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A hinge-based aligner for fast, large-scale assembly of microfluidic chips.

Lei Mou1,2, Binfeng Hu1,2, Jiangjiang Zhang1,2

  • 1Beijing Engineering Research Center for BioNanotechnology and CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology, No. 11 Zhongguancun Beiyitiao, Beijing, 100190, People's Republic of China.

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|July 6, 2019
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This study introduces a novel hinge aligner for microfluidic chips, enabling precise alignment and integrated valve control. This innovation enhances reproducibility in biomarker detection for microfluidic devices.

Keywords:
Chip alignerImmunoassayMicrofluidicsPOCT

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Area of Science:

  • Microfluidics
  • Biotechnology
  • Analytical Chemistry

Background:

  • Microfluidic devices offer significant potential but face challenges in chip alignment and on-chip valve control.
  • Current methods lack speed, simplicity, and robust sealing for commercial applications.

Purpose of the Study:

  • To develop a fast, straightforward, and reliable method for aligning microfluidic chips.
  • To integrate an easy-to-control, fully sealed on-chip valve system.

Main Methods:

  • A novel hinge aligner was designed, utilizing two chip holders connected by a hinge mechanism.
  • Pre-designed recesses in the chip holders allow for precise chip placement and alignment.
  • The aligner facilitates the implementation of a leak-proof on-chip valve capable of withstanding high temperatures.

Main Results:

  • The hinge aligner achieves a chip alignment resolution of 20 μm.
  • The integrated on-chip valve demonstrated effective sealing of aqueous liquids at 80°C for 30 minutes.
  • Real immunoassay results showed improved reproducibility in detecting protein biomarkers at various concentrations.

Conclusions:

  • The hinge aligner provides a robust solution for microfluidic chip alignment and valve integration.
  • This approach enhances the reliability and commercial viability of microfluidic diagnostic tools.
  • The technology shows promise for improved biomarker detection in microfluidic assays.