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Issue 8, 2021

Precision ejection of microfluidic droplets into air with a superhydrophobic outlet

Author affiliations

Abstract

Dispensing micron-scale droplets from a suspended nozzle is important for applications in bioprinting, analytical chemistry, and pharmaceutical formulation. Here, we describe a general approach to eject droplets from microfluidic devices using superhydrophobic patterning; this facilitates release of wetted fluids, allowing droplets to break contact with channel surfaces and travel along regular paths to achieve a printing accuracy of ∼3 μm. We demonstrate the utility of the approach by using it to print droplets of varied composition from a microfluidic mixing device. Our approach is compatible with common fabrication techniques making it applicable to devices configured for diverse applications.

Graphical abstract: Precision ejection of microfluidic droplets into air with a superhydrophobic outlet

Supplementary files

Article information


Submitted
29 Dec 2020
Accepted
27 Feb 2021
First published
01 Mar 2021

Lab Chip, 2021,21, 1484-1491
Article type
Paper

Precision ejection of microfluidic droplets into air with a superhydrophobic outlet

P. Zhang, K. Chang and A. R. Abate, Lab Chip, 2021, 21, 1484 DOI: 10.1039/D0LC01327G

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