Faculty of Science: Recent submissions

Now showing items 161-180 of 655

The effects of hydrogen sorption on the resistance and work-function of titanium films at 290K

Kandasamy, K; Surplice, N.A (Elsevier B.V., 1984)

Ti films readily sorbed hydrogen up to an atomic ratio r=2.0 at a saturation pressure of 2*10-3 Torr. The turning points on the curve of resistance R versus r were correlated with the phase boundaries. The maximum on this ...
The predominance of a surface plane of high work function on Ti films

Kandasamy, K; Surplice, N.A (Elsevier B.V., 1981)

The contact potential between clean Ti films and an Au reference surface have been determined by the Kelvin vibrating capacitor method. The majority of Ti films deposited on glass substrates had a high work function, which ...
Contrasting pKa of protonated bis(3-aminopropyl)-terminated polyethylene glycol "Jeffamine" and the associated thermodynamic parameters in solution and covalently attached to graphite surfaces

Abiman, P.; Wildgoos, G.G; Crossley, A.; Jones, J.H; Compton, R.G (Wiley-VCH Verlag GmbH & Co. KGaA, 2007)

The pKa value of protonated Jeffamine (bis(3-aminopropyl) terminated polyethylene glycol) in solution and attached as a monolayer to graphite surfaces has been determined using Potentiometrie titration. The protonated ...
The convenient determination of palladium at a solid electrode via adsorptive stripping voltammetry at a glassy carbon electrode modified with a random array of mercury nanodroplets

Abiman, P.; Wildgoos, G.G; Xiao, L; Compton, R.G (Wiley-VCH Verlag GmbH & Co. KGaA, 2008-07)

The detection of palladium using adsorptive stripping voltammetry reported by Wang et al. (J. Wang, K. Varughese Anal. Chim. Acta 1987, 199, 185 [3]) at a hanging mercury drop electrode is extended to a more convenient ...
Electroanalytical exploitation of nitroso phenyl modified carbon-thiol interactions: Application to the low voltage determination of thiols

Abiman, P.; Wildgoos, G.G; Compton, R.G (Wiley-VCH Verlag GmbH & Co. KGaA, 2007)

The electrochemical generation of nitrosophenyl groups covalently attached to graphite powder (nitrosophenylcarbon) from carbon powder chemically modified with nitrophenyl groups and their subsequent reaction with thiols ...
A mechanistic investigation into the covalent chemical derivatisation of graphite and glassy carbon surfaces using aryldiazonium salts

Abiman, P.; Wildgoos, G.G; Compton, R.G (John Wiley & Sons, Ltd, 2008)

Modification of carbon materials such as graphite and glassy carbon in bulk quantities using diazonium salts is developed. We used both 4-nitrobenzenediazonium tetrafluoroborate and 1-antharaquinonediazonium chloride to ...
Investigating the thermodynamic causes behind the anomalously large shifts in pKa values of benzoic acid-modified graphite and glassy carbon surfaces

Abiman, P.; Crossley, A; Wildgoose, G.G; Jones, J.H; Compton, R.G (American Chemical Society, 2007)

The difference between the values of 4-carboxyphenyl groups, covalently attached to either graphite (BAcarbon) or glassy carbon (BA-GC) surfaces, and benzoic acid in solution is explored using Potentiometrie titration and ...
Quantitative studies of metal ion adsorption on a chemically modified carbon surface: adsorption of Cd(II) and Hg(II) on glutathione modified carbon

Abiman, P.; Wildgoos, G.G; Crossley, A; Compton, R.G (Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim, 2009)

The adsorption behavior of model toxic metal cations namely Cd(II) and Hg(II) on carbon surfaces chemically modified by glutathione was investigated as a function of the concentration of Cd2+ and Hg2+ ions, time and the ...
Co-ordination of hydrazine and substituted hydrazines on reaction with [Rh2(CO)4Cl2] and disproportionation of 1,2-N2H2Ph2

Barkley, J.V; Heaton, B.T; Jacob, C; Mageswaran, R; Sampanthar, J.T (Journal of the Chemical Society - Dalton Transactions, 1998)

The progressive addition of hydrazine and the following increasingly substituted hydrazines L (N2H4 Ia, H2NNHMe Ib, H2NNHPh Ie, H2NNMe2 Id, or MeHNNHMe Ic) to [Rh2(CO)4Cl2] resulted in the initial formation of [{Rh(CO)2Cl}2(μ-L)] ...
Removal of palladium ions from aqueous systems by chemically modified cysteine carbon powder

