A5089845951- Electrochemical Analysis and Applications
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Conducting polymers and applications
- Supercapacitor Materials and Fabrication
- Allergic Rhinitis and Sensitization
- Physics of Superconductivity and Magnetism
- Ionic liquids properties and applications
- 2D Materials and Applications
- Food Allergy and Anaphylaxis Research
- Magnetic and transport properties of perovskites and related materials
- Advanced Sensor and Energy Harvesting Materials
- Nanopore and Nanochannel Transport Studies
- Advanced Cellulose Research Studies
- Cell Image Analysis Techniques
- Electrocatalysts for Energy Conversion
- Electrospun Nanofibers in Biomedical Applications
- Biosensors and Analytical Detection
- Contact Dermatitis and Allergies
- Fuel Cells and Related Materials
- Magnetic properties of thin films
- Chalcogenide Semiconductor Thin Films
- Entomological Studies and Ecology
- Quantum and electron transport phenomena
- Single-cell and spatial transcriptomics
University of Bath
2014-2025
University of Warwick
2004-2008
Oak Ridge National Laboratory
2003
Optical microscopes are an essential tool for both the detection of disease in clinics, and scientific analysis. However, much world access to high-performance microscopy is limited by upfront cost maintenance equipment. Here we present open-source, 3D-printed, fully-automated laboratory microscope, with motorised sample positioning focus control. The microscope highly customisable, a number options readily available including trans- epi- illumination, polarisation contrast imaging,...
The rhenium and technetium diselenides disulfides are van der Waals layered semiconductors in some respects similar to more well-known transition metal dichalcogenides (TMD) such as molybdenum sulfide. However, their symmetry is lower, consisting only of an inversion center, so that turning a layer upside-down (that is, applying C2 rotation about in-plane axis) not operation, but reverses the sign angle between two nonequivalent crystallographic axes. A given thus can be placed on substrate...
Polyaniline (PANI)/Pt nanoparticle composites can be prepared by the spontaneous redox reaction of K2PtCl4 with PANI, to yield thin films that show electrocatalytic properties in both acidic and neutral aqueous media.
Ferrocene-decorated cellulose nanowhiskers were prepared by the grafting of ethynylferrocene onto azide functionalized cotton-derived using azide–alkyne cycloaddition. Successful surface modification and retention crystalline morphology nanocrystals was confirmed elemental analysis, inductively coupled plasma-atomic emission spectroscopy, X-ray photoelectron diffraction. The coverage with ferrocenyl is high (approximately 1.14 × 10–3 mol g–1 or 4.6 1013 cm–2 corresponding to a specific area...
The interfacial capacitance of graphene foam electrodes (Gii-Sens) in contact to aqueous media (determined by electrochemical impedance spectroscopy) is strongly affected adsorption 1-pyrenemethylamine (PMA). An order magnitude increase upon ascribed predominantly the quantum contribution (i.e. changes electronic density states layers) response cationic adsorbent. A change (reversible) observed as a function pH. Although likely be linked amine protonation, measured occurs over wide range pH...
ReSe2 and ReS2 are unusual compounds amongst the layered transition metal dichalcogenides as a result of their low symmetry, with characteristic in-plane anisotropy due to rhenium chains. They preserve inversion symmetry independent number layers and, in contrast more well-known dichalcogenides, bulk few-monolayer Re-TMD have been proposed behave electronically vibrational decoupled layers. Here, we probe for first time electronic band structure by direct nanoscale angle-resolved...
Modern Superconducting QUantum Interference Devices (SQUIDs) are commonly fabricated from either Al or Nb electrodes, with an in-situ oxidation process to create a weak link between them. However, common problems of such planar nano- and micro-SQUIDs hysteretic current-voltage curves, shallow flux modulation depth. Here, we demonstrate the formation both Josephson junctions SQUIDs using dry transfer technique stack deterministically misalign flakes NbSe$_{2}$; allowing one overcome these...
We describe investigations of the largely unexplored field mesoscopic type-I superconductors. Micromagnetometry and 3D Ginzburg-Landau simulations our single crystal $\ensuremath{\beta}$-tin samples in this regime reveal size- temperature-dependent supercritical fields whose behavior is radically different from bulk critical ${H}_{c}^{B}$. find that complete suppression intermediate state medium-size can result a surprising reduction significantly below also an evolution...
A new series of bis(ferrocenylethynyl) complexes, 3-7, and a mono(ferrocenylethynyl) complex, 8, have been synthesized incorporating conjugated heterocyclic spacer groups, with the ethynyl group facilitating an effective long-range intramolecular interaction. The complexes were characterized by NMR, IR, UV-vis spectroscopy as well X-ray crystallography. redox properties these investigated using cyclic voltammetry spectroelectrochemistry. Although there is large separation ∼14 Å between two...
Generator-collector electrode systems are based on two independent working electrodes with overlapping diffusion fields where chemically reversible redox processes (oxidation and reduction) coupled to give amplified current signals. A generator-collector trench system prepared from tin-doped indium oxide (ITO) placed vis-à-vis a 22 μm inter-electrode gap is employed here as sensor in aqueous media. The 2-electron anthraquinone-2-sulfonate demonstrated well-defined collector responses even...
Abstract A novel way to produce ultrathin transparent carbon layers on tin‐doped indium oxide (ITO) substrates is developed. The ITO surface coated with cellulose nanofibrils (from sisal) via layer‐by‐layer electrostatic binding poly(diallyldimethylammonium chloride) or PDDAC acting as the binder. nanofibril‐PDDAC composite film then vacuum‐carbonised at 500 °C. resulting films are characterised by atomic force microscopy (AFM), small angle X‐ray scattering (SAXS), wide‐angle (WAXS), and...
A major allergen from an extract of the house dust mite, Dermatophagoides farinae , was shown to be extremely heterogenic with respect charge. slightly basic component this a pI 8, purified by isoelectric focusing m two steps. The component, denoted antigen 19/20 IIa, seemed representative for allergenic activity allergen. amino acid analysis suggested that IIa had molecular weight 9400 and contained one residue galactosamine. SDS polyacrylamide gel electrophoresis did indicate somewhat...
Abstract Pure organic films consisting of polypyrrole, polyaniline and a composite polypyrrole electrodeposited in the ionic liquid EMIM‐TFSI onto mesoporous carbon electrodes are tested for their hydrogen evolution reaction capabilities. The use these intrinsically conducting polymers is seen as way stepping away from expensive rare metallic catalysts. Co‐polymerisation 1 : 10 ratio was found to be doped with TFSI − anion much more active when compared pure polymers. Tafel analysis gave...
The shape evolution of mesoscopic tin crystals electrodeposited on boron-doped diamond (BDD) substrates is described as a function the ion concentration and deposition potential. Concentrations 5–100 mM Sn(II) in 1 M fluoroboric acid have been explored electron micrographs deposited used to characterise different shapes sizes obtained. Low concentrations low overpotentials result faceted cuboid-shaped while higher potentials yield highly complex fractal-like structures with high surface...