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RESEARCH PAPER Time-resolved dynamics of laser-induced micro-jets

Time-resolved dynamics of laser-induced micro-jets
from thin liquid films
Matthew S. Brown Nicholas T. Kattamis
Craig B. Arnold
Received: 17 December 2010 / Accepted: 10 March 2011
Springer-Verlag 2011
Abstract Laser-induced forward transfer (LIFT) is a
high-resolution direct-write technique, which can print a
wide range of liquid materials without a nozzle. In this
process, a pulsed laser initiates the expulsion of a high-
velocity micro-jet of fluid from a thin donor film. LIFT
involves a novel regime for impulsively driven free-surface
jetting in that viscous forces developed in the thin film
become relevant within the jet lifetime. In this work, time-
resolved microscopy is used to study the dynamics of the
laser-induced ejection process. We consider the influence
of thin metal and thick polymer laser-absorbing layers on
the flow actuation mechanism and resulting jet dynamics.
Both films exhibit a mechanism in which flow is driven by


Source: Arnold, Craig B. - Department of Mechanical and Aerospace Engineering, Princeton University


Collections: Engineering; Materials Science