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Outputs (59)

Oxidative Dissolution of Lithium and Manganese from Lithium Manganospinel (LiMn 2 O 4 ): Towards Climate-Smart Processes for Critical Metal Recycling (2023)
Journal Article
Ward, R. A., Kocsis, D., & Wadhawan, J. D. (2023). Oxidative Dissolution of Lithium and Manganese from Lithium Manganospinel (LiMn 2 O 4 ): Towards Climate-Smart Processes for Critical Metal Recycling. Energy advances, https://doi.org/10.1039/d2ya00196a

This work reports the oxidative breakdown of the LiMn2O4 structure using alkaline hypochlorite, as a method for recovering both lithium and manganese species. The heterogeneous dissolution rate for this process is monitored through the formation of t... Read More about Oxidative Dissolution of Lithium and Manganese from Lithium Manganospinel (LiMn 2 O 4 ): Towards Climate-Smart Processes for Critical Metal Recycling.

Empowering clean water whilst safeguarding water distribution pipeline integrity: Towards manganese- and iron-free lime hydrate for water treatment (2023)
Journal Article
Wadhawan, J. D., Kocsis, D., Meyer, C., Ward, R., Thompson, M., Prior, T. J., …Lawrence, N. (2023). Empowering clean water whilst safeguarding water distribution pipeline integrity: Towards manganese- and iron-free lime hydrate for water treatment. Environmental Science: Water Research & Technology, https://doi.org/10.1039/d2ew00109h

Hydrated limes are amongst the most economically valuable alkalis used by the water industry for the treatment of potable water. They are typically manufactured from the thermal decomposition of high purity limestones. However, the latter contain bot... Read More about Empowering clean water whilst safeguarding water distribution pipeline integrity: Towards manganese- and iron-free lime hydrate for water treatment.

Nafion® Coated Electropolymerised Flavanone-based pH Sensor (2022)
Journal Article
Miranda, M., Carvetta, C., Sisodia, N., Shirley, L., Day, C., McGuinness, K., …Lawrence, N. S. (in press). Nafion® Coated Electropolymerised Flavanone-based pH Sensor. Electroanalysis, https://doi.org/10.1002/elan.202100652

This work summarizes the electrochemical response of flavanone carbon composite electrodes in comparison with Nafion®-coated flavanone carbon composite electrodes, for use as voltammetric pH sensors in both buffered and low-buffered media. Square wav... Read More about Nafion® Coated Electropolymerised Flavanone-based pH Sensor.

Asymmetric and Anharmonic Electrode Kinetics: Evaluation of a Model for Electron Transfer with Concerted Rupture of Weak, Inner Shell Interactions (2021)
Journal Article
Lawrence, N. S., Schöllhorn, B., & Wadhawan, J. D. (2021). Asymmetric and Anharmonic Electrode Kinetics: Evaluation of a Model for Electron Transfer with Concerted Rupture of Weak, Inner Shell Interactions. ChemistrySelect, 6(46), 13331-13335. https://doi.org/10.1002/slct.202103526

A surface-integrated form of the widely used (anharmonic) Lennard-Jones 12–6 interaction potential, the Lennard-Jones 9–3 potential, is used to develop a quadratic activation/driving force relationship that gives rise to asymmetric Tafel plots for el... Read More about Asymmetric and Anharmonic Electrode Kinetics: Evaluation of a Model for Electron Transfer with Concerted Rupture of Weak, Inner Shell Interactions.

In situ recalibration of ion selective electrodes (2021)
Journal Article
Wadhawan, J. D., Sisodia, N., Lawrence, N. S., & McGuinness, K. L. (2022). In situ recalibration of ion selective electrodes. Sensors and Diagnostics, 1(1), 134-138. https://doi.org/10.1039/d1sd00003a

Reference electrode drift resulting from the exchange of ions at the solution/reference electrode chamber interface is the number one reason why ion selective electrodes and pH sensors in particular require recalibration, costing companies up to 70%... Read More about In situ recalibration of ion selective electrodes.

Unravelling the Occurrence of Mediator-Blood Protein Interactions via the Redox Catalysis of the Physiological Gasotransmitter Hydrogen Sulfide (2021)
Journal Article
Ward, H. J., Ward, R. A., Lawrence, N. S., & Wadhawan, J. D. (2021). Unravelling the Occurrence of Mediator-Blood Protein Interactions via the Redox Catalysis of the Physiological Gasotransmitter Hydrogen Sulfide. ChemistrySelect, 6(37), 10059-10062. https://doi.org/10.1002/slct.202102974

Ferrocenemethanol is employed as an aqueous, homogeneous redox mediator for hydrogen sulfide. The reaction is seen to follow an EC’ mechanism over the range 6≤pH≤9, with bisulfide reacting four times more rapidly than hydrogen sulfide. In the presenc... Read More about Unravelling the Occurrence of Mediator-Blood Protein Interactions via the Redox Catalysis of the Physiological Gasotransmitter Hydrogen Sulfide.

Interaction of temperature, salinity and extracellular polymeric substances controls trace element incorporation into tufa calcite (2021)
Journal Article
Rogerson, M., Pedley, H. M., Greenway, G. M., & Wadhawan, J. D. (in press). Interaction of temperature, salinity and extracellular polymeric substances controls trace element incorporation into tufa calcite. The Depositional Record, https://doi.org/10.1002/dep2.160

The influence of extracellular polymeric substances on carbonate mineral growth in natural settings remains one of the most poorly understood contributors to the growth of non-marine carbonate sediments. The influences of these materials are complica... Read More about Interaction of temperature, salinity and extracellular polymeric substances controls trace element incorporation into tufa calcite.

