Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 222 for “"laser ablation"”.
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Laser ablation ICP spectrometry.
This thesis reports investigations into laser ablation inductively coupled plasma emission spectrometry for rapid elemental analysis of a diverse range of samples: glasses, aqueous solutions, oils, coated steels and glasses, and biological samples.Bulk analysis of glasses for major, minor and trace …
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Extreme ultraviolet probing of laser ablation
… of extreme ultraviolet (EUV) sources in probing laser ablation and material opacity. The radiation hydrodynamic codes POLLUX and h2d are used to study the Rayleigh-Taylor instability in a regime relevant to inertial fusion energy and, in support of experimental effort, to test the feasibility of …
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SYNTHESIS OF NANOCOMPOSITES BY LASER ABLATION
… of gold nanoparticles with immunoglobulin E by laser ablation of Au in a liquid solution. The colloidal stability and the size distribution of the resulting bio-nanoconjugates were examined with UV-Visible spectroscopy (UV-Vis), dynamic light scattering (DLS), and transmission electron …
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Laser ablation sample transfer for mass spectrometry
… spectrometry was developed that uses an infrared laser to ablate materials under ambient conditions that are captured in a solvent or on a surface. An infrared optical parametric oscillator (OPO) laser system at 3 μm wavelength was focused onto samples for ablation at atmospheric pressure. The …
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DIAGNOSTICS AND REAL-TIME MONITORING OF PULSED LASER ABLATION
… and real-time monitoring during pulsed laser ablation of solid materials are investigated. It is found that acoustic, optical and electric signals generated are closely related to laser processing conditions, material surface and bulk properties. A wide band microphone is used to record …
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Fundamental mechanisms of pulsed laser ablation of biological tissue
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1994.
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Laser ablation for sample introduction in inductively coupled plasma spectrometry.
The aim of this research was to investigate laser ablation as a means of sample introduction for the Inductively Coupled Plasma (ICP). This involved the configuration of an ICP spectrometer, a laser and a novel laser ablation chamber. The latter offered the facility of electrothermally heating …
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Field emission of ZnO nano-structures produced by laser ablation
… designed to investigate the properties of laser produced plasmas, with in-situ time of flight mass spectrometry, for deposition of ZnO materials for applications as field electron emission sources. The results from the work are concerned with the study of the important physical processes …
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Prediction of Laser Ablation In Brain: Sensitivity, Calibration, and Validation
<p>The surgical planning of MR-guided laser induced thermal therapy (MRgLITT) stands to benefit from predictive computational modeling. The dearth of physical model parameter data leads to modeling uncertainty. This work implements a well-accepted framework with three key steps for model-building: …
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Minimally invasive treatment of venous insufficiency using endovenous laser ablation
… series; the endothermal technique of endovenous laser ablation (EVLA) appeared to have the highest technical efficacy with a good safety record. Objectives Three studies were performed with the aim of perfecting the ablative procedure and evaluating it against the gold standard of conventional …
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Laser Ablation Propulsion: Synthesis and Analysis of Materials and Impulse Measurements
Among the many possible applications of laser ablation one of the more recent taken is related to nanosatellites propulsion. The study of Laser Ablation Propulsion (LAP) requires research activity on different fields like high power pulsed lasers, laser ablation itself, because it is still a …
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Pulsed laser ablation deposition and optical characterization of hexagonal-wurtzite silicon
… a simple deposition system demonstrated that laser ablation of the standard cubic-diamond silicon produces droplets containing hexagonal-wurtzite crystallites. In order to study the process parameters and to deposit larger hexagonal crystals, a new pulsed laser ablation system with variable …
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Synthesis and Characterization of Nanocrystalline Niobium Aluminides by Laser Ablation Technique
… of nanocrystalline Nb-aluminides by laser ablation in an ambient gas atmosphere. The goal of this work is to establish the science base for the nanocrystalline synthesis by this method by studying the relationships between processing conditions and physical characteristics of …
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The role of chromophore on pulsed laser ablation of biological tissue
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Nanostructured diamond-like carbon by dual pulsed laser ablation-pulsed gas feeding
… was deposited at room temperature by Pulsed Laser Ablation in a methane atmosphere on corning glass and silicon substrate. The structures of Diamond-like carbon film such the surface morphology and the composition has been studied by the scanning electron microscopy (SEM) and X-ray …
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Pulsed laser ablation of calcified biological tissue : physical mechanisms and clinical applications
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Engineering, 1991
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