Title :
Measuring electrical properties of microbeads by dielectrophoretic mobility
Author :
Haapalainen, Mikko ; Mäkynen, Anssi
Author_Institution :
Meas. & Sensor Lab., Univ. of Oulu, Kajaani, Finland
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;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE
Conference_Location :
Binjiang
Print_ISBN :
978-1-4244-7933-7
DOI :
10.1109/IMTC.2011.5944127
