Investigation of nanosecond and femtosecond pulsed laser deposition and application of some metal nanoparticle films
Citation:
Inam Mirza, 'Investigation of nanosecond and femtosecond pulsed laser deposition and application of some metal nanoparticle films', [thesis], Trinity College (Dublin, Ireland). School of Physics, 2012, pp 278Download Item:
Abstract:
Pulsed laser deposition (PLD) is a convenient and flexible technique which can be applied
to all elemental and compound solids. In conventional PLD a nanosecond (ns) laser is
used to ablate the surface of a solid target and a small amount of material expands rapidly
from the target as an ionised vapour plume. Condensation of the plume on a non-wetting
substrate, together with surface diffusion, leads to the formation of a nanoparticle film;
the thickness is controlled by the number of laser pulses. On the other hand with
femtosecond (fs) laser irradiation, very rapid heating leads to nanoscale fragmentation of
a small amount of target material. Nanoparticles are expelled from the target and can be
captured on a substrate. In the present work we have studied the ns- and fs-PLD of some
noble and transition metals in vacuum for laser fluence well above the ablation threshold
(-1.5 J cm -2). A range of techniques such as Langmuir ion probe, the time and space
resolved fast imaging and optical emission spectroscopy and electron microscopy was
applied to characterize the laser ablation plumes and to study the morphology of
nanoparticle films.
Author: Mirza, Inam
Advisor:
Lunney, James GerardQualification name:
Doctor of Philosophy (Ph.D.)Publisher:
Trinity College (Dublin, Ireland). School of PhysicsNote:
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Physics, Ph.D., Ph.D. Trinity College Dublin.Metadata
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