Decorating BODIPY with electron-withdrawing NO group: spectroelectrochemical consequences and computational investigation (2021)
Journal Article
Silva, T. L., Nascimento, T. A. D., Almeida, A. K. . A. . D., Melo, S. M. . G., Silva, J. C. . S. . D., Xavier, J. A., …Goulart, M. O. (2021). Decorating BODIPY with electron-withdrawing NO group: spectroelectrochemical consequences and computational investigation. ChemElectroChem, 8(15), 2921-2934. https://doi.org/10.1002/celc.202100609

4,4-difluoro-5,7-dimethyl-4-bora-3a,4a-diaza-s-indacene (BODIPY) and derivatives are an outstanding class of fluorescent dyes. Herein, we report on the introduction of a nitrosyl moiety into the BODIPY structure and its dramatic effect on the observe... Read More about Decorating BODIPY with electron-withdrawing NO group: spectroelectrochemical consequences and computational investigation.

Electrochemically Induced Mesomorphism Switching in a Chlorpromazine Hydrochloride Lyotropic Liquid Crystal (2021)
Journal Article
Crapnell, R. D., Alhasan, H. S., Partington, L. I., Zhou, Y., Ahmed, Z., Altalhi, A. A., …Wadhawan, J. D. (2021). Electrochemically Induced Mesomorphism Switching in a Chlorpromazine Hydrochloride Lyotropic Liquid Crystal. ACS Omega, 6(7), 4630-4640. https://doi.org/10.1021/acsomega.0c05284

The discovery of electrochemical switching of the Lα phase of chlorpromazine hydrochloride in water is reported. The phase is characterized using polarizing microscopy, X-ray scattering, rheological measurements, and microelectrode voltammetry. Fast,... Read More about Electrochemically Induced Mesomorphism Switching in a Chlorpromazine Hydrochloride Lyotropic Liquid Crystal.

Electrochemical quantification of D-glucose during the production of bioethanol from thermo-mechanically pre-treated wheat straw (2021)
Journal Article
Ward, R. A., Charlton, A., Welham, K. J., Baker, P., Zein, S. H., Tomkinson, J., …Wadhawan, J. D. (2021). Electrochemical quantification of D-glucose during the production of bioethanol from thermo-mechanically pre-treated wheat straw. Electrochemistry communications, 124, Article 106942. https://doi.org/10.1016/j.elecom.2021.106942

Mechanical pre-treatment (disc refining) of wheat straw, at both atmospheric and elevated pressure, is shown to be an efficient process to access fermentable monosaccharides, with the potential to integrate within the infrastructure of existing first... Read More about Electrochemical quantification of D-glucose during the production of bioethanol from thermo-mechanically pre-treated wheat straw.

Intra- and Inter-molecular Sulf- hydryl Hydrogen Bonding: Facilitating Proton Transfer Events for Determination of pH in Sea Water (2020)
Journal Article
Sisodia, N., Miranda, M., McGuinness, K. L., Wadhawan, J. D., & Lawrence, N. S. (in press). Intra- and Inter-molecular Sulf- hydryl Hydrogen Bonding: Facilitating Proton Transfer Events for Determination of pH in Sea Water. Electroanalysis, https://doi.org/10.1002/elan.202060332

© 2020 Wiley-VCH GmbH This work presents the electrochemical response of a 2-(methylthio)phenol glassy carbon based electrode for a promising voltammetric pH sensor in both buffered and low-buffered solutions. Electropolymerization of the redox speci... Read More about Intra- and Inter-molecular Sulf- hydryl Hydrogen Bonding: Facilitating Proton Transfer Events for Determination of pH in Sea Water.

Evaporative Mass Loss Measurement as a Quality Control Tool for Quality Assurance in the Manufacture of Inks Suitable for High Speed (≥60 m/min) Printing (2020)
Journal Article
Ward, H. J., Ward, H. J., Armstrong-Telfer, T. A., Armstrong-Telfer, T. A., Kelly, S. M., Kelly, S. M., …Wadhawan, J. D. (2020). Evaporative Mass Loss Measurement as a Quality Control Tool for Quality Assurance in the Manufacture of Inks Suitable for High Speed (≥60 m/min) Printing. Journal of Electroanalytical Chemistry, 872, Article 114328. https://doi.org/10.1016/j.jelechem.2020.114328

In any manufacturing environment, it is always important to be able to embrace a culture of traceability of any non-conformed product. For the case of ink manufacture, operator confusion, leading to the mixing-up of solvents, or connecting the incorr... Read More about Evaporative Mass Loss Measurement as a Quality Control Tool for Quality Assurance in the Manufacture of Inks Suitable for High Speed (≥60 m/min) Printing.

Regular Solution Theory for Polymer Permeation Transients: A Toolkit for Understanding Experimental Waveshapes (2020)
Journal Article
Wadhawan, J., Craster, B. ;., Lawrence, N., & Kelly, S. M. (2020). Regular Solution Theory for Polymer Permeation Transients: A Toolkit for Understanding Experimental Waveshapes. Langmuir : the ACS journal of surfaces and colloids, 36(18), 5003-5020. https://doi.org/10.1021/acs.langmuir.0c00589

The accurate measurement of permeation is important at the product design stage for a variety of industries as diverse as conveyance methods for oil and gas produced fluids, such as mixtures of carbon dioxide, methane, hydrogen sulfide, water, and hy... Read More about Regular Solution Theory for Polymer Permeation Transients: A Toolkit for Understanding Experimental Waveshapes.

