Abstract
Gold nanoparticles in aqueous dispersion were synthesized on a glass microfluidic device using the liquid-phase reduction method. The device with Y type microchannel, which is 200 μm in width and 80 μm in depth, was fabricated using a combination process of a micropowder blasting and a glass fusion bonding. Tetrachloroauric (III) acid and sodium citrate aqueous solution were used as Au ion and reduction agent. These agents were mixed in the microchannel, and visible ray absorption spectrum of the synthesized gold nanoparticles aqueous solution was evaluated. The effect of a flow rate on an absorption spectra of the synthesized gold nanoparticles was reported in this paper.
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