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Related Experiment Video

Updated: Jan 20, 2026

Picoinjection of Microfluidic Drops Without Metal Electrodes

Picoinjection of Microfluidic Drops Without Metal Electrodes

Published on: April 18, 2014

Ring Electrode Geometry for Microfluidic Electrochemistry.

Bradley Ledden¹, Joe Bruton¹

¹SFC Fluidics, 534 West Research Center Blvd., Ste. 260, Fayetteville, AR USA 72701.

Sensors and Actuators. B, Chemical

|August 16, 2019

Summary

This summary is machine-generated.

A novel ring electrode sensor was developed for microfluidic ELISA assays, offering robust electrochemical detection in flowing solutions. This sensor design minimizes bubble trapping, enhancing reliability for microfluidic applications.

Keywords:

LTCC Low Temperature Co-fired Ceramic flow ring electrode tubular electrode

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Area of Science:

Electrochemistry
Microfluidics
Sensor Technology

Background:

Electrochemical sensing is crucial for microfluidic assays.
Integrating sensors into flow environments presents challenges.
Existing sensors may suffer from bubble trapping in flowing solutions.

Purpose of the Study:

To develop a novel ring electrode sensor for downstream electrochemical detection in microfluidic ELISA assays.
To design a sensor that seamlessly integrates into microfluidic flow systems.
To evaluate sensor performance in both static and dynamic fluid conditions.

Main Methods:

Fabrication of ring electrode sensors using noble metal inks on Low Temperature Co-fired Ceramic (LTCC).
Modeling of two distinct sensor geometries to optimize design.
Experimental testing of the best-performing sensor design in static and flowing solutions.

Main Results:

The fabricated ring electrode sensor demonstrated robust performance at the mesoscale.
Sensor behavior transitioned between macroelectrode and microelectrode characteristics based on fluid flow rate.
The sensor exhibited a low propensity for bubble trapping, a significant advantage in flowing systems.

Conclusions:

The developed ring electrode sensor is suitable for electrochemical detection in microfluidic systems.
Its ability to adapt to flow rates and resist bubble trapping makes it ideal for continuous flow applications.
This sensor technology offers a promising solution for enhanced microfluidic assay detection.