Microfluidic vortex focusing for high throughput synthesis of size-tunable liposomes

Jung Yeon Han, Joseph N. Fiandra and Don L. DeVoe ()
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Jung Yeon Han: University of Maryland
Joseph N. Fiandra: University of Maryland
Don L. DeVoe: University of Maryland

Nature Communications, 2022, vol. 13, issue 1, 1-12

Abstract: Abstract Control over vesicle size during nanoscale liposome synthesis is critical for defining the pharmaceutical properties of liposomal nanomedicines. Microfluidic technologies capable of size-tunable liposome generation have been widely explored, but scaling these microfluidic platforms for high production throughput without sacrificing size control has proven challenging. Here we describe a microfluidic-enabled process in which highly vortical flow is established around an axisymmetric stream of solvated lipids, simultaneously focusing the lipids while inducing rapid convective and diffusive mixing through application of the vortical flow field. By adjusting the individual buffer and lipid flow rates within the system, the microfluidic vortex focusing technique is capable of generating liposomes with precisely controlled size and low size variance, and may be operated up to the laminar flow limit for high throughput vesicle production. The reliable formation of liposomes as small as 27 nm and mass production rates over 20 g/h is demonstrated, offering a path toward production-scale liposome synthesis using a single continuous-flow vortex focusing device.

Date: 2022
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DOI: 10.1038/s41467-022-34750-3

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