Controllable production of Janus ligaments by AC fields in a flow-focusing junction

Elena De Castro-Hernández* (Corresponding Author), Pablo García-Sánchez, Marta Leon Rodriguez, David Fernandez Rivas, Antonio Ramos (Corresponding Author)

*Corresponding author for this work

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We report the production of bicomponent Janus filaments of miscible aqueous fluids in a micro- fluidic electro-flow focusing device under the action of an AC electric field. The production of liquid filaments can lead to the generation of microfibers by adding a subsequent process of polymerization. Janus microfi- bers are of paramount importance in biomedical appli- cations such as tissue production on crimped scaffolds. We show that the filament length is a function of the frequency signal, voltage amplitude and of the visco- sity and conductivity of the dispersed phase. In par- ticular, Janus filaments with diameters ∼ 10μm and longer than 1 mm are produced by AC voltages with frequencies below 150 kHz and a viscosity of the dis- persed phase ∼ 10 cP.
Original languageEnglish
Article number10
Pages (from-to)10
Number of pages5
JournalMicrofluidics and nanofluidics
Issue number1
Publication statusPublished - 2 Jan 2019


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