A5074799712- Graphene research and applications
- Supercapacitor Materials and Fabrication
- Biosensors and Analytical Detection
- Carbon Nanotubes in Composites
- Advancements in Battery Materials
- Microwave Engineering and Waveguides
- Analytical Chemistry and Sensors
- Antenna Design and Analysis
- Advanced Sensor and Energy Harvesting Materials
- Advanced biosensing and bioanalysis techniques
- Conducting polymers and applications
- Electrochemical sensors and biosensors
- Electrowetting and Microfluidic Technologies
- Neuroscience and Neural Engineering
- Fiber-reinforced polymer composites
- Pulsed Power Technology Applications
- Millimeter-Wave Propagation and Modeling
- Graphene and Nanomaterials Applications
- Photoreceptor and optogenetics research
- Electrochemical Analysis and Applications
- Microfluidic and Capillary Electrophoresis Applications
- 3D Printing in Biomedical Research
- Gas Sensing Nanomaterials and Sensors
- SARS-CoV-2 detection and testing
- Diamond and Carbon-based Materials Research
University of Ulster
2018-2023
University of Southampton
2013-2018
University of Southampton Malaysia
2016-2018
Institute of Materials Research and Engineering
2017-2018
Agency for Science, Technology and Research
2017-2018
Atomic Weapons Establishment
2005-2006
Abstract This paper presents the results of a study on developing an effective technique to increase performance characteristics antenna arrays for sub-THz integrated circuit applications. is essential compensate limited power available from sources. Although conventional array structures can provide solution enhance radiation-gain however in case small-sized radiation properties be adversely affected by mutual coupling that exists between radiating elements. It demonstrated here...
Laser-induced graphene (LIG) on paper substrates is a desirable material for single-use point-of-care sensing with its high-quality electrical properties, low fabrication cost, and ease of disposal. While prior study has shown how the repeated lasing enables synthesis porous graphitic films, however, process-property correlation process surface microstructure electrochemical behavior, including charge-transfer kinetics, missing. The current presents systematic in-depth LIG to elucidate...
Abstract Flexible micro‐supercapacitors, with high energy and power density, using materials a low environmental impact are attractive for next‐generation storage devices. Carbon‐based widely used supercapacitors but can be increased in density via combination metal oxides. Red mud is an iron‐oxide‐rich by‐product of aluminum production, which needs to more utilized reduce its damage. To achieve flexible micro‐supercapacitor device laser‐induced graphene (LIG) supercapacitor realized from...
Sepsis is the body's response to an infection. Existing diagnostic testing equipment not available in primary care settings and requires long waiting times. Lateral flow devices (LFDs) could be employed point-of-care (POC) for sepsis detection; however, they currently lack required sensitivity. Herein, LFDs are constructed using 150-310 nm sized selenium nanoparticles (SeNPs) compared commercial 40 gold (AuNPs) detection of biomarker interleukin-6 (IL-6). Both 310 150 SeNPs reported a lower...
This work demonstrates the applicability of red-mud-reduced graphene oxide (RM-rGO) nanocomposites (NCs) for reliable and selective electrochemical (EC) detection arsenic. The new NC material shows excellent anti-interference activity toward arsenic (As3+) ions with cooccurrence other common cations (Cd2+, Cr2+, Zn2+, Pb2+, Hg2+). Especially, is exceptionally As3+ in presence Cu2+ ions, which stated to be main interfering agent EC As3+. Under optimal experimental conditions, displays a high...
In recent years, metal oxide-based, inexpensive, stable electrodes are being explored as a potent source of high performance, sustainable supercapacitors. Here, the employment industrial waste red mud pseudocapacitive electrode material is reported. Mechanical milling used to produce uniform nanoparticles, which rich in hematite (Fe
The trapping and manipulation of single small numbers cells is becoming increasingly important for the development understanding cell biology, disease predication diagnostics. In present work, we developed two dielectrophoresis (DEP) based microfluidic devices, both embedded with three-dimensional (3D) microelectrodes. first device used trajectory switching cells. second a platform concentration, single, (doublets) three clusters (triplet). Red blood (RBC) to different outlets was achieved...
Cystatin C (CysC) is a biomarker indicative of renal function, and its comorbidities, including heart failure. Generally, enzyme-linked immunosorbent assay (ELISA) can detect CysC in hours but requires skilled personnel, thorough reagent preparation, laboratory setting. Here, we report quantitative lateral flow immunoassays (LFIAs) with two gold nanostructures (AuNSs): nanoparticles (AuNPs) nanorods (AnNRs). UV–Vis suggests 358 μg/ml mAbs AuNPs conjugation 45 AuNRs conjugation. With dynamic...
