Browsing Department of Physics by Title
Now showing items 118-137 of 197
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Observation and analysis of unexplored low-energy electron emission processes revealed using a low-energy positron beam
(2020-08-17)This dissertation presents measurements of the kinetic energy distributions of low-energy, positron-induced electrons emitted from single-layer of graphene (SLG), highly oriented pyrolytic graphite (HOPG), Si, Cu and TiO2 ... -
Observation of L1[subscript]0-like chemical ordering in a decahedral FePt nanoparticle by C[subscript]s-corrected high resolution transmission electron microscopy
(American Institute of PhysicsDepartment of Physics, The University of Texas at Arlington, 2009-03-09)The state of the chemical ordering in a decahedral FePt nanoparticle was studied using aberration corrected high resolution transmission electron microscopy. With the reduced image delocalization effect as a result of ... -
On A Class Of ABCS
(Physics, 2007-08-23)The local density approximation to density functional theory (LDA-DFT) has been used to study the different possible relaxations and reconstructions of In-rich InSb (100) surface. Various electronic and geometric structure ... -
On The Behavior Of The 5f Electrons
(Physics, 2007-08-23)Considerable theoretical efforts have been devoted in recent years to studying the electronic and geometric structures and related properties of surfaces to high accuracy. One of the many motivations for this burgeoning ... -
On The Electronic And Geometric Structure Properties Of Silicon-germanium Nanoclusters: A Hybrid Density Functional Theoretic Study
(Physics, 2012-04-11)Hybrid density functional theory has been used to study the electronic and geometric structure properties of silicon-germanium nanoclusters containing up to eight atoms. The hybrid functional used is Becke's three-parameter ... -
On The Existence And Stability Of Carbon -based Silicon Fullerenes -a Density Functional Theoretic Study
(Physics, 2007-08-23)The electronic and geometric properties of silicon-carbon fullerene-like nanostructures with two, four, six, twenty and twenty four carbon atoms on the surface of the Si60 cages by substitution, as well as inside the cage ... -
Optical And Structural Properties Of Zinc Based Nanoparticles Depend On Temperature And Molar Concentration
(Physics, 2009-09-16)Zinc based nanoparticles have great potential for use in radiation detection as well as uses in solid state lighting. In this thesis, we report the synthesis of ZnO: Eu3+ with the use of solid state diffusion at temperatures ... -
Optimization Of Energy Resolution In The Digital Hadron Calorimeter Using Longitudinal Weights
(Physics, 2013-07-22)Particle physics seeks to describe matter in its most elementary structure. With lepton colliders; couplings of gauge bosons and heavy quarks, physics beyond the Standard Model, and properties of a recently discovered Higgs ... -
Orbital Evolution Studies and Radio Searches of Extra-Solar Moons
(2021-12-13)Exoplanetary research has undergone a great deal of development and growth. Achievements in theoretical studies and detection techniques have led to the discovery of 4,000+ exoplanets in ~3, 000 planetary systems to date. ... -
Orbital Stability Analysis And Chaotic Dynamics Of Exoplanets In Multi-stellar Systems
(Physics, 2014-12)The advancement in detection technology has substantially increased the discovery rate of exoplanets in the last two decades. The confirmation of thousands of exoplanets orbiting the solar type stars has raised new ... -
Phase Transformation and Magnetic Hardening in Isolated FePt Nanoparticles
(IEEEDepartment of Physics, The University of Texas at Arlington, 2009-03-31)Isolated monodisperse L1[subscript]0 FePt nanoparticles coated by carbon were obtained by adding enough surfactants that decomposed into carbon after the chemical synthesis and postannealing of the A1 FePt nanoparticles. ... -
Phase Transformation and Magnetic Hardening in Isolated FePt Nanoparticles
(IEEE XploreIEEEDepartment of Physics, The University of Texas at Arlington, 2009-07)Isolated monodisperseL10 FePt nanoparticles coated by carbon were obtained by adding enough surfactants that decomposed into carbon after the chemical synthesis and postannealing of the A1 FePt nanoparticles. The effect ... -
Phenomenological Studies Of Dark Matter
(Physics, 2014-07-14)It is common knowledge that eighty percent of the matter in our Universe consists of a mysterious substance called ``dark matter'' (DM) which has only been detected through its gravitational interactions. The ``Standard ... -
Physics Of Luminescence Nanomaterials
(Physics, 2011-03-03)Luminescence oxide nanoparticles have tremendous potential in revolutionizing many interesting applications in today's emerging cutting-edge optical technology such as solid state lighting, biomedical labeling, imaging, ... -
PLASMA-BASED SYNTHESIS OF NANOSTRUCTURED MATERIALS AND THEIR CHARACTERIZATION
(2017-05-02)The aim of this thesis is to explore the novel cost-effective synthesis technique to develop nanostructured materials and investigate their structural and magnetic properties. Nanomaterials were synthesized by a plasma ... -
Plasmonic Nanostructures: Fabrication And Optical Characterization
(Physics, 2008-09-17)Resonant light localization by metal nanostructures has potential for applications in cavity quantum electrodynamics (e.g. single-photon sources, quantum gates etc) and nonlinear optics. In this thesis we present the ... -
Precision Higgs Coupling Measurements In H→ww*→lνlν Final State With The Atlas Detector At The Lhc
The Standard Model (SM) is a gauge theory that describes the fundamental particles of matter and the forces between these particles. It has been tested to a very high precision in the past several decades, except for ... -
Predicting A New Quaternary Photocatalyst Suitable For PEC Process To Produce Hydrogen And Determnation of Its Structural, Electronics, And Optical Properties Using Density Functional Theory
(Physics, 2013-07-22)Our present work represents a comprehensive theoretical and computational research in quest for predicting new photocatalysts suitable for photoelectrochemical process (PEC) to produce hydrogen by splitting water. We predict ... -
PREDICTING STABLE CRYSTAL STRUCTURES AND THEIR ELECTRONIC PROPERTIES OF Si-RICH SILICON CARBIDE BY FIRST PRINCIPLE CALCULATION
(2017-06-08)Silicon carbide has become an attractive semiconductor material with its high stability. It has been used in variety of fundamental aspects and applications such as photovoltaic solar cells due to its unique properties, ... -
Preparation And Characterization Of Hard Magnetic Nanoparticles
(Physics, 2007-08-23)Hard-magnetic nanoparticles with uniform size distribution have attracted huge attention in the past several years because of their unique magnetic properties and potential for many applications such as high density recording ...