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Design of a novel microreactor for microfluidic synthesis of silica nanoparticles

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3 Author(s)
Chung, C.K. ; Dep''t of Mech. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan ; Shih, T.R. ; Wu, B.H.

Conventional microreactors for nanoparticle synthesis were operated at low flow velocity as well as more residence time because of low mixing efficiency of the meander micromixer. Here, we purpose a simple obstacle micromixer to be operated at a wide range of flow velocity for increasing single-channel synthesis production rate of silica nanoparticles. Results show our obstacle micromixer has over 85% mixing efficiency covering the flow regions in both convection and diffusion mixing. This microreactor was used to synthesize silica nanoparticles with an average diameter of 200-250 nm. Enhancing fluid mixing at high flow velocity can result in high production rate.

Published in:

Solid-State Sensors, Actuators and Microsystems Conference, 2009. TRANSDUCERS 2009. International

Date of Conference:

21-25 June 2009