caa a22 4500 463235363 CHVBK 20180405153255.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10404-007-0151-x doi (NATIONALLICENCE)springer-10.1007/s10404-007-0151-x A dielectrophoretic barrier-based microsystem for separation of microparticles [Elektronische Daten] [Dafeng Chen, Hejun Du] This paper presents a microfluidic system for separation of microparticles based on the use of dielectrophoretic barriers, which are constructed by aligning two layers of microelectrode structure face-to-face on the top and bottom sides of the microchannel. The energized barriers tend to prevent the particles in the flow from passing through. However, particles may penetrate the barriers if a sufficiently high flow rate is used. The flow velocity at which the particles begin to penetrate the barrier is defined as threshold velocity. Different particles are of different threshold velocities so that they can be separated. In this paper, the electrodes are configured with open ends and aligned with a certain angle to the direction of the flow. Polystyrene microbeads of different sizes (i.e., 9.6 and 16μm in diameter) are studied in the tests. Under the experimental conditions, two particle trajectories are observed: the 9.6μm beads penetrate the barriers and move straightly toward the fluidic outlet, while the 16μm beads snake their way along the electrode edges at a relatively low speed. The two subpopulations of particles are separated into spatial distance of ∼10mm within tens of seconds. The system presents a rapid and dynamic separation process within a continuous flow. Springer-Verlag, 2007 Dielectrophoresis nationallicence DEP barrier nationallicence Particle separation nationallicence Chen Dafeng School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore, Singapore aut Du Hejun School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore, Singapore aut Microfluidics and Nanofluidics Springer-Verlag 3/5(2007-10-01), 603-610 1613-4982 3:5<603 2007 3 10404 https://doi.org/10.1007/s10404-007-0151-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10404-007-0151-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen Dafeng School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore, Singapore aut NATIONALLICENCE 700 1- Du Hejun School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore, Singapore aut NATIONALLICENCE 773 0- Microfluidics and Nanofluidics Springer-Verlag 3/5(2007-10-01), 603-610 1613-4982 3:5<603 2007 3 10404 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer