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Updated: Jun 29, 2026

Dry Film Photoresist-based Electrochemical Microfluidic Biosensor Platform: Device Fabrication, On-chip Assay Preparation, and System Operation

Dry Film Photoresist-based Electrochemical Microfluidic Biosensor Platform: Device Fabrication, On-chip Assay Preparation, and System Operation

Published on: September 19, 2017

Wired Microfabricated Electrochemical Systems.

Yusei Satoh¹, Hanlin Ding¹, Hao Yang¹

¹Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.

Analytical Chemistry

|September 3, 2021

Summary

This summary is machine-generated.

Metal wires effectively replace liquid junctions in microfluidic electrochemical devices. Iridium wires with iridium oxide minimize interfacial potentials, enabling precise electrochemical measurements and automated control.

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Area of Science:

Electrochemistry
Microfluidics
Materials Science

Background:

Liquid junctions in microfabricated electrochemical devices can be problematic.
Metal wires offer a potential alternative for solution connections.
Canceling interfacial potentials is crucial for metal wire performance.

Purpose of the Study:

To evaluate metal wires as a substitute for liquid junctions in microfluidic electrochemical systems.
To investigate methods for canceling interfacial potentials at metal wire junctions.
To demonstrate the utility of metal wire junctions in various electrochemical techniques.

Main Methods:

Fabrication of microfluidic electrochemical devices using metal wires as junctions.
Comparison of cyclic voltammograms between devices with liquid junctions and metal wires.
Utilizing iridium wires with iridium oxide coatings.
Equalizing pH in working and reference electrode compartments.
Application in voltammetry, amperometry, and potentiometry.

Main Results:

Metal wires demonstrated performance comparable to liquid junctions.
Interfacial potentials at metal wire junctions were effectively canceled, especially with iridium oxide.
The system allowed for reliable integration of common reference electrodes.
Automated electrochemical control of solution transport was achieved.

Conclusions:

Metal wires, particularly iridium oxide-coated iridium, are a viable alternative to liquid junctions in microfluidic electrochemical devices.
Effective cancellation of interfacial potentials is key to their successful application.
This technology facilitates advanced applications like multi-electrode systems and automated microfluidic control.