Environmental sensors play a crucial role in wide range of applications. Among them, humidity that are stable and operational harsh environments incredibly important for process control monitoring. Nanocrystalline graphite (NCG) is type carbon-based thin film material. Previous work has shown NCG excellent mechanical properties able to withstand high radiation doses. The granular structure the makes it good candidate sensing as consists conductive graphitic grains with density sp <sup...
Heart Failure (HF) diagnosis, subsequent admissions, and possible readmissions present challenges for health systems worldwide. An increasing number of patients within an ageing population are surviving cardiac conditions which can leave them with residual heart function impairment. Follow-up visits either confirmed HF sufferers or high-risk could be reduced through the implementation Point-of-Care (PoC) measurement N-terminal pro-B-type natriuretic peptide (NT-proBNP), inactive signal...
This paper describes an induction voltage adder (IVA) being designed by Titan Pulse Sciences Division (TPSD) for AWE Aldermaston, UK. IVA will be used to power the radiography sources in AWE's planned three-axis Hydrodynamic Research Facility (HRF). TPSD provide IVAs and radiographic diodes. The full its initial configuration deliver a 14 MV, 110 kA, 50-60 ns pulse first large area diode then developmental diode. HRF has been utilizing two-conductor water dielectric forming lines (pfls) with...
The simulation, fabrication and characterisation of nanographite MEMS resonators is reported in this paper. deposition achieved using plasma-enhanced chemical vapour directly onto numerous substrates such as commercial silicon wafers. As a result, many the reliability issues devices based on transferred graphene are avoided. presented along with simple undercutting method to overcome buckling, by changing effective stress structure from ~436 MPa compressive, ~13 tensile. electrostatic...
The electrical characteristics of nanocrystalline graphite (NCG) on p-type Si Schottky diodes were investigated. NCG/p-Si fabricated a 6-inch wafer by metal-free catalyst plasma enhanced chemical vapour deposition (PECVD) and photolithography pattern transfer method. NCG film consists nanoscale grains ~35 nm in size. diode shows rectifying behavior with barrier height 0.58 eV. This result addition to nanosized can be exploited towards various gas sensor applications.
Over 60 million tons of E-waste is expected to be generated in 2023, with associated significant impacts on health and the environment. To reduce number products sent landfills, "Right Repair" (RtR) movements are gaining momentum many countries, including UK, USA, EU member states. While Universities seen as important stakeholders drive forward sustainable design practices, there currently little work looking at training undergraduate engineers principles designing household support RtR. In...
This paper presents a 100 μm GaAs-based 0.45-0.50 THz on-chip antenna based on metasurface and substrate integrated waveguide (SIW) technologies to realize high-performance antenna. The design consists of 2×4 array metallic patches with circular slot embedded in rectangular resonator segments horizontal arrangement. are separated from each other by narrow channel create coplanar which is used excite the structure. structure, constructed GaAs substrate, reduces loss surface waves. In...
The sensing potential of a nanocrystalline graphite (NCG) film deposited using plasma enhanced chemical vapour deposition (PECVD) for detecting concentration changes ammonium nitrate and sulphate in aqueous solutions was demonstrated two-terminal resistive setup. sensor shows high linearity the reduction resistance with increasing salt concentrations when tested 0.01 to 2.0M solutions. This work promising outlook application NCG based sensors situ agricultural soil monitoring sufficiently...
In the present work, Poly(ethylene glycol) (PEG) biocompatible hydrogel has been employed for two neural applications: nerve guide conduits and as an in-vitro bioglue. Nerve (NGCs) are widely accepted in treatment of peripheral injuries. first application, we design a simple low-cost method to fabricate hydrogel-based NGCs. this employ light curing 5 seconds NGCs short span time. The fabricated NGC was assessed vitro demonstrate application. efficient, proposed study addresses limitations...
This paper shows that by employing a combination of metamaterial (MTM) and substrate integrated waveguide (SIW) technologies, the drawbacks narrow-bandwidth low radiation properties encountered in terahertz on-chip antennas can be overcome. In addition, an effective feeding mechanism is introduced to excite antenna. The proposed antenna constructed on three stacked layers comprising Silicon-metal-Silicon substrates. Dimensions are 1×1×0.265 mm <sup...