Electrochemical immunoassay for the detection of stress biomarkers (2020)
Journal Article
Abdulsattar, J. O., Greenway, G. M., & Wadhawan, J. D. (2020). Electrochemical immunoassay for the detection of stress biomarkers. Heliyon, 6(3), Article e03558. https://doi.org/10.1016/j.heliyon.2020.e03558

A rapid electrochemical immunoassay method was developed to detect and measure stress biomarkers (cortisol and cortisone) in two biological samples (Zebrafish whole-body and artificial saliva). This methodology utilizes an immunoassay approach taking... Read More about Electrochemical immunoassay for the detection of stress biomarkers.

Multiphase Methods in Organic Electrosynthesis (2019)
Journal Article
Marken, F., & Wadhawan, J. D. (2019). Multiphase Methods in Organic Electrosynthesis. Accounts of chemical research, 52(12), 3325-3338. https://doi.org/10.1021/acs.accounts.9b00480

© 2019 American Chemical Society. ConspectusWith water providing a highly favored solution environment for industrial processes (and in biological processes), it is interesting to develop water-based electrolysis processes for the synthesis and conve... Read More about Multiphase Methods in Organic Electrosynthesis.

Imaging immunoassay in negative: Surface-­‐catalysed chemiluminescence for the detection of pregnancy hormones in artificial saliva (2018)
Journal Article
Wright, K. J., Oiaidha, Z. O., Love, D. P., Aljohani, M., Greenway, G. M., & Wadhawan, J. D. (2018). Imaging immunoassay in negative: Surface-­‐catalysed chemiluminescence for the detection of pregnancy hormones in artificial saliva. New journal of chemistry = Nouveau journal de chimie, 42(23), 18641-18648. https://doi.org/10.1039/c8nj02974a

A novel and rapid (45min), quantitative chemiluminescence-based, surface immunoassay is reported for the quantitative detection of progesterone and œstriol in artificial saliva. The detection limits for these pregnancy hormones are 2.3 and 2.5 pg mL-... Read More about Imaging immunoassay in negative: Surface-­‐catalysed chemiluminescence for the detection of pregnancy hormones in artificial saliva.

Performance of lyotropic liquid crystal-based photoelectrochemical capacitors for solar-to- electrical energy conversion (2018)
Conference Proceeding
Halls, J. E., Ward, H. J., Althali, A. A., Testut, L., Kocsis, D., Alhassan, H. S., …Wadhawan, J. D. (2018). Performance of lyotropic liquid crystal-based photoelectrochemical capacitors for solar-to- electrical energy conversion. In F. Kongoli, H. Inufasa, M. Boutelle, R. Compton, J. Dubois, & F. Murad (Eds.), Sustainable Industrial Processing Summit SIPS2018 Volume 2. Amatore Intl. Symp. / on Electrochemistry for Sustainable Development (121-130)

Regenerative photoelectrochemical capacitors, adapted from a experimental system previously reported (J. E. Halls, J. D. Wadhawan, Energy Environ. Sci., 2012, 5, 6541) and based on the doping of a lamellar lyotropic liquid crystal with visible light... Read More about Performance of lyotropic liquid crystal-based photoelectrochemical capacitors for solar-to- electrical energy conversion.

Electrochemical measurement of antibody­‐antigen recognition biophysics: thermodynamics and kinetics of human chorionic gonadotropin (hCG) binding to redox-­tagged antibodies (2018)
Journal Article
Partington, L. I., Atkin, S. L., Kilpatrick, E. S., Morris, S. H., Piper, M., Lawrence, N. S., & Wadhawan, J. D. (2018). Electrochemical measurement of antibody­‐antigen recognition biophysics: thermodynamics and kinetics of human chorionic gonadotropin (hCG) binding to redox-­tagged antibodies. Journal of Electroanalytical Chemistry, 819, 533-541. https://doi.org/10.1016/j.jelechem.2018.02.062

The thermodynamics and kinetics of antigen binding under diffusive conditions to an electrode surface modified with ferrocene-tagged antibodies is studied within this work, and realised experimentally for the case of human chorionic gonadotropin (hGC... Read More about Electrochemical measurement of antibody­‐antigen recognition biophysics: thermodynamics and kinetics of human chorionic gonadotropin (hCG) binding to redox-­tagged antibodies.

Synthesis and antimicrobial effects of highly dispersed, cellulose-stabilized silver/cellulose nanocomposites (2018)
Journal Article
Alahmadi, N. S., Kelly, S. M., Betts, J. W., Heinze, T., Wadhawan, J. D., & Koschella, A. (2018). Synthesis and antimicrobial effects of highly dispersed, cellulose-stabilized silver/cellulose nanocomposites. RSC advances, 8(7), 3646-3656. https://doi.org/10.1039/c7ra12280b

Small, spherical silver nanoclusters were synthesised on the surface of paper as a model cellulosic fibre substrate by a standard chemical reduction method. The concentration of the silver nanoclusters on the substrate surface is roughly proportional... Read More about Synthesis and antimicrobial effects of highly dispersed, cellulose-stabilized silver/cellulose nanocomposites.

