Browsing School of Physics by Title
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Fabrication and characterisation of chemical vapour deposition grown branched carbon nanotube arrays
(Trinity College (Dublin, Ireland). School of Physics, 2007)The fabrication, optimisation and characterisation of arrays of straight and junction multiwall carbon nanotubes (MWNTs) is presented in this thesis. A detailed description of the design and fabrication of the chemical ... -
Fabrication of magnetic force microscopy tips by electrodeposition and focused ion beam milling
(IEEE, 2008)A method is described for the fabrication of magnetic force microscopy tips via localized electrodeposition and focused ion beam milling departing from commercial tapping mode tips. Very high aspect ratios and interacting ... -
Fabrication, characterisation and applications of some organic, inorganic and organic-inorganic hybrid nanostructures
(Trinity College (Dublin, Ireland). School of Physics, 2009)This thesis describes the fabrication, characterisation and applications of some interesting one-dimensional and two-dimensional nanostructures. The bulk of the thesis is concerned with the deposition of metals, polymers, ... -
A facetless laser suitable for monolithic integration
(IEEE, 2008)A novel facetless laser structure is proposed and demonstrated. The facetless laser is realised by etching deep slots into the mirror sections of a multi section semiconductor laser which provide the feedback for laser ... -
A facile "bottom-up" approach to prepare free-standing nano-films based on manganese coordination clusters
(2013)We present herein a novel method to prepare free-standing Dried Foam Films (DFFs) whereby individual polynuclear manganese complexes cover quantitatively the holes of micro-grids; the fabricated, homogeneous films have a ... -
Factors controlling the dispersion of single walled carbon nanotubes and hexabenzocoronene in liquid media
(Trinity College (Dublin, Ireland). School of Physics, 2012)In this thesis, some of the primary factors controlling liquid phase dispersion of sp2-hybridised carbon nanostructures (namely single walled carbon nanotubes (SWNTs) and hexa-peri-hexabenzocoronene (HBC)) were investigated. -
Far ultraviolet spectroscopic explorer observations of the symbiotic star AG Draconis
(American Astronomical Society, 2005)Spectra of the bright symbiotic star AG Draconis (BD +67?922) in the wavelength range 905-1187 ? obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) are presented. The spectra show a number of narrow, nebular ... -
Far-ultraviolet observations of NGC 3516 using the Hopkins ultraviolet telescope
(American Astronomical Society, 1996)We observed the Seyfert 1 galaxy NGC 3516 twice during the flight of Astro-2 using the Hopkins Ultraviolet Telescope aboard the Space Shuttle Endeavour in March 1995. Simultaneous X-ray observations were performed with the ... -
Far-ultraviolet observations of NGC 4151 during the ORFEUS-SPAS II mission
(American Astronomical Society, 1998)We observed the Seyfert 1 galaxy NGC 4151 on 11 occasions at 1-2 day intervals using the Berkeley spectrometer during the ORFEUS-SPAS II mission in 1996 November. The mean spectrum covers 912-1220 A at ~0.3 A resolution ... -
Far-ultraviolet spectra of broad absorption line QSOs and constraints on models for the ionization structure and metallicity of the BAL-region gas
(American Astronomical Society, 1996)Hubble Space Telescope Faint Object Spectrograph G270H spectra of four moderate-to high-redshift broad absorption line (BAL) QSOs are presented. In addition, evidence is discussed that indicates that the gas that gives ... -
The far-ultraviolet spectrum of NGC 4151 as observed with the Hopkins ultraviolet telescope on Astro-2
(American Astronomical Society, 1995)We observed NGC 4151 on six separate occasions at intervals of 1 to 3 days using the Hopkins Ultraviolet Telescope during the flight of Astro-2 aboard the space shuttle Endeavour in 1995 March. The far-UV spectra cover the ... -
Far-UV Emissions of the Sun in Time: Probing Solar Magnetic Activity and Effects on Evolution of Paleo-Planetary Atmospheres
(American Astronomical Society, 2003)We present and analyze Far Ultraviolet Spectroscopic Explorer (FUSE) observations of six solar analogs. These are single, main-sequenceG0?5 stars selected as proxies for the Sun at several stages of its main-sequence ... -
Fast ab initio methods for the calculation of adiabatic spin wave spectra in complex systems
(American Physical Society, 2001)The interpretation of the physics of magnets with reduced dimensionality often requires information on the spin wave excitations at arbitrary wavelengths which is generally hard to obtain experimentally. Two powerful methods ... -
Fast automated mineral differentiation using optical hyperspectral imaging
(Trinity College Dublin. School of Physics. Discipline of Physics, 2024)The processing of mineral-bearing rocks in the mining industry is a highly energy and resource-intensive process. This has motivated the development of more effective ways to automatically sort valuable ore from barren ... -
Fe Nanoclusters on the Ge(001) Surface Studied by Scanning Tunnelling Microscopy, Density Functional Theory Calculations and X-Ray Magnetic Circular Dichroism
(2011)The growth of Fe nanoclusters on the Ge(001) surface has been studied using low-temperature scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. STM results indicate that Fe nucleates on ... -
Fe- and Co-based magnetic tunnel junctions with AlN and ZnO spacers
(2022)AlN and ZnO, two wide band-gap semiconductors extensively used in the display industry, crystallize in the wurtzite structure, which can favor the formation of epitaxial interfaces to close-packed common ferromagnets. Here ... -
Feature issue introduction: nanocarbon for photonics and optoelectronics
(Optical Society of America, 2012)Nanocarbons possess a variety of nearly ideal, low-dimensional nanostructures that cause them to attain unique electronic and optical properties. Recent linear and nonlinear spectroscopic and optoelectronic results prove ... -
Femtosecond laser ablation of metals
(Trinity College (Dublin, Ireland). School of Physics, 2015)Femtosecond laser ablation of metals and dielectrics is currently very topical due to its new and distinctive ablation process and the growing number of applications. The ablation process is rather complex and results in ... -
Femtosecond ultraviolet laser ablation of silver and comparison with nanosecond ablation
(2013)The ablation plume dynamics arising from ablation of silver with a 500 fs, 248nm laser at 2Jcm 2 has been studied using angle-resolved Langmuir ion probe and thin film deposition techniques. For the same laser fluence, ...
