Abstract
This paper introduces optically controllable electrophoresis with a photoconductive substrate. Objective of this study is to control micro particles in fluid with laser irradiation. Micro Total Analysis Systems (μTAS) and Lab-on-a-chip have been developed in a medical and biological applications, and they have been intensively studied. The systems are expected to have more quick procedures and higher functionality. Photoconductive substrate is a kind of semiconductor, and its conductance is increased by optical irradiation. Electrophoresis is the motion of dispersed micro particles relative to a fluid under the influence of a spatially uniform electric field. By combining property of photoconductive substrate and electrophoresis, we can achieve micro particles operation without flow channel. We believe that this technique contributes to development of the high functionality analysis devices.
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