A5074093642- Electron and X-Ray Spectroscopy Techniques
- Ion-surface interactions and analysis
- Corrosion Behavior and Inhibition
- Semiconductor materials and devices
- Analytical chemistry methods development
- Adsorption, diffusion, and thermodynamic properties of materials
- X-ray Spectroscopy and Fluorescence Analysis
- Metal and Thin Film Mechanics
- Fiber-reinforced polymer composites
- Surface Modification and Superhydrophobicity
- Conducting polymers and applications
- Mass Spectrometry Techniques and Applications
- Mechanical Behavior of Composites
- Geographic Information Systems Studies
- Forensic Fingerprint Detection Methods
- Polymer Surface Interaction Studies
- Polymer Nanocomposites and Properties
- Graphene research and applications
- Cultural Heritage Materials Analysis
- Advancements in Photolithography Techniques
- Advanced Sensor and Energy Harvesting Materials
- Advancements in Battery Materials
- Hydrogen embrittlement and corrosion behaviors in metals
- Surface and Thin Film Phenomena
- Analytical Chemistry and Sensors
University of Surrey
2016-2025
The Faraday Institution
2023-2024
Corpus Christi College
1999-2021
Guildford Hospital
2003-2021
Texas A&M University – Corpus Christi
2021
Umm al-Qura University
2018
University of Southampton
2015
University of Oxford
2015
Interface (United Kingdom)
2015
Physical Sciences (United States)
2013
The highest power conversion efficiencies (PCEs) reported for perovskite solar cells (PSCs) with inverted planar structures are still inferior to those of PSCs regular structures, mainly because lower open-circuit voltages (Voc). Here we report a strategy reduce nonradiative recombination the devices, based on simple solution-processed secondary growth technique. This approach produces wider bandgap top layer and more n-type film, which mitigates recombination, leading an increase in Voc by...
In recent years, gas cluster ion beams (GCIB) have become the cutting edge of beam technology to sputter etch organic materials in surface analysis. However, little is currently known on ability argon ions (Arn+) metal oxides and other technologically important inorganic compounds no depth profiles previously been reported. this work, XPS through a certified (European standard BCR-261T) 30 nm thick Ta2O5 layer grown Ta foil using monatomic Ar+ Ar1000+ performed at different incident...
Abstract The interface between the matrix and reinforcing phases can have a significant effect on mechanical properties of resulting composite material. be studied by number surface analysis techniques interaction modelled. Such studies, such modelling, help understanding mechanisms which composites undergo during their lifetime. current review discusses role methods it studied; two case studies are presented illustrate these value that knowledge has brought to larger investigations....
Battery-supercapacitor hybridisation enables safe charge-discharge operation at high C rate, up to the supercapacitor capacity, while maintaining battery lifetime. However, battery-supercapacitor systems in parallel connection require a DC/DC converter for voltage balance. Hybridisation material level is explored this study aiming avoid use of converter. Different configurations, hybridised level, are investigated with goal maintain long redox plateau and self-balance without need Applying...
The study investigated inter-species variation in particulate matter (PM) accumulation, wash-off, and retention on green wall plants, with a focus leaf characteristics. Ten broadleaf plant species were studied an experimental wall. Ambient PM concentrations remained relatively stable throughout the measurement period: PM1: 16.60 ± 9.97 μgm−3, PM2.5: 23.27 11.88 PM10: 39.59 25.72 μgm−3. Leaf samples taken before after three rainfall events, deposition was measured using Scanning Electron...
ABSTRACT The changes in the local chemical state of W interfacial atoms at buried W/Cu, W/Cr, and W/Mo interfaces multilayers cosputtered alloys have been investigated by analysis using situ XPS/HAXPES. An Auger parameter shift is found to depend on degree miscibility interface being maximum for Mo/W system. This experimental trend cannot be rationalized electronegativity differences between W, Cu, Cr, Mo. nonuniformity electron density studied with (and possible also structural mismatch...
Abstract Poly(dimethylsiloxane) (PDMS) elastomers are widely used in biological laboratories to produce prototype micro‐bioreactors. The need was identified for a simple modification of the PDMS surface prevent protein adsorption and cell attachment certain areas increase level where desirable. A study has been undertaken into effect on adsorbed surfactants sodium hydroxide (NaOH) surface. proteins from Dubecco's Modified Eagles Medium (DMEM) supplemented with foetal calf serum, HEPES,...
Commercially grown, multi-walled carbon nanotubes (MWNTs), available in kilogram quantities from three commercial suppliers have been characterised using a number of analytical techniques. The catalysts used the growth MWNTs are identified by energy dispersive X-ray spectroscopy (EDX) and different mechanisms postulated to explain various structures present MWNT stock its as-supplied form. A tightening agglomerate during purification functionalisation is shown scanning electron microscopy...
The very thin native oxide film on stainless steel, of the order 2 nm, is known to be readily modified by immersion in aqueous media. In this paper, X-ray photoelectron spectroscopy (XPS) and time flight secondary ions mass spectrometry are employed investigate nature air-formed modification after water emersion. described terms oxide, hydroxide, content. preferential dissolution iron shown occur immersion. It that a absorbed layer hydroxide present above oxide-like passive film....
Interface-mediated recombination losses between perovskite and charge transport layers are one of the main reasons that limit device performance, in particular for open-circuit voltage (VOC) solar cells (PSCs). Here, functional molecular interface engineering (FMIE) is employed to retard interfacial losses. The FMIE a facile solution-processed means introducing molecules, fluorene-based conjugated polyelectrolyte (CPE) organic halide salt (OHS) on both contacts absorber layer. Through FMIE,...