抄録
We have developed Micro Optical Diffusion Sensor (MODS) based on a laser-induced dielectrophoresis (LIDEP), enabling high-speed measurement with a small sample volume. The diffusion coefficient is measured by observing a diffusion process of the samples. A sinusoidal concentration distribution induced by LIDEP is formed in microchannel, and the mass diffusion is observed by the First-order diffracted beam. The formation of the concentration distribution is a key of high-sensitive detection because it influence diffraction efficiency of the probing laser. In order to gain the measurement sensitivity, the numerical analysis of the DEP force distribution is required. In this paper, a new design of cell that can achieve the high-sensitive is presented.
