Browsing Physics (Theses and Dissertations) by Title
Now showing items 226-245 of 410
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Nanofabrication and electronic transport properties of silicon nanowires
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)This project develops a robust and reliable process to pattern sub 20 nm features in negative tone Hydrogen Silsesquioxane (HSQ) resist using high-resolution Electron Beam Lithography (EBL) and a low damage reactive ion ... -
Nanomechanical forming studies of thin polymer films
(Trinity College (Dublin, Ireland). School of Physics, 2008)Nanoimprint is a technique that involves mechanical patterning using a rigid patterned stamp on a deformable thin film to produce nanostructures. It is also a technique that is the focus of much research because of the ... -
Nanomechanical Label Free Micro RNA Detection For Cancer And Liver Injury Diagnosis
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)A biosensor is a device in which a biological component is coupled to a transducer which converts a biological recognition event into a detectable signal. Microribonucleic acid (miRNA, microRNA) are non protein coding ... -
Nanomechanical resonators for clinical coagulation diagnostics and malaria vaccine candidates analysis
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)The development of a microcantilevers-based (MC-based) clinical diagnostic instrument that employs the dynamic mode of operation (microresonators) is presented. The device exploits microresonator arrays that are actively ... -
Nanopatterning magnetic materials - Cr/Mo(110) epitaxial system and Fe3O4(111) surface
(Trinity College (Dublin, Ireland). School of Physics, 2006)This thesis presents the investigation of the Cr/Mo(110) epitaxial interface. The study combines experimental techniques in the form of scanning tunneling microscopy (STM), low energy electron diffraction (LEED), and Auger ... -
Nanoscale effects governing mechanical reinforcement in composite materials
(Trinity College (Dublin, Ireland). School of Physics, 2013)Nanoscale materials have been studied extensively in the scientific research community in recent years. Due to their impressive mechanical properties, one- and two- dimensional nanomaterials have become candidates as ... -
Nanostructured Electrodes as Catalysts for the Water Splitting Reaction
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)The production of hydrogen through the electrochemical water splitting reaction is an attractive energy storage solution for intermittent natural resources. This comprises of the hydrogen evolution reaction (HER) at the ... -
NANOTECHNOLOGICAL CANTILEVER-BASED ANALYSIS OF INFECTIOUS DISEASE BIOMARKERS
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Our history is pin-pointed with several events when a viral, parasite or bacterial pathogen disrupted its boundaries and influenced human culture and behaviour, shaping human past and present times. The continuous appearance ... -
Near electrode effects in magneto-electrochemistry
(Trinity College (Dublin, Ireland). School of Physics, 2011)Magnetic fields imposed on electrochemical cells have been shown to have dramatic effects on electrodeposits ranging from surface morphology, crystal structure, deposition rate, alloy composition and magnetic properties. ... -
Near-infrared luminescent polymer amplifiers and microlasers
(Trinity College (Dublin, Ireland). School of Physics, 2008)Near-infrared optical gain in luminescent polymeric slab asymmetric waveguides has been investigated by use of amplified spontaneous emission. Upon nanosecond photopumping, the waveguides have shown a small-signal gain ... -
New conjugated polymers : Synthesis, characterisation and applications
(Trinity College (Dublin, Ireland). School of Physics, 2000)A series of conjugated polymers related to poly (phenylenevinylene) have been synthesised and characterised. These polymers contain various substitution patterns. Octyloxy side-chains were attached to the arylene units of ... -
New materials for spin electronics
(Trinity College (Dublin, Ireland). School of Physics, 2015)Magnetic components are currently widely used in electronic devices, especially in the field of data storage. The need for downscaling the lateral dimensions of every component following Moore's law brings new challenges ... -
New Methods of Studying Young Stellar Objects Using Radio Interferometry
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)While most studies of star formation are based on infrared or optical observations, radio astronomy has also proven very useful in the study of this process. This is seen for example in the detection of free-free emission ... -
New Technologies for Ultra-low Dose-rate Imaging in the STEM
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)Electron microscopy arose from the need to image materials beyond the resolution optical microscopes could achieve. Though taking many years and technological advancements, the modern scanning transmission electron microscope ... -
Noise controlled semiconductor optical amplifiers
(Trinity College (Dublin, Ireland). School of Physics, 2012)Semiconductor optical amplifiers (SOA) have been widely used in communications systems for decades, in a multitude of capacities. In their simplest form SOAs offer cost effective linear amplification at a variety of ... -
Non-equilibrium transport properties of quasiperiodic models
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)The advances in the manipulation of ultracold atoms trapped by optical lattices has established this set-up as a promising analogue simulator of quantum Hamiltonians. The extended coherence times allow for the monitoring ... -
Nonlinear optical extinction in organic and inorganic nanomaterials
(Trinity College (Dublin, Ireland). School of Physics, 2007)This thesis will focus on the nonlinear optical dissipation of high intensity nanosecond laser irradiation by polymer-phthalocyanine films and nano-structured dispersions. The nonlinear optical investigation of a selection ... -
Nonlinear optical extinction in polymer-carbon nanotube and phthalocyanine systems
(Trinity College (Dublin, Ireland). School of Physics, 2003)The work presented in this thesis is based on experimental measurements of nonlinear optical extinction or optical limiting of nanosecond laser pulses by phthalocyanine and polymer-carbon nanotube systems. The nonlinear ... -
Novel Characterisation and Modelling Techniques for Spintronic Materials
(Trinity College Dublin. School of Physics. Discipline of Physics, 2024)Spintronic materials have the potential to revolutionise certain aspects of information technology. An ideal material for spintronics is a zero-moment half-metal (ZMHM), which exhibits no stray magnetic field but simultaneously ... -
Novel Instrumentation for High Frequency Electrical Conductivity and Magnetisation Dynamics Characterisation
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)The drive toward smaller devices and faster operational speeds places a challenge on techniques for probing electrical conductivity and magnetisation dynamics. This thesis attempts to address this challenge by developing ...
