Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4838616
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Funding
- HKUST [DAG12EG07-13]
- National Science Foundation of China [61006086]
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We report a facile method for measuring interfacial tension (IFT, gamma) of immiscible fluids using a microfluidic device. The IFT is determined by monitoring the pressure drop across a microchannel, where a pair of modified Laplace sensors (formed by tapered channels) are connected, and the curvatures of the interfaces in the tapered channels. The method was tested with the model oil/water systems, and the results agreed well with a commercial tensiometry. We expect this method to be easily implemented in common microfluidic laboratories and supply a low-cost and fast way for interfacial tension measurement. (C) 2013 AIP Publishing LLC.
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