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In situ Raman imaging of inter diffusion in a micro channel

J.-B. Salmon, A. Ajdari, P. Tabeling, L. Servant, D. Talaga, M. Joanicot — Applied Physics Letters 2005 (86) 094106

publié le , mis à jour le

This letter presents an experimental setup to probe the interdiffusion of various miscible and nonreacting liquids. A Raman confocal microscope allows us to image the local concentrations of two coflowing liquids in a microchannel. These steady-state measurements provide precise quantitative information about the kinetics of the interdiffusion process. For all the pairs of fluids investigated, we found this process to follow a classical diffusive scaling law with a interdiffusion coefficient D that depends on both liquids.

- Publié dans Applied Physics Letters