectivity and sensitivity.

Main Results:

  • Electrohydrodynamic jet (e-jet) printing successfully deposited active glucose oxidase inks with precise patterning.
  • Achieved a linear response for glucose concentrations up to 32 mM.
  • Demonstrated no response to acetaminophen, indicating high selectivity.
  • The sensor's thin polyimide substrate allowed for integration with a high radius of curvature (~250 μm).

Conclusions:

  • Additive manufacturing, specifically e-jet printing, offers a viable method for fabricating active amperometric glucose sensors.
  • The developed sensor exhibits excellent sensitivity, selectivity, and flexibility.
  • This approach holds promise for cost-effective production and integration into wearable or implantable devices.