Abiman, P.; Wildgoos, G.G; Crossley, A; Compton, R.G (The Royal Society of Chemistry, 2008)

l-Cysteine methyl ester modified graphite powder (Cyscarbon) was used as a material to remove palladium ions from aqueous media. Cheap graphite powders (2-20 μm in diameter) were surface functionalised with l-cysteine ...
Proceedings of the international conference on advanced materials for clean energy and health applications (AMCEHA 2019)

Karazhanov, S.; Venkatachalapathy, V.; Senthilnanthanan, M. (University of Jaffna, 2019)

Demand for clean energy is going to be immense in the future and it is of utmost interest for the research community to work on novel ideas and find solutions for the challenges facing the clean energy sector. Growing world ...
Development of the major arboviral vector Aedes aegypti in urban drain-water and associated pyrethroid insecticide resistance is a potential global health challenge

Surendran, S.N.; Jayadas, T.T.P.; Sivabalakrishnan, Kokila; Santhirasegaram, Sharanga; Karvannan, Kalingarajah; Weerarathne, T.C.; Karunaratne, S. H. P. P. (University of Jaffna, 2019)

: Aedes aegypti were found developing in the water in open public drains (drain-water, DW) in Jafna city in northern Sri Lanka, a location where the arboviral diseases dengue and chikungunya are endemic.
A Computational Study of Defects, Li-Ion Migration and Dopants in Li2ZnSiO4 Polymorphs

Perera, D.; Sashikesh, G.; Sashikesh, N.; Chroneos, A. (MDPI, 2019)

Lithium zinc silicate, Li2ZnSiO4, is a promising ceramic solid electrolyte material for Li-ion batteries. In this study, atomistic simulation techniques were employed to examine intrinsic defect processes; long range Li-ion ...
Defects and Calcium Diffusion in Wollastonite

Nimasha, S.; Sashikesh, G.; Kuganathan, N.; Davazoglou, K.; Chroneos, A. (MDPI, 2020)

Wollastonite (CaSiO3) is an important mineral that is widely used in ceramics and polymer industries. Defect energetics, diffusion of Ca ions and a solution of dopants are studied using atomistic-scale simulation based on ...
Defect, transport, and dopant properties of andradite garnet Ca3Fe2Si3O12

Kuganathan, N.; Sashikesh, G.; Chroneos, A. (AIP, 2020)

There is growing interest to discover suitable calcium containing oxides that can be used as electrode materials in calcium ion batteries. A comprehensive computational investigation of ionic defects and Ca-ion diffusion ...
Defects, Diffusion, and Dopants in Li2Ti6O13: Atomistic Simulation Study

Kuganathan, N.; Sashikesh, G.; Chroneos, A. (MDPI, 2019)

In this study, force field-based simulations are employed to examine the defects in Li-ion diffusion pathways together with activation energies and a solution of dopants in Li2Ti6O13. The lowest defect energy process is ...
Defects, Dopants and Lithium Mobility in Li9V3(P2O7)3(PO4)2

Kuganathan, N.; Sashikesh, G.; Chroneos, A. (Scientific reports, 2018)

Layered Li9V3(P2O7)3(PO4)2 has attracted considerable interest as a novel cathode material for potential use in rechargeable lithium batteries. The defect chemistry, doping behavior and lithium difusion paths in ...
Encapsulation and Adsorption of Halogens into Single-Walled Carbon Nanotubes

Kuganathan, N.; Sashikesh, G. (MDPI, 2021)

Functionalisation of single-walled carbon nanotubes (SWNTs) with atoms and molecules has the potential to prepare charge–transfer complexes for numerous applications. Here, we used density functional theory with dispersion ...
Atomistic Model Approach to Identify Defects, Lithium Ion Diffusion and Trivalent Dopants in Li2MnO2

Kuganathan, N.; Sashikesh, G.; Abiman, P.; Chroneos, A. (Jaffna Science Association, 2019)

Layered lithium-rich metal oxides have attracted great interest as potential cathode materials for Li ion batteries due to their high Li content required for high energy density. Using atomistic simulation techniques ...
Synthesis and properties of bio-waste-based hydroxyapatite via hydrothermal process

Ng, C.K.; Ng, Z.L.; Ramesh, S.; Tan, C.Y.; Ting, C.H.; Chuah, Y.D.; Sutharsini, U. (University of Jaffna, 2020)

In this study, a facile hydrothermal method is applied to produce hydroxyapatite (HA) particles using egg shells as calcium precursors and fruit waste extracts (ba nana peel) as biomolecular templates at 150 °C for a ...

Now showing items 161-180 of 655

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