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Biomicrofluidics. 2016 Jan 13;10(1):014104. doi: 10.1063/1.4940038. eCollection 2016 Jan.

Continuous-wave laser generated jets for needle free applications.

Author information

1
Departamento de Óptica, Instituto Nacional de Astrofísica , Óptica y Electrónica, Apartado Postal 51 y 216, 72000 Puebla, Pue., Mexico.
2
Physics of Fluids Group, MESA+ Institute and Faculty of Science and Technology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands.
3
Mesoscale Chemical Systems Group, MESA+ Institute and Faculty of Science and Technology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands.

Abstract

We designed and built a microfluidic device for the generation of liquid jets produced by thermocavitation. A continuous wave (CW) laser was focused inside a micro-chamber filled with a light-absorbing solution to create a rapidly expanding vapor bubble. The chamber is connected to a micro-channel which focuses and ejects the liquid jet through the exit. The bubble growth and the jet velocity were measured as a function of the devices geometry (channel diameter D and chamber width A). The fastest jets were those for relatively large chamber size with respect to the channel diameter. Elongated and focused jets up to 29 m/s for a channel diameter of [Formula: see text] and chamber size of [Formula: see text] were obtained. The proposed CW laser-based device is potentially a compact option for a practical and commercially feasible needle-free injector.

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