Abstract − Analytical Sciences, 20(3), 423 (2004).
Migration Analysis of Micro-Particles in Liquids Using Microscopically Designed External Fields
Hitoshi WATARAI, Hideaki MONJUSHIRO, Satoshi TSUKAHARA, Masayori SUWA, and Yoshinori IIGUNI
Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
The recent development of new migration methods of micro-particles in liquids using various external fields is reviewed. The combination of a laser scattering force and a photothermal effect produced photothermal-conversion laserphotophoresis. A dielectric field generated in a planer or a capillary quadrupole electrode realized dielectrophoresis. Using a micrometer-scaled magnetic field gradient, the “Magnetophoretic velocimetry” of micro-particles was invented. Furthermore, the Lorentz force generated by combining an electric field and a magnetic field was utilized for electromagnetophoresis. These new methods were overlooked and the advantages in analytical use were discussed.
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