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Related Experiment Video

Updated: Jun 13, 2026

Scalable Fabrication of Stretchable, Dual Channel, Microfluidic Organ Chips
14:44

Scalable Fabrication of Stretchable, Dual Channel, Microfluidic Organ Chips

Published on: October 20, 2018

A simple method for fabricating multi-layer PDMS structures for 3D microfluidic chips.

Mengying Zhang1, Jinbo Wu, Limu Wang

  • 1Nano Science and Technology Program and KAUST-HKUST Micro/Nanofluidic Joint Laboratory, Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.

Lab on a Chip
|April 15, 2010
PubMed
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This summary is machine-generated.

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A new method uses a surface-treated polydimethylsiloxane (PDMS) slab as a reusable transfer layer for fabricating multi-layer microfluidic chips. This technique ensures uniform layer thickness and precise alignment for 3D chip construction.

Area of Science:

  • Materials Science
  • Microfluidics
  • Chemical Engineering

Background:

  • Fabricating multi-layer microfluidic devices often requires complex alignment and precise control over layer thickness.
  • Polydimethylsiloxane (PDMS) is a widely used material in microfluidics due to its biocompatibility and flexibility, but achieving multi-layer structures can be challenging.

Purpose of the Study:

  • To develop a simple, repeatable, and cost-effective methodology for fabricating multi-layer polydimethylsiloxane (PDMS) microfluidic chips.
  • To demonstrate the utility of a novel transfer layer for precise layer alignment and thickness control in 3D microfluidic device construction.

Main Methods:

  • A polydimethylsiloxane (PDMS) slab was surface-treated with trichloro(1H,1H,2H,2H-perfluorooctyl)silane to create a reusable transfer layer.

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Published on: October 1, 2007

  • Surface treatment efficacy was verified using X-ray photoelectron spectroscopy (XPS) and contact angle measurements.
  • Bonding forces between PDMS layers were quantified to understand the transfer process.

    • Main Results:

    • The surface-treated PDMS transfer layer enabled uniform thickness and accurate alignment of patterned PDMS layers.
    • A 6-layer 3D PDMS microfluidic chip (50 µm per layer) was successfully fabricated, showcasing the technique's capability.
    • 3D fluorescence imaging confirmed the spatial integrity of the fabricated microfluidic structures.

    Conclusions:

    • The developed methodology offers a fast, simple, and repeatable approach for fabricating multi-layer PDMS microfluidic chips.
    • The technique is low-cost and amenable to mechanization for mass production, significantly advancing microfluidic device fabrication.
    • This method provides a viable solution for creating complex 3D microfluidic architectures with high precision.