Effect of microchannel dimensions in electrochemical impedance spectroscopy using gold microelectrode

Ghorbanpoor, Hamed and Corrigan, Damion and Guzel, Fatma Doğan (2022) Effect of microchannel dimensions in electrochemical impedance spectroscopy using gold microelectrode. Sakarya University Journal of Science, 26 (1). pp. 120-127. ISSN 2147-835X (https://doi.org/10.16984/saufenbilder.982707)

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Abstract

Microfluidic chip systems have been an area of interest for lab-on-a-chip and organ-on-a-chip studies in recent years. These chips have many advantages such as high efficiency, low sample consumption, fast analysis, durability and low cost. Today, electrochemical sensors are frequently applied in microfluidic chips because of their potential for label-free detection and low-cost production. A commonly employed electrochemical technique is electrochemical impedance spectroscopy (EIS), which captures changes in phase and amplitude as signal passes through the system under test. In the utilization of microelectrodes within microfluidic channels, noise becomes a problem in EIS measurements. In this study, EIS measurements were performed using microfluidic chips with various dimensions of width while the properties and dimensions of the microelectrodes were kept constant. It was found that the results of cyclic voltammetry (CV) cleaning and EIS experiments deteriorated when smaller than 1 mm wide-microchannels were integrated onto 100 µm wide microelectrodes. These finding sets the basics for on-chip electrochemistry experiments using microfluidic integrated microelectrodes and therefore is fundamentally important in future on-chip EIS measurements.

ORCID iDs

Corrigan, Damion ORCID: https://orcid.org/0000-0002-4647-7483

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  Item type:	Article
  ID code:	79724
  Dates:	Date Event 28 February 2022 Published 28 February 2022 Published Online 20 December 2021 Accepted
  Subjects:	Science > Chemistry
  Department:	Faculty of Science > Pure and Applied Chemistry
  Depositing user:	Pure Administrator
  Date deposited:	24 Feb 2022 15:16
  Last modified:	11 Nov 2024 13:21
  URI:	https://strathprints.strath.ac.uk/id/eprint/79724