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Impedance spectroscopy for monosaccharides detection using responsive hydrogel modified paper-based electrodes.

C M Daikuzono1, C Delaney2, H Tesfay2

  • 1Insight Centre for Data Analytics, National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Ireland. larisa.florea@dcu.ie and Instituto de Física de São Carlos, Universidade de São Paulo, Brazil.

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|March 17, 2017
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Summary
This summary is machine-generated.

This study introduces a novel paper-based sensor using electrical impedance spectroscopy for detecting glucose and fructose. The sensor shows promise for non-invasive monitoring of sugar levels in human sweat.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Biosensing

Background:

  • Monosaccharide detection is crucial for health monitoring.
  • Existing methods for sugar detection can be complex or invasive.
  • Paper-based sensors offer a low-cost, disposable alternative.

Purpose of the Study:

  • To develop and characterize a novel paper-based sensor for monosaccharide detection.
  • To investigate the sensor's response to glucose and fructose using electrical impedance spectroscopy.
  • To evaluate the sensor's potential for non-invasive sugar monitoring in sweat.

Main Methods:

  • Fabrication of carbon interdigitated electrodes on paper via screen printing.
  • Modification of electrode surfaces with a hydrogel containing 3-(Acrylamido)phenylboronic acid (PBA).
  • Measurement of electrical impedance and capacitance variations with varying glucose and fructose concentrations (0-5 mM).

Main Results:

  • Hydrogel swelling in response to glucose and fructose was observed.
  • Impedance decreased with increasing sugar concentration, indicating quantitative detection.
  • Capacitance curves differed for glucose and fructose, allowing for discrimination.
  • Sensor demonstrated suitability for detecting glucose levels in human sweat.

Conclusions:

  • The developed paper-based sensor effectively detects monosaccharides using electrical impedance.
  • The sensor's response is attributed to hydrogel swelling induced by sugar binding.
  • The technology holds potential for wearable, non-invasive sweat monitoring devices.