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MDPI, Sensors, 8(15), p. 18102-18113, 2015

DOI: 10.3390/s150818102

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Surface and Electrical Characterization of Ag/AgCl Pseudo-Reference Electrodes Manufactured with Commercially Available PCB Technologies

Journal article published in 2015 by Despina Moschou ORCID, Tatiana Trantidou, Anna Regoutz ORCID, Daniela Carta, Hywel Morgan ORCID, Themistoklis Prodromakis
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Lab-on-Chip is a technology that could potentially revolutionize medical Point-of-Care diagnostics. Considerable research effort is focused towards innovating production technologies that will make commercial upscaling financially viable. Printed circuit board manufacturing techniques offer several prospects in this field. Here, we present a novel approach to manufacturing Printed Circuit Board (PCB)-based Ag/AgCl reference electrodes, an essential component of biosensors. Our prototypes were characterized both structurally and electrically. Scanning Electron Microscopy (SEM) and X-Ray Photoelectron Spectroscopy (XPS) were employed to evaluate the electrode surface characteristics. Electrical characterization was performed to determine stability and pH dependency. Finally, we demonstrate utilization along with PCB pH sensors, as a step towards a fully integrated PCB platform, comparing performance with discrete commercial reference electrodes.