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Electrochemical Detection of Nucleic Acids Using Three-Dimensional Graphene Screen-Printed Electrodes.

Dar Tafazul Islam1, Shariat Mobasser1, Sruthi Kotaru2,3

  • 1Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, USA.

Methods in Molecular Biology (Clifton, N.J.)
|September 5, 2024
PubMed
Summary

Screen-printed electrodes (SPEs) offer sensitive detection of nucleic acid biomarkers. This electrochemical approach enables quantification of DNA and RNA at attomolar levels without amplification.

Keywords:
BiomarkersElectrochemistryHybridizationScreen-printed electrodesThree dimensional graphene

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Area of Science:

  • Electrochemistry
  • Biosensors
  • Nucleic Acid Detection

Background:

  • Electrochemical methods and electrode miniaturization are vital for detecting nucleic acid biomarkers.
  • Screen-printed electrodes (SPEs) and printed circuit boards facilitate electrode miniaturization.
  • Various electrode materials like glassy carbon, platinum, carbon, and graphene are utilized in SPEs.

Purpose of the Study:

  • To describe the fundamental approach for utilizing SPEs in nucleic acid measurements.
  • To highlight the advantages of electrochemical detection for biomarker quantification.

Main Methods:

  • Utilizing miniaturized electrodes, specifically screen-printed electrodes (SPEs).
  • Employing potentiostats for electrochemical measurements.
  • Exploring various electrode materials and surface modifications.

Main Results:

  • Demonstrated superior limit of detection for biomarkers without the need for amplification.
  • Achieved detection of DNA and RNA concentrations in the nanomolar (nM) to attomolar (aM) range.
  • Successful application of SPEs for detecting cells, proteins, DNA, and RNA.

Conclusions:

  • SPEs provide a powerful and sensitive platform for electrochemical nucleic acid detection.
  • This technique offers high sensitivity and broad applicability for biomarker quantification.
  • The described approach is fundamental for advancing nucleic acid measurement technologies.