Displacement of particles in microfluidics by laser-generated tandem bubbles.
The dynamic interaction between laser-generated tandem bubble and individual polystyrene particles of 2 and 10 μm in diameter is studied in a microfluidic channel (25 μm height) by high-speed imaging and particle image velocimetry. The asymmetric collapse of the tandem bubble produces a pair of microjets and associated long-lasting vortices that can propel a single particle to a maximum velocity of 1.4 m∕s in 30 μs after the bubble collapse with a resultant directional displacement up to 60 μm in 150 μs. This method may be useful for high-throughput cell sorting in microfluidic devices.
Department of Mechanical Engineering and Materials Science, Duke University, P.O. Box 90300, Durham, North Carolina 27708, USA.
Jaclyn
J
Lautz
Georgy
G
Sankin
Fang
F
Yuan
Pei
P
Zhong