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Modeling and optimization of planar microcoils

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Modeling and optimization of planar microcoils

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Title: Modeling and optimization of planar microcoils
Author: Beyzavi, Ali; Nguyen, Nam-Trung
Copyright year: 2008
Abstract: Magnetic actuation has emerged as a useful tool for manipulating particles, droplets and biological samples in microfluidics. A planar coil is one of the suitable candidates for magnetic actuation and has the potential to be integrated in digital microfluidic devices. A simple model of microcoils is needed to optimize their use in actuation applications. This paper first develops an analytical model for calculating the magnetic field of a planar microcoil. The model was validated by experimental data from microcoils fabricated on printed circuit boards (PCB). The model was used for calculating the field strength and the force acting on a magnetic object. Finally, the effect of different coil parameters such as the magnitude of the electric current, the gap between the wires and the number of wire segments is discussed. Both analytical and experimental results show that a smaller gap size between wire segments, more wire segments and a higher electric current can increase both the magnitude and the gradient of the magnetic field, and consequently cause a higher actuating force. The planar coil analyzed in the paper is suitable for applications in magnetic droplet-based microfluidics.
Subject: DRNTU::Engineering::Mechanical engineering
Type: Journal Article
Series/ Journal Title: Journal of micromechanics and microengineering
School: School of Mechanical and Aerospace Engineering
Rights: © 2008 IOP Publishing Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Micromechanics and Microengineering, IOP Publishing Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: DOI:[http://dx.doi.org.ezlibproxy1.ntu.edu.sg/10.1088/0960-1317/18/9/095018].
Version: Accepted version

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