In Situ Recalibration of Ion Selective Electrodes (2021)
Journal Article
Wadhawan, J., & Lawrence, N. (in press). In Situ Recalibration of Ion Selective Electrodes. Sensors and Diagnostics, 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.

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., Welham, K. J., Zein, S. H., Richards, D. I., Kelly, S. M., Lawrence, N. S., …Lawrence, N. (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.

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.

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.