Continuous tuneable droplet ejection via pulsed surface acoustic wave jetting

Oliveira Almeida Camara Castro, J, Ramesan, S, Rezk, A and Yeo, L 2018, 'Continuous tuneable droplet ejection via pulsed surface acoustic wave jetting', Soft Matter, vol. 14, pp. 5721-5727.


Document type: Journal Article
Collection: Journal Articles

Title Continuous tuneable droplet ejection via pulsed surface acoustic wave jetting
Author(s) Oliveira Almeida Camara Castro, J
Ramesan, S
Rezk, A
Yeo, L
Year 2018
Journal name Soft Matter
Volume number 14
Start page 5721
End page 5727
Total pages 7
Publisher The Royal Society of Chemistry
Abstract We report a miniaturised platform for continuous production of single or multiple liquid droplets with diameters between 60 and 500 mm by interfacing a capillary-driven self-replenishing liquid feed with pulsed excitation of focussed surface acoustic waves (SAWs). The orifice-free operation circumvents the disadvantages of conventional jetting systems, which are often prone to clogging that eventuates in rapid degradation of the operational performance. Additionally, we show the possibility for flexibly tuning the ejected droplet size through the pulse width duration, thus avoiding the need for a separate device for every different droplet size required, as is the case for systems in which the droplet size is set by nozzles and orifices, as well as preceding ultrasonic jetting platforms where the droplet size is controlled by the operating frequency. Further, we demonstrate that cells can be jetted and hence printed onto substrates with control over the cell density within the droplets down to single cells. Given that the jetting does not lead to significant loss to the cell's viability or ability to proliferate, we envisage that this versatile jetting method can potentially be exploited with further development for cell encapsulation, dispensing and 3D bioprinting applications.
Subject Acoustics and Acoustical Devices; Waves
Interdisciplinary Engineering not elsewhere classified
Fluidisation and Fluid Mechanics
DOI - identifier 10.1039/C7SM02534C
Copyright notice This journal is © The Royal Society of Chemistry 2018
ISSN 1744-6848
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