Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 46: Micro- and Nanofluidics II

CPP 46.1: Topical Talk

Freitag, 18. März 2011, 10:30–11:00, ZEU 222

Droplet-based microfluidics and the dynamics of emulsions — •Jean-Christophe Baret — Max-Planck Institute for Dynamics and Self-organization

Emulsions are complex fluids already involved for a long time in a wide-range of industrial processes, such as, for example, food, cosmetics or materials synthesis [1]. More recently, applications of emulsions have been extended to new fields like biotechnology or biochemistry where the compartmentalization of compounds in emulsion droplets is used to parallelize (bio-)chemical reactions [2,3]. Interestingly, these applications pinpoint to fundamental questions dealing with surfactant dynamics, dynamic surface tension, hydrodynamic interactions and electro-hydrodynamics. Droplet-based microfluidics is a very powerful tool to quantitatively study the dynamics of emulsions at the single droplet level or even at the single interface level: well-controlled emulsions are produced and manipulated using hydrodynamics, electrical forces, optical actuation and combination of these effects. We will describe here how droplet-based microfluidics is used to extract quantitative informations on the physical-chemistry of emulsions for a better understanding and control of the dynamics of these systems.

[1] J. Bibette et al. Rep. Prog. Phys., 62(6), 969-1033 (1999) [2] A.D. Griffiths and D. Tawfik, Trends in Biotechnology, 24(9), 395-402 (2006) [3] J.-C. Baret et al. Chem. Biol., 17(5), 528-536 (2010)