Electrochemical investigation of electron-transfer cascades for the development of solar energy conversion based on artificial photosynthesis (2017)
Thesis
Alhasan, H. S. (2017). Electrochemical investigation of electron-transfer cascades for the development of solar energy conversion based on artificial photosynthesis. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4224565

Natural Photosynthesis process is the source of life; it converts the sunlight into chemical energy. This process takes place in the chloroplast of the green plants in a sophisticated and complex pathway. It involves electron transfer cascades from t... Read More about Electrochemical investigation of electron-transfer cascades for the development of solar energy conversion based on artificial photosynthesis.

Synthesis and antibacterial effects of cobalt–cellulose magnetic nanocomposites (2017)
Journal Article
Kelly, S., Kornherr, A., Alahmadi, N. S., Betts, J. W., Francesconi, M. G., Prior, T. J., …Kornherr, A. (2017). Synthesis and antibacterial effects of cobalt–cellulose magnetic nanocomposites. RSC advances, 7(32), 20020-20026. https://doi.org/10.1039/c7ra00920h

© The Royal Society of Chemistry. Green synthesis is employed to prepare cobalt/cellulose nanocomposites with cubic (α-cobalt) cobalt as a main component with antibacterial and magnetic properties. An in situ reduction of aqueous solutions of cobalt... Read More about Synthesis and antibacterial effects of cobalt–cellulose magnetic nanocomposites.

A mechanistic study of the EC′ mechanism – the split wave in cyclic voltammetry and square wave voltammetry (2016)
Journal Article
Song, P., Fisher, A. C., Wadhawan, J. D., Cooper, J. J., Ward, H. J., & Lawrence, N. S. (in press). A mechanistic study of the EC′ mechanism – the split wave in cyclic voltammetry and square wave voltammetry. RSC advances, 6(74), 70237-70242. https://doi.org/10.1039/c6ra08723j

In this paper, a detailed investigation of electrochemical reactions coupled with homogenous chemical steps using cyclic voltammetry (CV) and square wave voltammetry (SWV) was carried out to study the electrocatalytic (EC’) mechanism. In CV, paramete... Read More about A mechanistic study of the EC′ mechanism – the split wave in cyclic voltammetry and square wave voltammetry.

Study of pyridine-mediated electrochemical reduction of CO2 to methanol at high CO2 pressure (2016)
Journal Article
Haywood, S. K., Rybchenko, S. I., Touhami, D., & Wadhawan, J. D. (2016). Study of pyridine-mediated electrochemical reduction of CO2 to methanol at high CO2 pressure. ChemSusChem, 9(13), 1660-1669. https://doi.org/10.1002/cssc.201600267

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The recently proposed highly efficient route of pyridine-catalyzed CO 2 reduction to methanol was explored on platinum electrodes at high CO 2 pressure. At 55 bar (5.5 MPa) of CO 2 , the bulk elec... Read More about Study of pyridine-mediated electrochemical reduction of CO2 to methanol at high CO2 pressure.

A route to unbuffered pH monitoring: A novel electrochemical approach (2016)
Journal Article
Dai, C., Chan, C. I., Barrow, W., Smith, A., Song, P., Potier, F., …Lawrence, N. S. (2016). A route to unbuffered pH monitoring: A novel electrochemical approach. Electrochimica acta, 190, 879-886. https://doi.org/10.1016/j.electacta.2016.01.004

Carbon paste electrodes modified by various dihydroxyquinone derivatives are investigated using both cyclic voltammetry and square wave voltammetry in order to ascertain suitability as voltammetric pH sensors. These electrodes show a Nernstian respon... Read More about A route to unbuffered pH monitoring: A novel electrochemical approach.

Development of a microfluidic device with a screen printed electrode for studies on phase II metabolism (2015)
Thesis
Vasiliadou, R. (2015). Development of a microfluidic device with a screen printed electrode for studies on phase II metabolism. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4222259

Simulating human metabolism by electrochemistry (EC) and mass spectrometry (MS) provides an alternative approach to the existing in vitro and in vivo methodologies. Herein, screen printed electrodes (SPEs) were investigated as potent electrochemical... Read More about Development of a microfluidic device with a screen printed electrode for studies on phase II metabolism.

Development towards a point-of-care system to monitor pregnancy and fertility biomarkers (2015)
Thesis
Wright, K. J. (2015). Development towards a point-of-care system to monitor pregnancy and fertility biomarkers. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4217893

The aim of this thesis was to develop a point of care (POC) device that could monitor progesterone and oestriol in saliva. These hormones have a key role to play in both female fertility and pregnancy. Understanding the concentration of progesterone... Read More about Development towards a point-of-care system to monitor pregnancy and fertility biomarkers.

Cellulose/titanium dioxide nanocomposites and silicon diimide gel as a stationery phase for chromatography (2015)
Thesis
Sajedin, S. M. (2015). Cellulose/titanium dioxide nanocomposites and silicon diimide gel as a stationery phase for chromatography. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4217198

There were two main aims of this thesis, both of which involved the synthesis, often using environmentally friendly (green) methods involving water as the solvent and reagent, and the analysis and determination of the physical properties of novel ino... Read More about Cellulose/titanium dioxide nanocomposites and silicon diimide gel as a stationery phase for chromatography.

