Graphene Wrapping of Electrospun Nanofibers for Enhanced Electrochemical Sensing

Andreas Tsiamis, Francisco Javier Diaz Sanchez, Niklas Hartikainen, Michael Chung, Srinjoy Mitra, Ying Chin Lim, Huey Ling Tan, Norbert Radacsi

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a scalable method of developing ultrasensitive electrochemical biosensors. This is achieved by maximizing sensor conductivity through graphene wrapping of carbonized electrospun nanofibers. The effectiveness of the graphene wrap was determined visually by scanning electron microscopy and chemically by Fourier transform infrared spectroscopy, Raman spectroscopy, and X-ray diffraction. The sensing performance of different electrode samples was electrochemically characterized using cyclic voltammetry and electrochemical impedance spectroscopy, with the graphene-wrapped carbonized nanofiber electrode showing significantly improved performance. The graphene-wrapped carbonized nanofibers exhibited a relative conductivity of ∼14 times and an electroactive surface area of ∼2 times greater compared to the bare screen-printed carbon electrode despite experiencing inhibitive effects from the carbon glue used to bind the samples to the electrode. The results indicate potential for a highly conductive, inert sensing platform.
Original languageEnglish
Pages (from-to)10568–10577
JournalACS Omega
Volume6
Issue number16
Early online date13 Apr 2021
DOIs
Publication statusPublished - 27 Apr 2021

Keywords

  • GRAPHENE
  • Electrospinning

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