Fast, active droplet interaction: Coalescence and reactive mixing controlled by electrowetting on a superhydrophobic surface

Year: 2013

Authors: Accardo A., Mecarini F., Leoncini M., Brandi F., Di Cola E., Burghammer M., Riekel C., Di Fabrizio E.

Autors Affiliation: Istituto Italiano di Tecnologia, Nanostructures Department, Via Morego, Genova 16163, Italy;
Istituto Italiano di Tecnologia, Nanophysics Department, Via Morego, Genova 16163, Italy;
European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France;
BIONEM Lab University of Magna Graecia, Campus Salvatore Venuta, Viale Europa, 88100 Germaneto-Catanzaro, Italy

Abstract: A novel electrowetting-on-dielectrics (EWOD) device in open planar geometry allows probing of droplet mixing on a superhydrophobic substrate under quasi contact-free conditions. We demonstrate a droplet-based microreactor with integrated convective-flow mixing for the reactive-mixing of CaCl 2/Na2CO3 solutions. The device provides unique conditions for scattering, spectroscopy and imaging probes requiring an unobstructed droplet-access.

Journal/Review: LAB ON A CHIP

Volume: 13 (3)      Pages from: 332  to: 335

More Information: We thank Marco Di Michiel from the ESRF-ID15 beamline for helping with the high-speed CMOS camera. This work was partially supported by the Italian project FIRB \’Rete Nazionale di Ricerca sulle Nanoscienze ItalNanoNet\’ of Italian Ministry of education and research (MIUR). A. A. thanks the ESRF for funding his PhD position.
KeyWords: Calcium carbonate; Electrowetting on dielectrics device; Hydrophobicity; Light scattering; Molecular probe; Spectroscopy
DOI: 10.1039/c2lc41193h

Citations: 42
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