Mg/Ca ratios in freshwater microbial carbonates: Thermodynamic, kinetic and vital effects (2014)
Journal Article
Saunders, P., Rogerson, M., Wadhawan, J., Greenway, G., & Pedley, H. (2014). Mg/Ca ratios in freshwater microbial carbonates: Thermodynamic, kinetic and vital effects. Geochimica et cosmochimica acta, 147, 107-118. https://doi.org/10.1016/j.gca.2014.10.014

The ratio of magnesium to calcium (Mg/Ca) in carbonate minerals in an abiotic setting is conventionally assumed to be predominantly controlled by (Mg/Ca)solution and a temperature dependant partition coefficient. This temperature dependence suggests... Read More about Mg/Ca ratios in freshwater microbial carbonates: Thermodynamic, kinetic and vital effects.

Linking mineralisation process and sedimentary product in terrestrial carbonates using a solution thermodynamic approach (2014)
Journal Article
Rogerson, M., Pedley, H. M., Kelham, A., & Wadhawan, J. D. (2014). Linking mineralisation process and sedimentary product in terrestrial carbonates using a solution thermodynamic approach. Earth surface dynamics European Geosciences Union, 2(1), 197-216. https://doi.org/10.5194/esurf-2-197-2014

Determining the processes which generate terrestrial carbonate deposits (tufas, travertines and to a lesser extent associated chemical sediments such as calcretes and speleothems) is a long-standing problem. Precipitation of mineral products from sol... Read More about Linking mineralisation process and sedimentary product in terrestrial carbonates using a solution thermodynamic approach.

Empowering the smart grid: Can redox batteries be matched to renewable energy systems for energy storage? (2013)
Journal Article
Halls, J. E., Hawthornthwaite, A., Hepworth, R. J., Roberts, N. A., Wright, K. J., Zhou, Y., …Wadhawan, J. D. (2013). Empowering the smart grid: Can redox batteries be matched to renewable energy systems for energy storage?. Energy & environmental science, 6(3), 1026-1041. https://doi.org/10.1039/c3ee23708g

The charging of an undivided cerium-zinc redox battery by various current waveforms some of which mimic the output of renewable energy (solar, wind, tidal, biofuel burning) to electricity transducers is considered in this work, where the battery oper... Read More about Empowering the smart grid: Can redox batteries be matched to renewable energy systems for energy storage?.

Energy conversion and storage via photoelectrochemical methods (2013)
Thesis
Altalhi, A. A. (2013). Energy conversion and storage via photoelectrochemical methods. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4220658

Photoelectro analytical chemistry provides an elegant technique by which to explore, amongst others, various industrial and environmental applications. To this end, four areas of photoelectroanalytical chemistry are investigated in order to develop i... Read More about Energy conversion and storage via photoelectrochemical methods.

Photogalvanic cells based on lyotropic nanosystems: towards the use of liquid nanotechnology for personalised energy sources (2012)
Journal Article
Halls, J. E., & Wadhawan, J. D. (2012). Photogalvanic cells based on lyotropic nanosystems: towards the use of liquid nanotechnology for personalised energy sources. Energy & environmental science, 5(4), 6541-6551. https://doi.org/10.1039/c2ee03169h

A lightweight, autonomous and practical, proof-of-concept electrical power source is developed within this work. It comprises a photoredox-active material embedded within the non-ionic surfactant subphase, with a second redox reagent present within t... Read More about Photogalvanic cells based on lyotropic nanosystems: towards the use of liquid nanotechnology for personalised energy sources.

Synthesis and surface modification of nanorods for investigation into organic-inorganic hybrid materials (2012)
Thesis
Bourne, R. W. (2012). Synthesis and surface modification of nanorods for investigation into organic-inorganic hybrid materials. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4214534

The research presented in this thesis is focused towards the synthesis of a new kind of giant hybrid liquid crystal consisting of organic semiconductor molecules surrounding an inorganic semiconductor with a nanorod shape with the potential for use i... Read More about Synthesis and surface modification of nanorods for investigation into organic-inorganic hybrid materials.

Wastewater as a photoelectrochemical fuel source: light-to-electrical energy conversion with organochloride remediation (2012)
Journal Article
Halls, J. E., Johnson, T., Altalhi, A. A., & Wadhawan, J. D. (2012). Wastewater as a photoelectrochemical fuel source: light-to-electrical energy conversion with organochloride remediation. Electrochemistry communications, 22, 4-7. https://doi.org/10.1016/j.elecom.2012.04.024

A photogalvanic cell that employs 2,4-dichlorophenol as a fuel source, an N-substituted phenothiazine as light harvester, and sacrificial zinc anode is presented, and shown to afford a ca. 4% light-to-electrical power conversion efficiency in violet... Read More about Wastewater as a photoelectrochemical fuel source: light-to-electrical energy conversion with organochloride remediation.

Voltammetry within structured liquid nanosystems: towards the design of a flexible, three-dimensional framework for artificial photosystems (2012)
Journal Article
Halls, J. E., Wright, K. J., Pickersgill, J. E., Smith, J. P., Altalhi, A. A., Bourne, R. W., …Wadhawan, J. (2012). Voltammetry within structured liquid nanosystems: towards the design of a flexible, three-dimensional framework for artificial photosystems. Electrochimica acta, 70, 215-227. https://doi.org/10.1016/j.electacta.2012.03.052

Normal lyotropic liquid crystals (in the lamellar or hexagonal phases) are investigated as a route to afford a structured, three-dimensional, quasi-biphasic framework within which electron transfer cascades may be initiated voltammetrically. For mode... Read More about Voltammetry within structured liquid nanosystems: towards the design of a flexible, three-dimensional framework for artificial photosystems.

