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Picoinjection of Microfluidic Drops Without Metal Electrodes
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An Acoustofluidic Picoinjector.

Ty Naquin1, Shivam Jain1, Jinxin Zhang1

  • 1Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.

Sensors and Actuators. B, Chemical
|August 12, 2024
PubMed
Summary
This summary is machine-generated.

We developed an acoustofluidic picoinjector for precise, energy-efficient, and biocompatible material delivery into droplets. This technology enhances droplet microfluidics for chemical and biomedical research applications.

Keywords:
Acoustofluidicsdroplet microfluidicsnanoparticle synthesispicoinjection

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Area of Science:

  • Microfluidics
  • Acoustofluidics
  • Biomedical Engineering

Background:

  • Droplet microfluidics enables high-throughput assays in independent microenvironments.
  • Picoinjection into droplets is crucial but faces challenges like high power needs, poor biocompatibility, and limited control.
  • Existing picoinjection methods hinder the full potential of droplet microfluidic applications.

Purpose of the Study:

  • To introduce a novel acoustofluidic picoinjector for precise, energy-efficient, and biocompatible reagent delivery into droplets.
  • To overcome the limitations of current picoinjection techniques in droplet microfluidics.
  • To demonstrate the platform's utility in chemical and biomedical research.

Main Methods:

  • Utilizing acoustic pressure at the droplet interface for controlled picoinjection.
  • Performing acid-base titrations by iterative picoliter reagent injection into droplets.
  • Synthesizing metallic nanoparticles using the acoustofluidic picoinjector.

Main Results:

  • Demonstrated on-demand, energy-efficient, and highly precise picoinjection.
  • Successfully induced pH transitions in droplets via iterative reagent addition.
  • Produced highly monodisperse and reproducible metallic nanoparticles, outperforming bulk methods.

Conclusions:

  • The acoustofluidic picoinjector offers a precise, energy-efficient, and biocompatible solution for droplet microfluidics.
  • This technology expands the capabilities of droplet microfluidics for diverse chemical and biological applications.
  • Enables accurate reagent and sample delivery, broadening research possibilities.