NDLI: An RC-Model for Dielectrophoresis of Ellipsoidal Cells: A Method for Determnination of Dielectric Properties

Content Provider	IEEE Xplore Digital Library
Author	Bunthawin, S. Wanichapichart, P.
Copyright Year	2007
Description	Author affiliation: Dept. of Phys., Prince of Songkla Univ., Songkhla (Bunthawin, S.; Wanichapichart, P.)
Abstract	This work proposes an RC-model representing an ellipsoidal cell being induced in an AC electric field. The frequency dependent complex function of the induced cell dipole moment is expressed in terms of real and imaginary parts, which explains cell dielectric properties. This approach provides a simpler method so that only three values are required from experimentation. There are two critical frequencies at the lower $(f_{clscr})$ and the higher $(f_{ch}$ ) boundary which determine cross over points from negative to positive DEP force exerting on the cell and vice versa. By increasing the solution conductivity $(sigma_{s}),$ these frequencies converge and join as soon as the $sigma_{s},$ reaches a critical $value(sigma_{ct}).$ Under this critical conductivity the cell experiences a zero force, and the conductivity of the cytoplasm $(sigma_{c})$ can be predicted. This work reveals permittivity and conductivity of the membrane and the cytoplasm of yeasts.
Starting Page	472
Ending Page	477
File Size	5173674
Page Count	6
File Format	PDF
ISBN	1424406102
DOI	10.1109/NEMS.2007.352061
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-01-16
Publisher Place	Thailand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectrophoresis Dielectrics Conductivity Biomembranes Electric fields Permittivity Educational institutions Frequency dependence Fungi Force measurement yeast cells ellipsoids RC-model
Content Type	Text
Resource Type	Article

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