抄録
The effect of ionic diffusion on electric double layer (EDL) in the vicinity of the wall was investigated in a T-shaped microchannel. A large-area evanescent wave illumination technique and fluorescence imaging were applied to the measurement of two-dimensional distribution of EDL at the silica glass-electrolyte interface using a negative ion fluorescent dye, Alexa fluor 546. Moreover, the bulk velocity distribution and the diffusion distribution of K^+ were investigated by a micro-PIV technique and numerical simulation. It was concluded from these results that the spatial and temporal structure of EDL is affected by the convection and diffusion of K^+.
