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Acoustopipetting: Tunable Nanoliter Sample Dispensing Using Surface Acoustic Waves.

Jasmine O Castro1, Shwathy R Ramesan1, Huy D Dang2

  • 1School of Engineering , RMIT University , Melbourne , Victoria 3001 , Australia.

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|March 28, 2019
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This summary is machine-generated.

This study introduces a low-cost acoustomicrofluidic platform for precise nanoliter sample dispensing using nanoelectromechanical vibrations. The chipscale system achieves rapid, reproducible liquid handling for applications like drug toxicology assays.

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Area of Science:

  • Microfluidics
  • Acoustics
  • MEMS (Micro-Electro-Mechanical Systems)

Background:

  • Accurate and rapid liquid handling is crucial for various laboratory applications, including drug discovery and diagnostics.
  • Existing microfluidic dispensing systems often face challenges with cost, complexity, and precision at the nanoliter scale.

Purpose of the Study:

  • To develop and validate a robust, low-cost, and user-friendly acoustomicrofluidic platform for precise nanoliter sample dispensing.
  • To investigate the underlying physical mechanisms of vibration-induced jetting for liquid manipulation.
  • To demonstrate the platform's utility in biological assays and high-throughput screening.

Main Methods:

  • Utilizing high-frequency nanoelectromechanical vibrations (approx. 10 million g) to generate controlled liquid jets.
  • Developing a chipscale solid-state platform for sample ejection and deposition.
  • Implementing a sequential directional jetting strategy for array-based dispensing.

Main Results:

  • Achieved precise and reproducible dispensing of volumes down to 0.22 μL with a standard error of 6.5% and coefficient of variation of 11.3%.
  • Demonstrated the entire dispensing process occurs within approximately 10 ms.
  • Successfully applied the platform for serial dilution, concentration, and a cell-based drug toxicology assay.
  • Showcased efficient array dispensing through sequential directional jetting, reducing overall processing time.

Conclusions:

  • The developed acoustomicrofluidic platform offers a low-cost, user-friendly solution for rapid and precise nanoliter dispensing.
  • The technology has significant potential for automation and parallelization, enhancing laboratory workflow efficiency.
  • This platform can be broadly applied in microarrays, diagnostics, and drug toxicology screening.