Browsing PhD Dissertations - DO NOT EDIT by Title
Now showing items 21-40 of 82
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First-principles Studies On N-type And P-type Doping In Cuprous Oxide
(Materials Science & Engineering, 2012)We have performed studies on n-type and p-type cuprous oxide with and without doping by first principles methods. Generalized Gradient Approximation (GGA) is used for the geometry optimization. The total energy and the ... -
Fundamental Understanding Of Soot Induced Wear Mechanism Of Diesel Engines
(Materials Science & Engineering, 2014-09-17)Emission of Oxides of nitrogen and particulates matters from diesel engines have been reduced by implementing exhaust gas recirculation (EGR) protocols but at the expense of increased wear of engine components. This ... -
GOLD-NANOPARTICLE-BASED THERANOSTIC AGENTS FOR RADIOTHERAPY OF MALIGNANT SOLID TUMORS
(2016-09-15)Radiation therapy is one of the three major methods of cancer treatment. The fundamental goal of radiotherapy is to deliver high radiation doses to targets while simultaneously minimizing doses to critical structures and ... -
Grain Structure Evolution Of Tin-based Lead-free Solder Joints In Electronic Packaging Assembly And Its Impact On The Fatigue Reliability
(Materials Science & Engineering, 2014-03-12)Solder is one of the main joints materials used in the electronics for decades of years. It is not only the mechanical support but also conducts the electric signals in the electronics. However, the regulation of lead ... -
Growth Mechanism And Interface Effects On Microstructure Of Perovskite-type Barium Titanate-based Epitaxial Films
(Materials Science & Engineering, 2012-07-25)This work was motivated and focused on the growth mechanism, microstructures and interfaces of barium titanate, BaTiO₃ (BTO), based epitaxial thin films. Transimission electron microscopy (TEM), high resolution TEM (HRTEM), ... -
GUANIDINIUM BASED ANION EXCHANGE MEMBRANES FOR SOLID POLYMER ALKALINE FUEL CELL APPLICATIONS
(2015-12-09)Low temperature traditional PEM Fuel Cells and also other fuel cells in general suffer from the acute yet long standing issues of cost and performance. This has severely hindered the commercialization of fuel cells but ... -
Hierarchical microstructures to overcome the conflict between strength and toughness of hard coatings: TiN/Ni as a model system
(2022-07-13)In the recent times, industry's production speed has been increasing and thus, the production of parts needs to adapt and so do the materials used to manufacture them. Hence, tools exposed to more extreme conditions using ... -
An Innovative Epitaxial Growth Method For Minimizing Dislocations In Thin-film Quantum-dot Optoelectronic And Photovoltaic Device Applications
(Materials Science & Engineering, 2012-07-25)A new buffer layer method for epitaxial growth of lattice-mismatched semiconductor quantum-dots based p-i-n structures is presented. To our knowledge this is the first instance of a dislocation-reduction approach that ... -
INVESTIGATION OF HIGH-TEMPERATURE OXIDATION RESISTANCE MECHANISM OF CERAMIC COATINGS VIA MICROSTRUCTURE ANALYSIS
(2020-09-03)Recent developments of ceramic coatings deposited using magnetron reactive sputtering show that these films exhibited superior high-temperature oxidation resistance along with other desirable properties such as high hardness, ... -
Investigation of Microstructure Effects on Hardness and Oxidation Resistance of New Generation Ceramic Coatings
(2017-08-16)This work was motivated by the demand for a new generation of materials capable for harsh environment applications, and focused on developing a better understanding of the effects of elemental composition and microstructure ... -
INVESTIGATION OF THE PLASMA ELECTROLYTIC OXIDATION MECHANISM OF TITANIUM
Plasma electrolytic oxidation (PEO) is an environmentally friendly technology capable of forming coatings with excellent adhesion strength at high deposition rates. The PEO process is particularly attractive for forming ... -
INVESTIGATION OF THE PROCESSING-STRUCTURE-PROPERTY RELATIONSHIP IN Ta-Si-N NANOCOMPOSITE COATINGS
(2018-05-23)The present-day industry demands development of coatings for harsh environmental applications which can resist impact and oxidation at high temperatures. It is vitally important to develop new hard (>30 GPa) protective ... -
INVESTIGATION OF THE SURFACE TOPOLOGY CHANGES ASSOCIATED WITH FATIGUE
(2019-05-17)Metals have long been known to change their surface topology when subjected to a plastic strain. Given that a plastic zone exists at the tip of a propagating crack, it would seem natural to quantitatively study surface ... -
INVESTIGATION OF THERMOPHYSICAL PROPERTIES OF ENHANCED MOLTEN SALT NANOFLUIDS FOR THERMAL ENERGY STORAGE (TES) IN CONCENTRATED SOLAR POWER (CSP) SYSTEMS
(2018-01-16)Concentrated solar power (CSP) technologies have a great economical and technical potential for energy production in future. Its incorporation with thermal energy storage (TES) overcomes one of the biggest challenges in ... -
Investigation On The Mechanism Of Interface Electromigration (EM) In Copper (Cu) Thin Films
(Materials Science & Engineering, 2007-08-23)This study concerns the mechanism of the interface electromigration (EM) in copper (Cu) thin films. While EM in Cu is one of the most concerned reliability failure phenomena in Cu interconnects used microelectronic devices, ... -
Investigation On Thermo-mechanical Instability Of Porous Low Dielectric Constant Materials
(Materials Science & Engineering, 2013-03-20)This study investigates the structural stability of porous low dielectric constant materials (PLK) under thermal and mechanical load and the influence of contributing factors including porosity as intrinsic factor and ... -
Magnetic-plasmonic Multilayered Nanorods
(Materials Science & Engineering, 2015)Multilayered nanorods which consist of alternating magnetic layers separated by Au layers combine two distinctive properties, magnetic properties and surface plasmonic resonance (SPR) properties into one nano-entity. Their ... -
Mechanical Reliability Of Porous Low-k Dielectrics For Advanced Interconnect: Study Of The Instability Mechanisms In Porous Low-k Dielectrics And Their Mediation Through Inert Plasma Induced Re-polymerization Of The Backbone Structure
(Materials Science & Engineering, 2015)Continuous scaling down of critical dimensions in interconnect structures requires the use of ultralow dielectric constant (k) films as interlayer dielectrics to reduce resistance-capacitance delays. Porous carbon-doped ... -
MECHANISM OF WEAR AND TRIBOFILM FORMATION WITH IONIC LIQUIDS AND ASHLESS ANTIWEAR ADDITIVES
(2016-07-26)Increasingly stringent government regulation on emissions (EPA Emissions Standard Reference Guide and latest CAFE standards requiring an average fuel economy of 54.5 mpg (combined cars and trucks) by 2025) impose significant ... -
METAL NANODENDRITES AND THEIR APPLICATIONS AS 3D SURFACE ENHANCED SCATTERING (SERS) SUBSTRATES
(2021-05-26)Ultrasensitive detection of chemicals and biological analytes has been a focus of a lot of studies in the recent years. In this search for the versatile detection technique, Surface Enhanced Raman Spectroscopy (SERS) has ...