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Parallel Microdispensing Method of High-Viscous Liquid Based on Electrostatic Force.

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  • 1Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian 116024, China.

Micromachines
|April 23, 2022
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A novel smart printing head enables parallel microdispensing of high-viscous liquids in nanoliter volumes. This device achieves high repeatability with a simple design, controlling droplet volume via probe size and lifting velocity.

Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Fluid Dynamics

Background:

  • Parallel microdispensing of high-viscous liquids is crucial for various industrial applications.
  • Existing methods face challenges in achieving precise and repeatable dispensing at the nanoliter scale.

Purpose of the Study:

  • To develop a smart printing head for parallel microdispensing of high-viscous liquids.
  • To analyze the influence of probe interactions on the dispensing process.
  • To investigate methods for controlling droplet volume and transfer.

Main Methods:

  • Development of a smart printing head with probe array, electric control, and force measurement modules.
  • Analysis of probe interaction effects during the loading process.
  • Implementation of a serial electrical loading and parallel transfer printing strategy.
Keywords:
microdispensingparallel transfer printingprinting head

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  • Experimental investigation of factors influencing transfer printing volume, including probe size and lifting velocity.

    • Main Results:

    • Achieved parallel dispensing of high-viscous liquids in nanoliter volumes with high repeatability.
    • Identified significant interacting effects between probes impacting the loading process.
    • Demonstrated that droplet volume is controlled by probe lifting velocity and probe size, not contact force.
    • Validated the effectiveness of the serial loading and parallel transfer strategy.

    Conclusions:

    • The developed smart printing head offers a simple yet effective solution for highly repeatable parallel microdispensing of high-viscous liquids.
    • The findings provide insights into optimizing probe interactions and controlling dispensing parameters for microfluidic applications.
    • The method presents a significant advancement for industrial processes requiring precise nanoliter-scale liquid handling.