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Micro-/Nanofluidic Diffusiophoresis Platform for Simple Concentration and Extraction of Particles Using Ionic Solutions

Authors :
Sang Jin Seo
Taesung Kim
Dogyeong Ha
Source :
2019 IEEE 32nd International Conference on Micro Electro Mechanical Systems (MEMS).
Publication Year :
2019
Publisher :
IEEE, 2019.

Abstract

This paper reports a novel diffusiophoresis-based particle manipulator for the concentration and extraction on-demand using a nanochannel-integrated microfluidic channel network fabricated by the crack-photolithography. The nanochannel regulates the physiochemical environments in the microfluidic channel by suppressing convection flows, making it possible to produce a long-term and stable concentration gradient of target solutes over the microchannel. This unique feature facilitates the rapid and dynamic manipulation of chemically driven transport of particles by simply switching ionic solutions. As a result, this platform successfully achieved about 330-fold concentration of $1- \mu \mathrm{m}$ -polystyrene particles in 120 min and their extraction in 10 min with a 95% ratio by simply reverting the concentration gradient of the solutions without any electronic power sources and fluidic controllers.

Details

Database :
OpenAIRE
Journal :
2019 IEEE 32nd International Conference on Micro Electro Mechanical Systems (MEMS)
Accession number :
edsair.doi...........5dad2831174b2d7254f04a826d693b19
Full Text :
https://doi.org/10.1109/memsys.2019.8870645