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    Custom density fluorescent tracer fabrication via microfluidics

    Year: 2021

    Journal: Exp. Fluids, Volume 62, APR

    Authors: Miezner, Meiran; Shaik, Subhani; Jacobi, Ian

    Organizations: United States-Israel Binational Science Foundation (BSF) [2014208]; Israel Science Foundation [1704/17]

    Keywords: Multi-phase flow; Particle image velocimetry; Microfluidics; Droplets

    A microfluidic system for creating custom density tracer particles with low polydispersity is described in which the particle density can be fine-tuned by varying the salt concentration in the core of a double-emulsion droplet. The droplets are generated in a glass-capillary, co-flow device and then solidified lithographically for use in a variety of flow experiments, including particle-image velocimetry and multi-phase flows. The novel use of solidified, double-emulsion droplets for flow tracers provides precise control of particle density, size, shape and fluorescent properties in a form that can be easily implemented in standard, macroscale laboratory settings.
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