Christiansen, Thomas Lehrmann1; Trosborg, Jacqueline4; Tanzi, Simone1; Larsen, Simon Tylsgaard5; Taboryski, Rafael J.1
1 Department of Micro- and Nanotechnology, Technical University of Denmark2 MEMS-AppliedSensors, Department of Micro- and Nanotechnology, Technical University of Denmark3 Polymer Micro & Nano Engineering, Department of Micro- and Nanotechnology, Technical University of Denmark4 Office for Study Programmes and Student Affairs, Administration, Technical University of Denmark5 Risø National Laboratory for Sustainable Energy, Technical University of Denmark
In this work the problem of separating small particles of di↵erent sizes is solved by developing a simple microfluidic device using pinched flow fractionation (PFF), a technique originally presented by Yamada et al. in 2004 . The present work takes the concept of PFF to the next level by making the device tunable using a simple pressure control. Through analytical calculations and FEM simulations in COMSOL, the required dimensions and operating pressures of the device was determined. The device was subsequently fabricated by injection molding of a COC TOPAS grade 5013 polymer (TOPAS Advanced Polymers GmbH) using a micro machined silicon master. The functionality of the device was confirmed using polymer beads, and by adjusting the pressure accordingly a complete separation of 2 μm and 4.5 μm beads was demonstrated.
Proceedings of Nsti-nanotech 2012, 2012, p. 470-473