Browsing School of Physics by Title
Now showing items 954-973 of 2103
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Kinematic properties of globally-propagating waves in the solar corona
(Trinity College (Dublin, Ireland). School of Physics, 2012)Globally-propagating bright fronts in the solar corona are a poorly understood phenomena despite almost 15 years of research. Here, the kinematics and morphology of these disturbances are studied using Extreme UltraViolet ... -
The kinematics of coronal mass ejections using multiscale methods
(2009)Aims. The diffuse morphology and transient nature of coronal mass ejections (CMEs) make them difficult to identify and track using traditional image processing techniques. We apply multiscale methods to enhance the visibility ... -
Kohlraush thermal relaxation in a random magnet
(American Physical Society, 1987)Specific-heat measurements on amorphous FexZr100-x (x=90 and 92) by a thermal relaxation method reveal a temperature decay of the form T(t)=T0+T exp[-(t/)] below 20 K, where the alloys are asperomagnetically ordered. 0.5 ... -
Label-free screening of biochemical changes in macrophage-like cells following MoS2 exposure using Raman micro-spectroscopy
(2021)The emergence of large scale production techniques for 2D particulate materials has dramatically increased their applications potential. Understanding the interactions of biological cells with such particulate material is ... -
Langmuir probe characterization of laser ablation plasmas
(Elsevier, 2009)For laser ablation plumes that are significantly ionized, Langmuir probes have proved to be a useful tool for measuring the plume shape, ion energy distribution, and electron temperature. Typically in laser ablation plasmas ... -
Langmuir probe measurements and mass spectrometry of plasma plumes generated by laser ablation of La0.4Ca0.6MnO3
(2014)The plasma formed in vacuum by UV nanosecond laser ablation of La0.4Ca0.6MnO3 in the fluence range of 0.8 to 1.9 J cm−2 using both Langmuir probe analysis and energy-resolved mass spectrometry has been studied. Mass ... -
Large Energy Transfer Distance to a plane of Gold Nanoparticles
(2012)The quenching of emission in proximity to metallic surfaces via non-radiative energy transfer is studied for sensing applications. It can also be used for the measurement of distances on the nanoscale. We report on energy ... -
Large infrared nonlinear optical response of C60.
(1991)C60 buckminsterfullerene exhibits a large ultrafast third-order nonlinear optical response. Degenerate four-wave-mixing measurements in C60-benzene solutions were performed using 50-psec pulses at l.064Itm.The magnitude ... -
Large magnetorefractive effect in magnetite
(2010)We carried out a magneto-optical spectroscopic study of magnetite (Fe3O4) thin films and single crystals at optical wavelengths. We observed a relevant quadratic magneto-optic contribution that can be notably larger than ... -
Large magnetoresistance in few layer graphene stacks with current perpendicular to plane geometry
(2012)Large magnetoresistance (MR) effect of few layers graphene between two non-magnetic metal electrodes with current perpendicular to graphene plane was studied. A non-saturation and anisotropic MR with the value over 60% at ... -
Large positive in-plane magnetoresistance induced by localized states at nanodomain boundaries in graphene
(2017)Graphene supports long spin lifetimes and long diffusion lengths at room temperature, making it highly promising for spintronics. However, making graphene magnetic remains a principal challenge despite the many proposed ... -
Large Reversible Plasmon Shift with Au Nanodisc Dimers on Thin film VO2
(2022)By coupling Au dimer nanostructures to an underlying thin film of phase change material, vanadium dioxide, significant shifts in the plasmonic scattering spectra are observed, allowing for dynamic tuning within the visible ... -
Large variations in both dark- and photoconductivity in nanosheet networks as nanomaterial is varied from MoS2 to WTe2
(2015)We have used solution processing techniques to fabricate thin-film networks of nanosheets of six different transition metal dichalcogenides; MoS2, MoSe2, MoTe2, WS2, WSe2 and WTe2. We have measured both the dark conductivity ... -
Large-scale Bright Fronts in the Solar Corona: A Review of "EIT waves"
(2010)?EIT waves? are large-scale coronal bright fronts (CBFs) that were first observed in 195 ? images obtained using the Extreme-ultraviolet Imaging Telescope (EIT) onboard the Solar and Heliospheric Observatory (SOHO). Commonly ... -
Large-Scale Exfoliation of Inorganic Layered Compounds in Aqueous Surfactant Solutions
(2011)Thumbnail image of graphical abstract A method to exfoliate MoS2 in large quantities in surfactant-water solutions is described. The layered material tends to be exfoliated as dispersions of thin, relatively defect-free ... -
Large-scale mechanical peeling of boron nitride nanosheets by low-energy ball milling
(2011)Mechanical cleavage by Scotch tape was the first method to produce graphene and is still widely used in laboratories. However, a critical problem of this method is the extremely low yield. We have tailored ball milling ... -
Large-scale production of size-controlled MoS2 nanosheets by shear exfoliation
(2015)In order to fulfil their potential for applications, it will be necessary to develop large-scale production methods for two-dimensional (2D) inorganic nanosheets. Here we demonstrate the large-scale shear-exfoliation of ... -
Laser triggered Z-pinch broadband extreme ultraviolet source for metrology
(2013)We compare the extreme ultraviolet emission characteristics of tin and galinstan (atomic %: Ga: 78.35, In: 14.93, Sn: 6.72) between 10 nm and 18 nm in a laser-triggered discharge between liquid metal-coated electrodes. ... -
Laser-induced failure modes in plasmonic thin films
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)In order for the areal density of magnetic hard-drives to continue increasing, it is necessary to improve upon current recording technologies. The proposed next-generation magnetic recording process, heat-assisted magnetic ... -
Lateral Size Selection of Surfactant-Stabilised Graphene Flakes using Size Exclusion Chromatography
(2012)Aqueous dispersions of graphene, stabilised by a surfactant, have been separated according to lateral flake size using size exclusion chromatography. Transition electron microscopy was used to characterise the flake size ...