Electrochemistry of organometallic lyotropic chromonic liquid crystals (2012)
Journal Article
Halls, J. E., Bourne, R. W., Wright, K. J., Partington, L. I., Tamba, M. G., Zhou, Y., …Wadhawan, J. D. (2012). Electrochemistry of organometallic lyotropic chromonic liquid crystals. Electrochemistry communications, 19(1), 50-54. https://doi.org/10.1016/j.elecom.2012.02.032

Two aqueous lyotropic chromonic liquid crystals made from nickel(II) or copper(II) phthalocyananine tetrasulfonic acid tetrasodium salt are prepared with characterisation through optical polarising microscopy, X-ray diffraction and conductivity. Thes... Read More about Electrochemistry of organometallic lyotropic chromonic liquid crystals.

Concentration-dependent diffusion coefficients of tert-butylferrocene within dodecyltrimethylammonium chloride/brine liquid crystals (2012)
Journal Article
Halls, J. E., Altalhi, A. A., De Abreu, F. C., Goulart, M. O., & Wadhawan, J. D. (2012). Concentration-dependent diffusion coefficients of tert-butylferrocene within dodecyltrimethylammonium chloride/brine liquid crystals. Electrochemistry communications, 17, 41-44. https://doi.org/10.1016/j.elecom.2012.01.013

The title lyotropic liquid crystal is examined as a framework to investigate long-range charge transfer, using tert-butylferrocene (tBuFc) as model hydrophobic system. It is found that the apparent one-dimensional diffusion coefficient depends on the... Read More about Concentration-dependent diffusion coefficients of tert-butylferrocene within dodecyltrimethylammonium chloride/brine liquid crystals.

Voltammetric Immunoassay for the Detection of Protein Biomarkers (2012)
Journal Article
Haswell, S. J., Dou, Y., Wadhawan, J., & Greenman, J. (2012). Voltammetric Immunoassay for the Detection of Protein Biomarkers. Electroanalysis, 24(2), 264-272. https://doi.org/10.1002/elan.201100676

A strategy for a fast (ca. 20 min), specific, electrochemical immunoassay for the cardiac biomarker creatine kinase (CK) and the human cytokine interleukin 10 (IL10) has been developed in this paper. The polyaniline modified gold surface formed from... Read More about Voltammetric Immunoassay for the Detection of Protein Biomarkers.

Electrochemical estimation of diffusion anisotropy of N,N,N′,N′-tetramethyl-para-phenylenediamine within the normal hexagonal lyotropic mesophase of triton X 100/light water: when can the effects of cross-pseudophase electron transfer be neglected for partitioned reagents? (2011)
Journal Article
Halls, J. E., Lawrence, N. S., & Wadhawan, J. D. (2011). Electrochemical estimation of diffusion anisotropy of N,N,N′,N′-tetramethyl-para-phenylenediamine within the normal hexagonal lyotropic mesophase of triton X 100/light water: when can the effects of cross-pseudophase electron transfer be neglected for partitioned reagents?. Journal of Physical Chemistry B, 115(20), 6509-6523. https://doi.org/10.1021/jp201806f

The H1 lyotropic liquid crystalline phase of Triton X 100 with aqueous 0.1 M potassium chloride is examined as a medium in which to determine the axiosymmetric anisotropy in the diffusion flux of N,N,N′,N′-tetramethyl-para-phenylenediamine using elec... Read More about Electrochemical estimation of diffusion anisotropy of N,N,N′,N′-tetramethyl-para-phenylenediamine within the normal hexagonal lyotropic mesophase of triton X 100/light water: when can the effects of cross-pseudophase electron transfer be neglected for partitioned reagents?.

Electron hopping rate measurements in ITO junctions: charge diffusion in a layer-by-layer deposited ruthenium(II)-bis(benzimidazolyl)pyridine-phosphonate- TiO2 film (2011)
Journal Article
Cummings, C. Y., Wadhawan, J. D., Nakabayashi, T., Haga, M. A., Rassaei, L., Dale, S. E., …Marken, F. (2011). Electron hopping rate measurements in ITO junctions: charge diffusion in a layer-by-layer deposited ruthenium(II)-bis(benzimidazolyl)pyridine-phosphonate- TiO2 film. Journal of Electroanalytical Chemistry, 657(1-2), 196-201. https://doi.org/10.1016/j.jelechem.2011.04.010

Focused ion beam (FIB) machining allowed a sub-micron trench to be cut through tin-doped indium oxide (ITO) film on glass to give a generator - collector junction electrode with narrow gap (ca. 600 nm). A layer-by-layer deposited film composed of a d... Read More about Electron hopping rate measurements in ITO junctions: charge diffusion in a layer-by-layer deposited ruthenium(II)-bis(benzimidazolyl)pyridine-phosphonate- TiO2 film.

Biphasic voltammetry of N, N, N ', N '-tetraphenyl-para-phenylenediamine microdroplets, microparticles and microparticle suspensions (2011)
Journal Article
Halls, J. E., & Wadhawan, J. D. (2011). Biphasic voltammetry of N, N, N ', N '-tetraphenyl-para-phenylenediamine microdroplets, microparticles and microparticle suspensions. Electroanalysis, 23(4), 997-1006. https://doi.org/10.1002/elan.201000633

The aqueous biphasic voltammetry of the title compound is examined when it is immobilised on an electrode surface either when dissolved in an array of nitrobenzene droplets, in the form of solid microparticles, or when an electrode is immersed into a... Read More about Biphasic voltammetry of N, N, N ', N '-tetraphenyl-para-phenylenediamine microdroplets, microparticles and microparticle suspensions.

