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Related Concept Videos

iChip01:24

iChip

The cultivation of environmental microorganisms has long been hindered by the inability to replicate complex native conditions in vitro. The isolation chip (iChip) addresses this limitation by facilitating the growth of previously uncultivable microorganisms through in situ incubation. Designed for high-throughput microbial cultivation, the iChip comprises hundreds of microchambers, each capable of housing a single microbial cell. These microchambers are loaded with a mixture of molten agar and...

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Related Experiment Video

Updated: May 22, 2026

A Microfluidic Chip for the Versatile Chemical Analysis of Single Cells
15:41

A Microfluidic Chip for the Versatile Chemical Analysis of Single Cells

Published on: October 15, 2013

Development of a microplate reader compatible microfluidic chip for ELISA.

Fenghua Hou1, Qin Zhang, Jianping Yang

  • 1School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou, China.

Biomedical Microdevices
|April 25, 2012
PubMed
Summary
This summary is machine-generated.

A new poly (dimethylsiloxane) microfluidic chip enables enzyme-linked immunoassay (ELISA) with reduced sample and reagent use. This device allows direct quantitative detection, streamlining high-throughput drug screening.

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Last Updated: May 22, 2026

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Electrowetting-based Digital Microfluidics Platform for Automated Enzyme-linked Immunosorbent Assay
08:22

Electrowetting-based Digital Microfluidics Platform for Automated Enzyme-linked Immunosorbent Assay

Published on: February 23, 2020

Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Microfluidics

Background:

  • Enzyme-linked immunoassay (ELISA) is a widely used technique for detecting and quantifying substances.
  • Conventional ELISA methods often require significant sample and reagent volumes, and can be time-consuming.
  • Microfluidic devices offer potential for miniaturization and improved efficiency in immunoassays.

Purpose of the Study:

  • To develop and validate a novel microfluidic device for sandwich ELISA.
  • To demonstrate the device's capability for quantitative detection and its advantages over conventional methods.
  • To explore the potential of this microfluidic platform for high-throughput drug screening.

Main Methods:

  • Fabrication of a poly (dimethylsiloxane) (PDMS) microfluidic chip with two parallel units compatible with microplate readers.
  • Integration of sample/reagent introduction, dilution, distribution, and enzyme immobilization within the chip.
  • Generation of gradient-concentration solutions and simultaneous transport to reaction chambers for enzymatic product formation.
  • Utilizing an alkaline phosphatase (ALP)/4-methylumbelliferyl phosphate (4-MUP)/inhibitor model system to demonstrate enzyme inhibitor assay utility.
  • Optimization of surface treatment, fluid velocities, substrate concentration, and buffer pH.

Main Results:

  • The microfluidic chip successfully performed sandwich ELISA, enabling direct quantitative detection using a microplate reader.
  • The device demonstrated frugal usage of samples and reagents, with reduced operating time compared to conventional ELISA.
  • Optimization studies identified favorable conditions for chip channel surface treatment, fluid dynamics, and reaction parameters.
  • The system proved effective for enzyme inhibitor assays, showcasing its versatility.

Conclusions:

  • The developed microfluidic device offers a highly integrated and efficient platform for ELISA.
  • This technology presents significant advantages in terms of sample/reagent economy and speed, suitable for various applications.
  • The microfluidic ELISA device holds promise for high-throughput drug screening and other analytical applications.