Issue 37, 2023

Graphene oxide fiber microelectrodes with controlled sheet alignment for sensitive neurotransmitter detection

Abstract

Here, we synthesized and characterized graphene oxide (GO) fiber microelectrodes with controllable nanosheet orientation to study the extent to which sheet alignment and orientation impacts electrochemical detection of neurochemicals. The alignment of the GO nanosheets was characterized by scanning electron microscopy, Raman spectroscopy, and cyclic voltammetry. The electrochemical performance of GO microelectrodes and its suitability for subsecond detection of neurotransmitters was further evaluated by fast-scan cyclic voltammetry (FSCV). We have shown that the GO sheet alignment has a considerable effect on the electron transfer kinetics, frequency independent behavior, and detection suitability for specific neurotransmitters. Therefore, this fine-tuning aspect of the electrode surface for specific electrochemical detection should be taken into consideration for any future utilization of GO-based biological sensors.

Graphical abstract: Graphene oxide fiber microelectrodes with controlled sheet alignment for sensitive neurotransmitter detection

Supplementary files

Article information

Article type
Paper
Submitted
16 Jun 2023
Accepted
31 Aug 2023
First published
01 Sep 2023

Nanoscale, 2023,15, 15249-15258

Author version available

Graphene oxide fiber microelectrodes with controlled sheet alignment for sensitive neurotransmitter detection

R. Jarosova, B. J. Ostertag and A. E. Ross, Nanoscale, 2023, 15, 15249 DOI: 10.1039/D3NR02879H

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