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Updated: May 19, 2026
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Picoinjection of Microfluidic Drops Without Metal Electrodes
Published on: April 18, 2014
Electrode-free picoinjection of microfluidic drops.
Brian O'Donovan1, Dennis J Eastburn, Adam R Abate
1Department of Bioengineering and Therapeutic Sciences, California Institute for Quantitative Biosciences, University of California, San Francisco, San Francisco, California 94158, USA. brian.odonovan@ucsf.edu
Lab on a Chip
|August 30, 2012
Summary
New microfluidic methods eliminate metal electrodes for reagent injection. This simplifies fabrication and offers precise volume control using the injection fluid as the electrode.
Area of Science:
- Microfluidics
- Electrochemistry
- Biotechnology
Background:
- Conventional microfluidic reagent injection relies on integrated metal electrodes.
- This fabrication process is complex, time-consuming, and prone to errors.
- Existing methods lack precise control over injected volumes.
Purpose of the Study:
- To develop a simplified and more reliable method for reagent injection in microfluidic devices.
- To eliminate the need for fabricating metal electrodes on microfluidic chips.
- To achieve precise control over the volume of injected reagents.
Main Methods:
- A novel microfluidic injection technique was developed.
- The injection fluid, containing dissolved electrolytes, was utilized as the electrode.
- This approach exploits the conductive properties of the electrolyte solution.
Main Results:
- The method successfully obviates the need for external metal electrodes.
- Fabrication time and complexity were significantly reduced.
- Precise control over the volume of injected reagents was achieved.
Conclusions:
- The proposed method offers a streamlined and efficient approach to microfluidic reagent injection.
- Eliminating metal electrodes simplifies chip fabrication and enhances reliability.
- This technique provides a cost-effective and accurate solution for precise fluid handling in microfluidics.
