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Updated: Sep 18, 2025

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Ultrasound-Enabled Spatial Multi-Droplet Manipulation on Slippery Surfaces.

Yahua Liu1, Ling Zhou1, Xu Wang1

  • 1State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, P. R. China.

ACS Applied Materials & Interfaces
|June 20, 2025
PubMed
Summary
This summary is machine-generated.

A new droplet ultrasonic bowl (DUB) enables precise, simultaneous control of multiple droplets on various surfaces. This contactless manipulation technology advances microfluidics and biomedicine.

Keywords:
droplet manipulationphased arrayslippery liquid-infused surfacetwin trapultrasound

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Area of Science:

  • Microfluidics and Nanotechnology
  • Biomedical Engineering
  • Energy Harvesting

Background:

  • Controllable droplet manipulation is vital for microfluidics, biomedicine, and energy harvesting.
  • Synchronous control of multiple droplets on single or spatially separated surfaces remains a significant challenge.

Purpose of the Study:

  • To develop a novel droplet ultrasonic bowl (DUB) for advanced multi-droplet manipulation.
  • To enable programmable and contactless control of droplets on slippery liquid-infused surfaces.

Main Methods:

  • Utilizing multiple twin-trap ultrasonic fields with dynamic quantity and position modulation.
  • Implementing the DUB on monolayer and double-layer surfaces for droplet control.
  • Demonstrating precise movement, synchronous position exchange, and simultaneous transport of multiple droplets.

Main Results:

  • Achieved programmable manipulation of single and multiple droplets, including precise movement and synchronous position exchange.
  • Successfully demonstrated synchronized manipulation of droplets on double-layer surfaces and steady control of pendant droplets.
  • Showcased applications in intelligent droplet circuits, spatial chemical reactions, and obstacle avoidance.

Conclusions:

  • The developed DUB offers a promising strategy for contactless multi-droplet manipulation.
  • This technology significantly advances capabilities in microfluidic applications.
  • The DUB system provides precise control for complex droplet operations.