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Mesoporous chitosan based conformable and resorbable biostrip for dopamine detection.

Md Abdul Kafi1, Ambarish Paul2, Anastasios Vilouras2

  • 1Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh; BEST Group, James Watt School of Engineering, University of Glasgow, G128QQ, UK.

Biosensors & Bioelectronics
|October 20, 2019
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Summary

This study introduces a novel resorbable biostrip for detecting dopamine (DA) using a chitosan-graphene composite. The biostrip achieves highly sensitive electrochemical detection of DA at picomolar levels, aiding early neurodegenerative disease diagnosis.

Keywords:
Bioresorbable electronicsBiostripChitosanDopamineGraphene oxide

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Area of Science:

  • Biomaterials Science
  • Electrochemistry
  • Neuroscience

Background:

  • Dopamine (DA) plays a crucial role in neurological functions.
  • Early diagnosis of neurodegenerative diseases relies on accurate DA level monitoring.
  • Existing DA detection methods often lack sensitivity or require complex procedures.

Purpose of the Study:

  • To develop a resorbable biostrip for sensitive, label-free electrochemical detection of dopamine (DA).
  • To investigate the impact of mesoporosity in chitosan-graphene oxide composites on DA detection.
  • To establish the potential of this biostrip for early diagnosis of neurodegenerative diseases.

Main Methods:

  • Fabrication of a resorbable biostrip using mesoporous-chitosan-graphene oxide (m-Chit-GO) composite and graphene interconnects.
  • Electrochemical characterization using cyclic voltammetry with a three-electrode setup.
  • Comparison of DA detection performance between mesoporous and bulk m-Chit-GO electrodes.

Main Results:

  • The m-Chit-GO composite exhibited an average pore size of 1μm.
  • Mesoporous m-Chit-GO demonstrated significantly enhanced DA detection sensitivity (10 pM) compared to bulk material (100 nM).
  • The developed biostrip achieved a limit of detection of 10 pM for DA.

Conclusions:

  • The developed chitosan-based resorbable biostrip enables highly sensitive, label-free electrochemical detection of dopamine.
  • Mesoporosity in the chitosan-graphene oxide composite is key to enhancing DA detection performance.
  • This biostrip shows significant promise for the early diagnosis of neurodegenerative diseases through accurate DA level monitoring.