Title :
Micro-volume dielectric measurements on high permittivity solutions: correlation with results from single-particle electro-manipulation
Author :
Arnold, W.M. ; Turner, G.C.
Author_Institution :
Sensors & Electron. Group, Ind. Res. Ltd., Lowe Hutt, New Zealand
Abstract :
The forces that determine the a.c. electrokinetics of microparticles depend on the relative dielectric properties of the particles or biological cells with respect to their suspending media. A method for measurement of the properties of very small quantities of medium is therefore desirable. A suitable measurement chamber consisting of a planar interdigitated electrode array surrounded by an insulating pedestal can be fashioned by lithographic and micro-machining techniques. Volumes of 1 μl or even less are measurable. The original purpose of the electrode structures, namely to microposition particles and single cells, is also described
Keywords :
dielectric liquids; dielectric measurement; electrokinetic effects; permittivity; solutions; suspensions; AC electrokinetics; biological cell; dielectric properties; high permittivity solution; insulating pedestal; lithography; micro-volume dielectric measurement; micromachining; microparticle; micropositioning; planar interdigitated electrode array; single-particle electromanipulation; suspension; Biological cells; Dielectric measurements; Dielectrophoresis; Electrodes; Electrokinetics; Force measurement; Glass; Inductance; Permittivity; Polarization;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1998. Annual Report. Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5035-9
DOI :
10.1109/CEIDP.1998.734019
