抄録
In this paper, a micro PIV system is developed to visualize and to measure microscopic flow in a microchannel. The system is applied to two types of microchips using two types of tracer particles, i.e. a total of four cases. In order to estimate the electrophoretic velocities of the tracer particles, the ζ-potentials of the particles and the channels are measured using a laser ζ-potential meter. The velocities of electroosmotic flow are obtained from the velocities measured by PIV and the velocities estimated from ζ-potential measurement. The electroosmotic flow shows flat velocity profiles while there are some discrepancies among four cases due to changes in the ion density and the potential depending on combinations of microchannels and particles.
