Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 172, Issue 2, Pages 546-551Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2011.09.019
Keywords
Microfluidic; Droplet; Valve; Micromixer
Funding
- China National Funds for Distinguished Young Scientists [50125309]
- National Natural Science Foundation of China [10904117, 10804087]
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A valve-based microfluidic micromixer was developed for multiply component droplets generation, manipulation and active mixing. By integrating pneumatic valves in microfluidic device, droplets could be individually generated, merged and well mixed automatically. Moreover, droplet volume could be controlled precisely by tuning loading pressure or the flow rate of the oil phase, and certain droplets fusion conditions were also investigated by adjusting the droplet driving times and oil flow rates. In these optimized conditions, fluorescence enhancement of droplets was used to detect Hg (II) ions in droplet by mixing with probe droplets (Rhodamine B quenched by gold nanoparticle). This method would have powerful potential for tiny volume sample assay or real-time chemical reaction study. (C) 2011 Elsevier B.V. All rights reserved.
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