Measuring electrical properties of microbeads by dielectrophoretic mobility

Author

Haapalainen, Mikko ; Mäkynen, Anssi

Author_Institution

Meas. & Sensor Lab., Univ. of Oulu, Kajaani, Finland

fYear

2011

fDate

10-12 May 2011

Firstpage

1

Lastpage

4

Abstract

A method for measuring the electrical properties of spherical microparticles is demonstrated. The method is based on measuring particle mobility caused by the dielectrophoretic (DEP) force set off by a linearly decreasing electric field. Polystyrene-carboxylate microbeads of various sizes were used as targets, conductive potassium chloride dilution was used as their carrier fluid and transparent hyperbolic quadrupole electrode geometry was used to produce the linear field gradient. The measured permittivities and conductivities of the microbeads show good repeatability irrespective of their size.

Keywords

electrical conductivity measurement; electrophoresis; gradient methods; nanoparticles; particle size measurement; permittivity measurement; conductivity measurement; dielectrophoretic mobility; electrical properties measurement; linear field gradient; permittivity measurement; polystyrene-carboxylate microbeads; spherical microparticles; Atmospheric measurements; Conductivity; Dielectrophoresis; Electric fields; Electrodes; Force; Particle measurements; ITO-electrode; dielectrophoresis; microparticle;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE

Conference_Location

Binjiang

ISSN

1091-5281

Print_ISBN

978-1-4244-7933-7

Type

conf

DOI

10.1109/IMTC.2011.5944127

Filename

5944127