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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...

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Related Experiment Video

Updated: May 15, 2026

Computer Numerical Control Micromilling of a Microfluidic Acrylic Device with a Staggered Restriction for Magnetic Nanoparticle-Based Immunoassays
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An automated and portable magnetically-controlled microfluidic chip platform with dual detection modes for sensitive

Peng Zhang1, Chenqi Zhang2, Min Jia3

  • 1College of Electrical Engineering, North China University of Science and Technology, Tangshan 063210, China; Xiangfu Laboratory, Jiaxing Key Laboratory of Bio-semiconductor, Jiashan 314102, China.

Analytica Chimica Acta
|May 13, 2026
PubMed
Summary

A new portable microfluidic device automates immunoassays for early cancer detection. This technology significantly improves sensitivity and reduces assay time for hepatocellular carcinoma biomarkers, enhancing diagnostic accessibility.

Keywords:
Biomarkers detectionMicrofluidic chipOn-chip immunoassaysPoint-of-care testingPortable device

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Oncology

Background:

  • Early diagnosis of hepatocellular carcinoma (HCC) relies on sensitive immunoassays.
  • Conventional ELISA methods face limitations in sensitivity, speed, and complexity, hindering early detection of low-abundance biomarkers.
  • Microfluidic technology offers advantages in reagent efficiency, reaction control, and portability for on-site screening.

Purpose of the Study:

  • To develop a portable, automated microfluidic device for sensitive and rapid immunoassay processing.
  • To overcome the limitations of conventional diagnostic methods for early hepatocellular carcinoma detection.
  • To enable on-site screening with enhanced accessibility, particularly in resource-limited settings.

Main Methods:

  • Development of a portable microfluidic chip integrated with an algorithm-driven stepper motor and magnetic bead manipulation.
  • Automated bead capture, transport, and multi-step immunoreaction sequences without manual intervention.
  • Utilized alpha-fetoprotein (AFP) as a model biomarker for performance evaluation in colorimetric and chemiluminescent modes.

Main Results:

  • The device achieved a detection limit of 119.43 ng/mL in colorimetric mode and 3.66 ng/mL in chemiluminescent mode for AFP.
  • Demonstrated feasibility of automated, multi-step immunoassay processing in a compact point-of-care format.
  • Significantly reduced assay duration and procedural complexity compared to conventional methods.

Conclusions:

  • The developed microfluidic platform enables rapid, sensitive, and automated biomarker screening for early disease diagnosis.
  • This technology addresses key deficiencies in hepatocellular carcinoma screening, improving patient prognosis and survival.
  • Offers a promising solution for democratizing advanced diagnostic capabilities in resource-limited environments.