Principles of transverse flow fractionation of microparticles in superhydrophobic channelsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 августа 2015 г.
Аннотация:We propose a concept of fractionation of micron-sized particles in a microfluidic device with a bottom wall
decorated by superhydrophobic stripes. The stripes are oriented at an angle α to the direction of a driving
force, G, which generally includes an applied pressure gradient and gravity. Separation relies on the initial
sedimentation of particles under gravity in the main forward flow, and their subsequent lateral deflection
near a superhydrophobic wall due to generation of a secondary flow transverse to G. We provide some
theoretical arguments allowing us to quantify the transverse displacement of particles in the microfluidic
channel, and confirm the validity of theoretical predictions in test experiments with monodisperse fractions
of microparticles. Our results can guide the design of superhydrophobic microfluidic devices for efficient
sorting of microparticles with a relatively small difference in size and density.