Viability of plant spore exine capsules for microencapsulation (2010)
Journal Article
Barrier, S., Diego-Taboada, A., Thomasson, M. J., Madden, L., Pointon, J. C., Wadhawan, J. D., …Mackenzie, G. (2011). Viability of plant spore exine capsules for microencapsulation. Journal of Materials Chemistry, 21(4), 975-981. https://doi.org/10.1039/c0jm02246b

Sporopollenin exine capsules (SECs) (outer exoskeletal wall of the spores of Lycopodium clavatum) were extracted and examined for their potential use as microcapsules. They were shown, by laser scanning confocal microscopy (LSCM), to be void of their... Read More about Viability of plant spore exine capsules for microencapsulation.

Comparison of Birch with electrochemical reduction of 2,3-diphenyl-1,4- diazaspiro[4.5]deca-1,3-diene (2010)
Journal Article
Zhou, Y., Andreou, A., Biktagirov, E., Eames, J., & Wadhawan, J. (2010). Comparison of Birch with electrochemical reduction of 2,3-diphenyl-1,4- diazaspiro[4.5]deca-1,3-diene. Electrochemistry communications, 12(11), 1493-1497. https://doi.org/10.1016/j.elecom.2010.08.016

Reduction of 2,3-diphenyl-1,4-diazaspiro[4.5]deca-1,3-diene is investigated both voltammetrically (glassy-carbon electrode, 20°C, non-aqueous-solvents) and using dissolving-metals (sodium, −78°C, tetrahydrofuran (THF)/NH3(l)). Remarkably, electro-red... Read More about Comparison of Birch with electrochemical reduction of 2,3-diphenyl-1,4- diazaspiro[4.5]deca-1,3-diene.

Microfluidic perfusion system for maintaining viable heart tissue with real-time electrochemical monitoring of reactive oxygen species (2010)
Journal Article
Cheah, L., Dou, Y. H., Seymour, A. M. L., Dyer, C. E., Haswell, S. J., Wadhawan, J. D., & Greenman, J. (2010). Microfluidic perfusion system for maintaining viable heart tissue with real-time electrochemical monitoring of reactive oxygen species. Lab on a chip, 10(20), 2720-2726. https://doi.org/10.1039/c004910g

A microfluidic device has been developed to maintain viable heart tissue samples in a biomimetic microenvironment. This device allows rat or human heart tissue to be studied under pseudo in vivo conditions. Effluent levels of lactate dehydrogenase an... Read More about Microfluidic perfusion system for maintaining viable heart tissue with real-time electrochemical monitoring of reactive oxygen species.

Amperometric measurement of gaseous hydrogen sulfide via a Clark-type approach (2010)
Journal Article
Horn, J. J., Wadhawan, J., & Mccreedy, T. (2010). Amperometric measurement of gaseous hydrogen sulfide via a Clark-type approach. Analytical Methods, 2(9), 1346-1354. https://doi.org/10.1039/c0ay00338g

The direct oxidation of hydrogen sulfide in the range 2.0-20 parts per million by volume (ppmv) using a Clark-type amperometric gas sensing methodology is investigated via amperometric transients at 298 K. The diluent gas employed is air (20.9% O-2 i... Read More about Amperometric measurement of gaseous hydrogen sulfide via a Clark-type approach.

Electrochemistry and charge transport in sporopollenin particle arrays (2010)
Journal Article
Thomasson, M. J., Baldwin, D. J., Diego-Taboada, A., Atkin, S. L., Mackenzie, G., & Wadhawan, J. D. (2010). Electrochemistry and charge transport in sporopollenin particle arrays. Electrochemistry communications, 12(10), 1428-1431. https://doi.org/10.1016/j.elecom.2010.07.038

Electrochemical oxidation of hollow sporopollenin particles immobilised on an electrode surface is investigated in aqueous acidic solution. Redox activity is demonstrated to occur via a mixture of 2e(-)-2H(+) and 2e(-)-1H(+) processes, likely due to... Read More about Electrochemistry and charge transport in sporopollenin particle arrays.

Immobilized anthraquinone for redox mediation of horseradish peroxidase for hydrogen peroxide sensing (2009)
Journal Article
Dou, Y., Haswell, S., Greenman, J., & Wadhawan, J. (2009). Immobilized anthraquinone for redox mediation of horseradish peroxidase for hydrogen peroxide sensing. Electrochemistry communications, 11(10), 1976-1981. https://doi.org/10.1016/j.elecom.2009.08.032

The detection of hydrogen peroxide is detailed using horseradish peroxidase and anthraquinone. Both species are immobilized on a glassy carbon electrode substrate. This dual immobilization gives rise to lower detection limits compared with the situat... Read More about Immobilized anthraquinone for redox mediation of horseradish peroxidase for hydrogen peroxide sensing.

Electrochemical Determination of Diffusion Anisotropy in Molecularly-Structured Materials (2009)
Journal Article
Evans, L. A., Thomasson, M. J., Kelly, S. M., & Wadhawan, J. (2009). Electrochemical Determination of Diffusion Anisotropy in Molecularly-Structured Materials. Journal of physical chemistry. C, 113(20), 8901-8910. https://doi.org/10.1021/jp806322c

Theory is presented for the case of two-dimensional diffusion anisotropy in axiosymmetric systems, which, advantageously and indirectly, affords a unified theory of diffusive mass transport at planar, microdisk (or nanodisk) and cylindrical electrode... Read More about Electrochemical Determination of Diffusion Anisotropy in Molecularly-Structured Materials.

