Abstract
In this research, non-intrusive imaging of concentration distribution was performed in the vicinity of a microchannel wall using total internal reflection Raman scattering excited by the evanescent wave. The Raman spectra of H_2O and D_2O are different due to the O-H bond and the O-D bond. The near-wall concentration of H2_O and D_2O were calculated from Raman intensities obtained from a mixing flow field in a T-shaped microchannel. The concentration distributions were successfully acquired at various flow rates by applying calibration curves which represent the relationships between concentrations and Raman intensities.
