Browsing School of Physics by Title
Now showing items 1535-1554 of 2105
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Probing thermal expansion coefficients of monolayers using surface enhanced Raman scattering
(2016)Monolayer transition metal dichalcogenides exhibit remarkable electronic and optical properties, making them candidates for application within flexible nano-optoelectronics, however direct experimental determination of ... -
Procedure for 3D atomic resolution reconstructions using atom-counting and a Bayesian genetic algorithm
(2021)We introduce a Bayesian genetic algorithm for reconstructing atomic models of nanoparticles from a single projection using Z-contrast imaging. The number of atoms in a projected atomic column obtained from annular dark ... -
Production and processing of graphene and related materials
(IOP Publishing, 2020)We present an overview of the main techniques for production and processing of graphene and related materials (GRMs), as well as the key characterization procedures. We adopt a ‘hands-on’ approach, providing practical ... -
Production of Molybdenum Trioxide Nanosheets by Liquid Exfoliation and Their Application in High-Performance Supercapacitors
(2014)Here, we demonstrate a simple method to exfoliate layered molybdenum trioxide (MoO3) crystallites to give multilayer MoO3 nanosheets dispersed in solvents. Exfoliation is achieved by sonicating MoO3 powder in the presence ... -
Production of Ni(OH)<inf>2</inf> nanosheets by liquid phase exfoliation: From optical properties to electrochemical applications
(2016)Here we demonstrate that liquid phase exfoliation can be used to convert layered crystals of nickel hydroxide into Ni(OH)2 nanosheets in relatively large quantities and without the need for ion intercalation. While other ... -
Production of Quasi-2D Platelets of Non-Layered Iron Pyrite (FeS2) by Liquid-Phase Exfoliation for High Performance Battery Electrodes
(2020)Over the last fifteen years, two-dimensional (2D) materials have been studied and exploited for many applications. In many cases, 2D materials are formed by the exfoliation of layered crystals such as transition-metal ... -
Progress towards spin-polarized scanning tunneling microscopy
(1992)Solutions to the main problems in operating a spin?polarized scanning tunneling microscope are discussed. Preliminary experimental results obtained in the course of implementing these solutions are reported. Atomic resolution ... -
Propagation of coronal mass ejections in the inner heliosphere
(Trinity College (Dublin, Ireland). School of Physics, 2011)Solar Coronal mass ejections (CMEs) are large-scale ejections of plasma and magnetic field from the corona, which propagate through interplanetary space. CMEs are the most significant drivers of adverse space weather on ... -
Properties of lightweight fibrous materials made using a foam-forming technique
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)This thesis concerns the production and characterisation of foam-formed fibrous materials made from wood, peat fibres and spent grain. Such materials might find commercial applications for insulating purposes when produced ... -
Properties of lightweight fibrous structures made by a novel foam forming technique
(2019)We describe a novel method for the production of lightweight fibrous structures of densities as low as 8.8 kg m−3 . The method is based on the use of liquid foam as a carrier medium for dispersed Kraft fibres. Different ... -
Properties of massive stars before death
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)Despite their importance, there is a lot yet to be learned regarding massive stars, particularly those at late evolutionary stages. In the first of two studies presented here, we investigate a suspected very massive star ... -
Prospect for detecting magnetism of a single impurity atom using electron magnetic chiral dichroism
(American Physical Society, 2019)Dopants, even single atoms, can influence the electrical and magnetic properties of materials. Here we demonstrate the opportunity for detecting the magnetic response of an embedded magnetic impurity in a nonmagnetic host ... -
Protocol for classical molecular dynamics simulations of nano-junctions in solution
(2012)Modeling of nanoscale electronic devices in water requires the evaluation of the transport properties averaged over the possible configurations of the solvent. They can be obtained from classical molecular dynamics for ... -
Proximity influence of a ferromagnet on the magnetoresistance of Cr film across a nonmagnetic layer
(2004)(5 nm) Cr (100)/( x nm) MgO (100)/(30 nm) Fe3O4 (100) (1 < x < 6 nm), as well as (5 nm) Cr (100)/(5 nm) MgO (10 0) structures were grown on MgO (10 0) substrates using molecular beam epitaxy. The proximity influence of the ... -
Proximity-induced topological state in graphene
(2014)The appearance of topologically protected states at the surface of an ordinary insulator is a rare occurrence and to date only a handful of materials are known for having this property. An intriguing question concerns the ... -
Public Lighting Recommendations
(Dark Sky Ireland, 2019)Public lighting accounts for €56 million in public expenditure annually and is a major item in council budgets. A large proportion of the 480,000 units in the lighting stock are in need of replacement with more efficient ... -
Pulse formation and dynamics in self-pulsating semiconductor laser diodes
(Trinity College (Dublin, Ireland). School of Physics, 2000)Self-pulsating lasers emitting at 800 nm are used in compact disc (CD) players because their low coherence makes them relatively insensitive to optical feedback. The ever increasing demand for higher capacity storage on ... -
Pulsed laser ablation of silver: ion dynamics in plasma plume
(2010)The ion dynamics of silver ablated using 355 and 193nm pulsed laser irradiation in vacuum has been investigated by using a Langmuir probe and quadrupole mass spectrometry. The kinetic energies of the ablated silver ions ... -
'Pulsed X-ray shadowgraphy of dense, cool, laser-imploded plasma
(American Physical Society, 1978)Laser implosion of 87-bar neon-filled glass microballoon targets produces a dense, cool plasma whose development in time and space is recorded by pulsed-x-ray shadowgraphy with soft x rays from a separate laser-produced ...