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Updated: Apr 3, 2026

Computer Numerical Control Micromilling of a Microfluidic Acrylic Device with a Staggered Restriction for Magnetic Nanoparticle-Based Immunoassays

Computer Numerical Control Micromilling of a Microfluidic Acrylic Device with a Staggered Restriction for Magnetic Nanoparticle-Based Immunoassays

Published on: June 23, 2022

Automated microfluidic processing platform for multiplexed magnetic bead immunoassays.

Lawrence A Sasso¹, Ian H Johnston¹, Mingde Zheng¹

¹BioMEMS Laboratory, Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ 08854, USA.

Microfluidics and Nanofluidics

|September 15, 2015

Summary

This summary is machine-generated.

This study introduces a microfluidic platform that fully automates magnetic bead immunoassays, like Luminex xMAP technology. The system enables sensitive, high-throughput detection of biomarkers with minimal user intervention.

Keywords:

Biosensor Fluorocytometry Immunoassay Magnetic Microfluidic

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Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

Area of Science:

Biomedical Engineering
Analytical Chemistry
Microfluidics

Background:

Multiplexed magnetic bead immunoassays, such as Luminex xMAP technology, are crucial for sensitive biomarker detection.
Automation of these assays is needed to improve efficiency and reduce hands-on time.

Purpose of the Study:

To develop a microfluidic platform for fully automated incubation steps in multiplexed magnetic bead immunoassays.
To enable high-sensitivity detection with extended incubation times and continuous flow operation.

Main Methods:

A microfluidic platform utilizing magnetic actuation for microbead transfer between laminar flow streams.
Automated serial incubation and washing steps within the device.
Empirical characterization of binding kinetics to optimize incubation times.

Main Results:

Successful automation of all incubation steps for a three-stage, multiplexed immunoassay.
Demonstrated high sensitivity (1 pg/ml to 100 ng/ml) with optimized incubation times (commonly 5 min per stage).
Concurrent detection of IL-6 and TNF-α using a Luminex xMAP duplex assay with a detection range of 10 pg/ml to 1 ng/ml.

Conclusions:

The developed microfluidic platform enables rapid automation of magnetic microbead assays.
This technology has the potential for continuous concentration monitoring and high-throughput biomarker analysis.