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Browsing Faculty of Science by Author "Abiman, P."

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Adsorption of lead on the surfaces of pristine and B, Si and N-doped graphene

Kuganathan, N.; Anurakavan, S.; Abiman, P.; Iyngaran, P.; Gkanas, E.I.; Chroneos, A. (University of Jaffna, 2020)

The efficacy of graphene and graphene doped with B, Si and N surfaces for the removal of Pb atom is examined by utilising density functional theory calculations. The results show that the binding energy of a single Pb ...
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 ...
Building Block Syntheses of Gallic Acid Monomers and Tris-(O-gallyl)-gallic Acid Dendrimers Chemically Attached to Graphite Powder: A Comparative Study of Their Uptake of Al (III) Ions

Ye , J.; Abiman, P.; Crossley, A.; Jones, J.H.; Wildgoose, G.G.; Richard, G. (American Chemical Society, 2009-09-24)

A synthesis of graphite powder covalently modified with gallic acid (3,4,5-trihydroxybenzoic acid), via a 1,2-diaminoethane “linker” molecule, to form gallylaminoethylaminocarbonyl graphite (gallic-carbon) is reported. The ...
Cadmium trapping by C60 and B-, Si-, and N-doped C60

Kuganathan, N.; Selvanantharajah, N.; Iyngaran, P.; Abiman, P.; Chroneos, A. (University of Jaffna, 2019)

The removal of heavy metals from the environment has attracted considerable attention as they are toxic and non-biodegradable or destroyable. To minimize their hazard, they should be removed through either physical or ...
Characterising chemical functionality on carbon surfaces

Wildgoose, G.G; Abiman, P.; Compton, R.G (The Royal Society of Chemistry, 2009-07-28)

This feature article introduces the reader to the surface chemistry and structure of graphitic carbon materials, including carbon nanotubes. Recent work involving the development of dual labels that allow us to selectively ...
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 ...
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.; Gregory, G.; Wildgoose, G.G.; Crossley, A.; John, J.H.; Richard, G. (Issue, 2007-11-26)

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 potentiometric 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 ...
Investigating the Mechanism for the Covalent Chemical Modification of Multiwalled Carbon Nanotubes Using Aryl

Abiman, P.; Gregory, G.; Wildgoose; Richard, G.; Compton. (Physical and Theoretical Chemistry Laboratory,, 2007-12-20)

The mechanism involved in the modification of carbon nanotubes (CNTs) funtionalised using diazonium salts has been investigated. Bamboo-like and hollow-tube multiwalled carbon nanotubes (MWCNTs) were covalently modified ...
Investigating the reactive sites and the anomalously large changes in surface pKa values of chemically modified carbon nanotubes of different morphologies

Masheter, A.T; Abiman, P.; Wildgoose, G.G; Wong, E; Xiao, L; Rees, N.V; Taylor, R; Attard, G.A; Baron, R; Crossley, A; Jones, J.H; Compton, R.G (The Royal Society of Chemistry, 2007)

"Bamboo-like" multiwalled (b-MWCNT), "hollow-tube" multiwalled (h-MWCNT) and single-walled carbon nanotubes (SWCNT), chemically modified with 1-anthraquinonyl (AQ) or 4-nitrophenyl (NP) groups, are characterized using ...
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 ...
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 ...
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 ...
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 ...

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