School of Physics: Recent submissions
Now showing items 261-280 of 2200
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Characterisation and Manipulation of Transition Metal Dichalcogenides via Atomic Force Microscopy
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Scanning probe microscopy (SPM) has revolutionised nanotechnology and allowed the study and manipulation of materials at the nanoscale, making it ideal for the study of solid-state physics and semiconductor technologies. ... -
Atomistic simulations of surface reactions in ultra-high-temperature ceramics: O2, H2O and CO adsorption and dissociation on ZrB2 (0001) surfaces
(2021)Understanding surface reactivity is crucial in many fields, going from heterogeneous catalysis to materials oxidation and corrosion. In order to better decipher the initial stage of surface reactions of ZrB2 exposed to ... -
Effect of a ferromagnetic STM cobalt tip on a single Co-phthalocyanine molecule adsorbed on a ferromagnetic substrate
(2021)The effect of a ferromagnetic scanning tunneling microscope (STM) cobalt tip on the electronic, magnetic and electronic transport properties of a Co-phthalocyanine (CoPc)/Co(111) junction has been investigated in the ... -
The nanoscale structure of the Pt-water double layer under bias revealed
(2021)Atomistic mass and charge distribution at electrified interfaces play a key role in electrochemical phenomena of huge technological relevance for energy production and conversion. However, in spite of its importance, the ... -
Complex band structure with non-orthogonal basis set: analytical properties and implementation in the SIESTA code
(2022)The complex band structure (CBS), although not directly observable, determines many properties of a material where the periodicity is broken, such at surfaces, interfaces and defects. Furthermore, its knowledge helps in ... -
Data-driven enhancement of cubic phase stability in mixed-cation perovskites
(2021)Mixing cations has been a successful strategy in perovskite synthesis by solution-processing, delivering improvements in the thermodynamic stability as well as in the lattice parameter control. Unfortunately, the relation ... -
Measuring Dynamic Structural Changes of Nanoparticles at the Atomic Scale Using Scanning Transmission Electron Microscopy
(2020)We propose a new method to measure atomic scale dynamics of nanoparticles from experimental high-resolution annular dark field scanning transmission electron microscopy images. By using the so-called hidden Markov model, ... -
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 ... -
Increasing Spatial Fidelity and SNR of 4D-STEM using Multi-frame Data Fusion
(2021)4D-STEM, in which the 2D diffraction plane is captured for each 2D scan position in the scanning transmission electron microscope (STEM) using a pixelated detector, is complementing, and increasingly replacing existing ... -
Development of a Practicable Digital Pulse Read-Out for Dark-Field STEM
(2021)When characterising beam-sensitive materials in the scanning transmission electron microscope (STEM), low- dose techniques are essential for the reliable observation of samples in their true state. A simple route to minimise ... -
Unlocking the Origin of Compositional Fluctuations in InGaN Light Emitting Diodes
(2021)The accurate determination of compositional fluctuations is pivotal in understanding their role in the reduction of efficiency in high indium content InxGa1–xN light emitting diodes (LEDs), the origin of which is still ... -
Towards data-driven next-generation transmission electron microscopy
(2020)Electron microscopy touches on nearly every aspect of modern life, underpinning materials development for quantum computing, energy and medicine. We discuss the open, highly integrated and data-driven microscopy architecture ... -
Using Your Beam Efficiently: Reducing Electron Dose in the STEM via Flyback Compensation
(2022)In the scanning transmission electron microscope, fast-scanning and frame-averaging are two widely used approaches for reducing electron-beam damage and increasing image signal noise ratio which require no additional ... -
Cost & Capability Compromises in STEM Instrumentation for Low-Voltage Imaging
(2022)When characterising beam-sensitive materials in the scanning transmission electron microscope (STEM), low- dose techniques are essential for the reliable observation of samples in their true state. A simple route to minimise ... -
Description of the buckling of a chain of hard spheres in terms of Jacobi functions
(2022)A linear chain of hard spheres, confined by a transverse harmonic potential, buckles under compression between two hard walls. Jacobi functions provide exact analytic solutions of a differential equation (related to the ... -
The Effects of Rotation on the Evolution of the First Stars in the Universe
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Understanding the nature of the first stars is key to understanding the early Universe. With new facilities such as the James Webb Space Telescope we may soon have the first observations of the earliest stellar populations, ... -
Nanodomain structure of single crystalline nickel oxide
(2021)In this work we present a comprehensive study of the domain structure of a nickel oxide single crystal grown by floating zone melting and suggest a correlation between point defects and the observed domain structure. The ... -
The influence of drinking water constituents on the level of microplastic release from plastic kettles
(2022)Microplastic (MP) release from household plastic products has become a global concern due to the high recorded levels of microplastic and the direct risk of human exposure. However, the most widely used MP measurement ... -
Cyclic production of biocompatible few-layer graphene ink with in-line shear-mixing for inkjet-printed electrodes and Li-ion energy storage
(2022)The scalable production of two-dimensional (2D) materials is needed to accelerate their adoption to industry. In this work, we present a low-cost in-line and enclosed process of exfoliation based on high-shear mixing to ... -
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 ...
