A5076621280- Semiconductor materials and devices
- Copper Interconnects and Reliability
- ZnO doping and properties
- Electrocatalysts for Energy Conversion
- Advanced Photocatalysis Techniques
- Metal and Thin Film Mechanics
- Semiconductor materials and interfaces
- Copper-based nanomaterials and applications
- Graphene research and applications
- Advanced battery technologies research
- Electronic and Structural Properties of Oxides
- Advancements in Solid Oxide Fuel Cells
- Solar and Space Plasma Dynamics
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Quantum Dots Synthesis And Properties
- TiO2 Photocatalysis and Solar Cells
- Machine Learning in Materials Science
- Fuel Cells and Related Materials
- Analytical Chemistry and Sensors
- Electrochemical Analysis and Applications
- Characterization and Applications of Magnetic Nanoparticles
- Gas Sensing Nanomaterials and Sensors
- Ionosphere and magnetosphere dynamics
- Solid State Laser Technologies
University of Southampton
2025
University of Manchester
2019-2024
Coherent (United States)
2023-2024
Royal London Hospital
2024
University of Limerick
2016-2023
Dublin City University
1996-2019
Lawrence Berkeley National Laboratory
2018-2019
Henry Royce Institute
2019
Munster Technological University
2016
University of Idaho
2007
Rare earth oxides (REOs) are attracting attention for use as cost-effective, high-performance dropwise condensers because of their favorable thermal properties and robust nature. However, to engineer a suitable surface industrial applications, the mechanism governing wetting must be first fully elucidated. Recent studies exploring water-wetting state REOs have suggested that these intrinsically hydrophobic owing unique electronic structure lanthanide series. These claims been countered with...
We report a rapid solution-phase strategy to synthesize alloyed PtNi nanoparticles which demonstrate outstanding functionality for the oxygen reduction reaction (ORR). This one-pot co-reduction colloidal synthesis results in monodisperse population of single-crystal rhombic dodecahedral morphology, with Pt enriched edges and compositions close Pt1Ni2. use nanoscale 3D compositional analysis reveal first time that oleylamine (OAm)-aging Pt1Ni2 particles Ni leaching from surface facets,...
Conductometric gas sensors (CGS) provide a reproducible response at low cost but their operation mechanisms are still not fully understood. In this paper, we elucidate the nature of interactions between SnO2, common gas-sensitive material, and O2, ubiquitous central to detection CGS. Using synchrotron radiation, investigated working SnO2 sensor under operando conditions via near-ambient pressure (NAP) XPS with simultaneous resistance measurements, created depth profile variable near-surface...
Copper/SiO2/Si metal-oxide-semiconductor (MOS) devices both with and without a MnSiO3 barrier layer at the Cu/SiO2 interface have been fabricated in an ultrahigh vacuum X-ray photoelectron spectroscopy (XPS) system, which allows chemical characterization of formation process to be directly correlated electrical testing effectiveness. Capacitance voltage (CV) analysis, before after tube furnace anneals MOS structures showed that presence significantly improved electric stability device...
Wetting of carbon surfaces is one the most widespread, yet poorly understood, physical phenomena. Control over wetting properties underpins operation aqueous energy-storage devices and carbon-based filtration systems. Electrowetting, variation in contact angle with an applied potential, straightforward way introducing control wetting. Here, we study electrowetting directly on graphitic use electrolytes to show that reversible can be achieved quantitatively understood using models interfacial...
Scalable synthesis of 2D materials is a prerequisite for their commercial exploitation. Here, novel method producing nanocrystalline molybdenum disulfide (MoS2) at the liquid-liquid interface demonstrated by decomposing molecular precursor (tetrakis(N,N-diethyldithiocarbamato) molybdenum(IV)) in an organic solvent. The decomposition occurs over few hours room temperature without stirring or addition any surfactants, MoS2 which can be isolated onto substrates choice. formation accelerated...
Ambient pressure X-ray photoelectron spectroscopy (AP-XPS) was employed to investigate the effect of applied potential on interface TiO2(110) with 0.1 M HCl. The study, which involved operando electrochemical characterization, enabled real-time monitoring and analysis processes. There is a significant influence composition; in particular, surface Cl– coverage varies potential. Moreover, there appears be reaction evolved Cl adventitious carbon form C–Cl C–Cl2 species.
Lasing has been observed in the blue (488 nm) and red (635 nm, 717 bands a new Nd3+:Pr3+ co-doped fluorozirconate (ZBLANP) glass fiber with 796 nm pump. An upconversion resonant energy transfer mechanism is proposed to explain visible transitions.
Developing a simple, safe, and efficient route for the preparation of nanoparticulate ternary Chevrel phases MxMo6S8 (CPs; where M = metal) is great interest because their applications in energy conversion storage technologies. Currently, wide use these materials restricted by prolonged reaction time, high demands required synthesis, complexity process, ambiguity size resultant particles. Herein, we report efficient, controllable molecular precursor approach synthesis nanoscale CPs without...
The scarcity and cost of noble metals used in commercial electrolyzers limit the sustainability scalability water electrolysis for green hydrogen production. Herein, we report ultralow loading Au nanoparticles onto MoS2 electrodes by spontaneous process galvanic deposition. AuNP@MoS2 electrode synthesis was optimized, containing smallest nanoparticle diameter (2.9 nm) lowest (0.044 μg cm–2) exhibited best overall intrinsic electrocatalytic performance. This enhancement is attributed to an...
The surface treatment of ultralow-κ dielectric layers by exposure to atomic oxygen is presented as a potential mechanism modify the chemical composition facilitate copper diffusion barrier layer formation. High carbon content, low-κ films varying porosity were exposed treatments at room temperature, and x-ray photoelectron spectroscopy studies reveal both depletion incorporation surface. Subsequent dynamic water contact angle measurements show that chemically modified surfaces become more...
ZnO nanorods were grown on silicon (Si) substrates by two techniques: (i) Chemical Bath Deposition (CBD) and (ii) a CBD seed layer combined with Carbothermal Reduction Vapor Phase Transport (CTR-VPT). The structured characterized scanning electron microscopy (SEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS), contact angle measurments. photoelectrochemical property of analyzed linear voltammetry under UV-ABC light excitation. Using the nanorod samples as photoanodes, removal...
Formation of graphene nanobubbles <italic>via</italic> the intercalation small molecules, their surface-mediated decomposition and formation larger molecules.
Abstract In-situ analysis of the TiO 2 /water interface via near ambient pressure–x-ray photoelectron spectroscopy (NAP–XPS) is demonstrated in both a lab based system (NAP-cell configuration) and synchrotron endstation (backfill configuration). Ultra-thin wetting layers liquid water (∼10 nm) are formed on rutile surface with minimal contamination present addition to unique insight during growth films as indicated NAP–XPS, in-situ sample temperature background vapour pressure monitoring....