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|Title: ||Mechanical characterization of ultralow interfacial tension oil-in-water droplets by thermal capillary wave analysis in a microfluidic device|
|Authors: ||Bolognesi, Guido|
Tyler, Arwen I.I.
Ward, Andrew D.
Bain, Colin D.
|Issue Date: ||2016|
|Publisher: ||© American Chemical Society|
|Citation: ||BOLOGNESI, G. ...et al., 2016. Mechanical characterization of ultralow interfacial tension oil-in-water droplets by thermal capillary wave analysis in a microfluidic device. Langmuir, 32(15), pp. 3580-3586.|
|Abstract: ||© 2016 American Chemical Society.Measurements of the ultralow interfacial tension and surfactant film bending rigidity for micron-sized heptane droplets in bis(2-ethylhexyl) sodium sulfosuccinate-NaCl aqueous solutions were performed in a microfluidic device through the analysis of thermally driven droplet interface fluctuations. The Fourier spectrum of the stochastic droplet interface displacement was measured through bright-field video microscopy and a contour analysis technique. The droplet interfacial tension, together with the surfactant film bending rigidity, was obtained by fitting the experimental results to the prediction of a capillary wave model. Compared to existing methods for ultralow interfacial tension measurements, this contactless, nondestructive, all-optical approach has several advantages, such as fast measurement, easy implementation, cost-effectiveness, reduced amount of liquids, and integration into lab-on-a-chip devices.|
|Description: ||This is an Open Access Article. It is published by the American Chemical Society.|
|Sponsor: ||This work was supported by EPSRC grants EP/I0133 42/1 and EP/G00465X/1.|
|Publisher Link: ||http://dx.doi.org/10.1021/acs.langmuir.5b04702|
|Appears in Collections:||Published Articles (Chemical Engineering)|
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