Contact
    Start Publications Oscillating Ferrofluid Droplet Microrheology of Liquid-Immersed ...
    ←  Publication Finder
    Attension

    Oscillating Ferrofluid Droplet Microrheology of Liquid-Immersed Sessile Droplets

    Year: 2017

    Journal: Langmuir, Volume 33, JUN 27, page 6300–6306

    Authors: Backholm, Matilda; Vuckovac, Maja; Schreier, Jan; Latikka, Mika; Hummel, Michael; Linder, Markus B.; Ras, Robin H. A.

    Organizations: Academy of Finland (Centres of Excellence Programme) [304174]; Ruth and Nils-Erik Stenback Foundation

    The damped oscillations of liquid-immersed ferrofluid sessile droplets were studied with high-speed imaging experiments and analytical modeling to develop a novel microrheology technique. Droplet oscillations were induced with an external magnetic field, thereby avoiding transients in the resulting vibrational response of the droplet. By following the droplet relaxation with a high-speed camera, the frequency and relaxation time of the damped harmonic oscillations were measured. We extend upon existing analytical theories to describe our liquid-immersed sessile droplet system, and directly quantify the droplet relaxation with the viscosity of the internal and external fluid as well as the interfacial tension between these. The easily controllable magnetic droplets make our oscillating ferrofluid droplet technique a potential candidate for high-throughput microrheology and tensiometry in the future.
    View publication