Physics (Scholarly Publications): Recent submissions
Now showing items 261-280 of 1742
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Atomic and Electronic Structure of a Multidomain GeTe Crystal
(2020)Renewed interest in the ferroelectric semiconductor germanium telluride was recently triggered by the direct observation of a giant Rashba effect and a 30-year-old dream about a functional spin field-effect transistor. In ... -
Revealing electromigration on dielectrics and metals through the step-bunching instability
(2020)Electromigration, due to its technological and scientific significance, has been a subject of extensive studies for many years. We present evidence of electromigration in dielectric materials, namely C-plane sapphire, ... -
Efficient Resistive Switching and Spike Rate Dependent Plasticity in a New CuCrO2 Memristor for Plausible Neuromorphic Systems
(2020)In this work, we introduce a new class of p-type transparent conductive oxide (TCO) CuCrO2 (150 nm) heterogeneously integrated onto FTO/glass for forming free memristor based neuromorphic applications. The fabricated ... -
Constructive and destructive interference of Kerker-type scattering in an ultrathin silicon Huygens metasurface
(2020)High refractive index dielectric nanoparticles have provided a new platform for exotic light manipulation through the interference of multipole modes. The Kerker effect is one example of a Huygens source design. Rather ... -
Magnetoresistance of Nanoscale Domain Walls Formed in Arrays of Parallel Nanowires
(2019)We present the possibility of enhancing magnetoresistance by controlling nanoscale domain wall (DW) width in a planar nanowire array. Results based on the micromagnetic calculations show that DW width decreases with ... -
Structural, optical, and electrical properties of silver gratings prepared by nanoimprint lithography of nanoparticle ink
(2021)A facile method for fabrication of silver gratings using silver nanoparticle ink and nanoimprint lithography is investigated. The properties of silver nanoparticle ink grating and planar samples, with and without a PMMA ... -
Influence of Gold Nano-Bipyramid Dimensions on Strong Coupling with Excitons of Monolayer MoS2
(2020)Rabi splitting between the longitudinal plasmon of a gold nano-bipyramid and the A exciton of monolayer MoS2 is observed at room temperature. The dependence of the Rabi splitting on the physical dimensions of the nano-bipyramid ... -
Electronic and structural characterisation of polycrystalline platinum disulfide thin films
(2020)We employ a combination of scanning tunnelling microscopy (STM) and scanning tunnelling spectroscopy (STS) to investigate the properties of layered PtS2, synthesised via thermally assisted conversion (TAC) of a metallic ... -
Electronic Polarizability as the Fundamental Variable in the Dielectric Properties of Two-Dimensional Materials
(2020)The dielectric constant, which defines the polarization of the media, is a key quantity in condensed matter. It determines several electronic and optoelectronic properties important for a plethora of modern technologies ... -
Mechanochromic and Thermochromic Sensors Based on Graphene Infused Polymer Opals
(2020)High quality opal-like photonic crystals containing graphene are fabricated using evaporation-driven self-assembly of soft polymer colloids. A miniscule amount of pristine graphene within a colloidal crystal lattice ... -
High charge and discharge rate limitations in ordered macroporous li-ion battery materials
(2020)Adding porosity to battery electrodes is sometimes useful for accommodating volumetric expansion, electrolyte access to active materials, or mitigating poor high-rate performance for thicker electrodes. Ordered macroporous ... -
Low cost, high performance ultrafiltration membranes from glass fiber-PTFE–graphene composites
(2020)The development of low-cost ultrafiltration membranes with relatively high flow rate and selectivity is an important goal which could improve access to clean water in the developing world. Here we demonstrate a method to ... -
In vitro localisation and degradation of few-layer MoS2 submicrometric plates in human macrophage-like cells: a label free Raman micro-spectroscopic study
(2020)Monitoring the uptake, micro-environment and fate of micro or nano scaled particulate materials in cells is of paramount importance for the emerging fields of toxicology and medicine. Such particulate materials are known ... -
High Performance Na-O2 Batteries and Printed Microsupercapacitors Based on Water-Processable, Biomolecule-Assisted Anodic Graphene
(2020)Integrated approaches that expedite the production and processing of graphene into useful structures and devices, particularly through simple and environmentally friendly strategies, are highly desirable in the efforts to ... -
Selective electrochemical production of hydrogen peroxide at zigzag edges of exfoliated molybdenum telluride nanoflakes
(2020)The two-electron reduction of molecular oxygen represents an effective strategy to enable the green, mild and on-demand synthesis of hydrogen peroxide. Its practical viability, however, hinges on the development of advanced ... -
Mortality: a physics perspective
(2021)One of the many interests of the late Dietrich Stauffer was the modelling of mortality. Here we review the features of mortality data for various biological species. Age specific mortality (death rate) leads to a discussion ... -
Physical models of infant mortality: implications for defects in biological systems
(2020)Reliability engineering concerned with failure of technical inanimate systems usually uses the vocabulary and notions of human mortality, e.g., infant mortality vs. senescence mortality. Yet, few data are available to ... -
Weyl points and exceptional rings with polaritons in bulk semiconductors
(2020)Weyl points are the simplest topologically protected degeneracy in a three-dimensional dispersion relation. The realization of Weyl semimetals in photonic crystals has allowed these singularities and their consequences to ... -
Perceptions of light pollution and its impacts: Results of an Irish citizen science survey
(2020)Background: Light pollution is increasingly an area of concern for health and quality of life research. Somewhat surprisingly, there are relatively few descriptions of perceptions of light pollution in the literature. The ... -
Mechanisms of Liquid Phase Exfoliation for the Production of Graphene
(2020)Liquid- phase exfoliation (LPE) is the principal method of producing two-dimensional (2D) materials such as graphene in large quantities with a good balance between quality and cost and is now widely adopted by both the ...