Electrogenerated chemiluminescence at droplet-modified electrodes: towards biphasic pKₐ measurement via proton-coupled electron transfer at liquid|liquid interfaces (2009)
Journal Article
Lledo-Fernandéz, C., Hatay, I., Ball, M. J., Greenway, G. M., & Wadhawan, J. (2009). Electrogenerated chemiluminescence at droplet-modified electrodes: towards biphasic pKₐ measurement via proton-coupled electron transfer at liquid|liquid interfaces. New journal of chemistry = Nouveau journal de chimie, 33(4), 749-759. https://doi.org/10.1039/b810844g

This preliminary work reports, for the first time, electrogenerated chemiluminescence (ECL) at droplet-modified electrodes. The system involves oxidation of aqueous tris(2,2′-bipyridyl)ruthenium(ii) ions at a glassy carbon electrode on which a random... Read More about Electrogenerated chemiluminescence at droplet-modified electrodes: towards biphasic pKₐ measurement via proton-coupled electron transfer at liquid|liquid interfaces.

pH testing for detecting the position of nasogastric tubes in adults and children (2009)
Journal Article
Kalia, S., Hall, J., El-Habbal, M., Imrie, C., Arabiat, D. H., Shields, L., …Elliott, B. (2009). pH testing for detecting the position of nasogastric tubes in adults and children. Cochrane Database of Systematic Reviews, 28126. https://doi.org/10.1002/14651858.cd007660

This is the protocol for a review and there is no abstract. The objectives are as follows: Our objective is to determine if there is sufficient evidence to recommend the use of pH testing (the intervention under scrutiny) for verification of correct... Read More about pH testing for detecting the position of nasogastric tubes in adults and children.

Anion-dependent micelle formation using electro-generated ferrocene surfactants (2008)
Journal Article
Evans, L. A., Apreutesei, D., Mehl, G., & Wadhawan, J. (2008). Anion-dependent micelle formation using electro-generated ferrocene surfactants. Electrochemistry communications, 10(11), 1720-1723. https://doi.org/10.1016/j.elecom.2008.08.046

The syntheses and characterization of two ferrocene oils, 4-octyloxy-2-{5-[1,1,3,3-tetramethyl-3-(11-oxo-11-ferrocenyl-undecyl)-disiloxanyl]-pentyloxy}-benzoic acid 4'-undecyloxy-biphenyl-4-yl ester, Fc1SiM and an octakis(ferrocene) species, Fc8Si8M'... Read More about Anion-dependent micelle formation using electro-generated ferrocene surfactants.

New insights into biological influence on the geochemistry of freshwater carbonate deposits (2008)
Journal Article
Rogerson, M., Pedley, H. M., Wadhawan, J. D., & Middleton, R. (2008). New insights into biological influence on the geochemistry of freshwater carbonate deposits. Geochimica et cosmochimica acta, 72(20), 4976-4987. https://doi.org/10.1016/j.gca.2008.06.030

Ambient temperature freshwater carbonates ("tufas") have outstanding potential as palaeoclimate archives. However, it has proven difficult to constrain the behaviour of the geochemical parameters on which important proxy systems rely. Current thinkin... Read More about New insights into biological influence on the geochemistry of freshwater carbonate deposits.

N-N bond cleavage in N-nitrosoarylamines (2008)
Journal Article
Evans, L. A., Petrovic, M., Antonijevic, M., Wiles, C., Watts, P., & Wadhawan, J. (2008). N-N bond cleavage in N-nitrosoarylamines. Journal of physical chemistry. C, 112(33), 12928-12935. https://doi.org/10.1021/jp710473a

The rupture of N-N bonds in three specific N-nitrosoarylamines (N,N'-dimethyl-N,N-dinitroso-para-phenylenediamine, Cupferron, and N-nitrosodiphenylamine) upon electrochemical oxidation in acetonitrile solution is investigated. In two cases, viz., Cup... Read More about N-N bond cleavage in N-nitrosoarylamines.

Reaction between L-cysteine and 10-methylphenothiazine cation radical released from droplet-modified electrodes (2008)
Journal Article
Horn, J. J., Watson, A., Lewis, M., McCreedy, T., & Wadhawan, J. D. (2008). Reaction between L-cysteine and 10-methylphenothiazine cation radical released from droplet-modified electrodes. Electrochemistry communications, 10(9), 1384-1387. https://doi.org/10.1016/j.elecom.2008.07.021

The electrochemical oxidation of 10-methylphenothiazine (PMe) dissolved in 1,2-trans-dibromocyclohexane oil droplets immobilised on a basal plane pyrolytic graphite (BPPG) electrode and bathed by an aqueous electrolyte is a one-electron quasi-reversi... Read More about Reaction between L-cysteine and 10-methylphenothiazine cation radical released from droplet-modified electrodes.

Electroanalytical chemistry for biological and environmental applications (2008)
Thesis
Evans, L. A. (2008). Electroanalytical chemistry for biological and environmental applications. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4208811

Electroanalytical chemistry provides an elegant technique by which to explore, amongst others, various biological and environmental applications. To this end, four areas of electroanalytical chemistry are investigated in order to develop biologically... Read More about Electroanalytical chemistry for biological and environmental applications.