Physics of Fluids - Publications

Laser-induced cavitation based micropump

Lab on a Chip 8, 1676–1681 (2008)

Authors

	Rory Dijkink
	Claus-Dieter Ohl

BibTeΧ

@Article{B806912C,
author ="Dijkink, Rory and Ohl, Claus-Dieter",
title  ="Laser-induced cavitation based micropump",
journal  ="Lab Chip",
year  ="2008",
volume  ="8",
issue  ="10",
pages  ="1676-1681",
publisher  ="The Royal Society of Chemistry",
doi  ="10.1039/B806912C",
url  ="http://dx.doi.org/10.1039/B806912C",
abstract  ="Lab-on-a-chip devices are in strong demand as versatile and robust pumping techniques. Here{,} we present a cavitation based technique{,} which is able to pump a volume of 4000 [small mu ]m3 within 75 [small mu ]s against an estimated pressure head of 3 bar. The single cavitation event is created by focusing a laser pulse in a conventional PDMS microfluidic chip close to the channel opening. High-speed photography at 1 million frames s-1 resolves the flow in the supply channel{,} pump channel{,} and close to the cavity. The elasticity of the material affects the overall fluid flow. Continuous pumping at repetition rates of up to 5 Hz through 6 mm long square channels of 20 [small mu ]m width is shown. A parameter study reveals the key-parameters for operation: the distance between the laser focus and the channel{,} the maximum bubble size{,} and the chamber geometry."}