title: Fabrication, characterisation and voltammetric studies of gold amalgam nanoparticle modified electrodes.
abstract: The tabrication, characterisation, and electroanalytical application of gold and gold amalgam nanoparticles on glassy carbon electrodes is examined. Once the deposition parameters for gold nanoparticle electrodes were optimised, the analytical utility of the electrodes was examined in CrIII electroanalysis. It was found that gold nanoparticle modified (Au-NM) electrodes possess higher sensitivity than gold macroelectrodes. In addition, gold amalgam nanoparticle modified (AuHg-NM) electrodes were fabricated and characterised. The response of those electrodes was recorded in the presence of important environmental analytes (heavy metal cations). It was found AuHg-NM electrodes demonstrate a unique voltammetric behaviour and can be applied for electroanalysis when enhanced sensitivity is crucial.
authors.affiliation: Physical and Theoretical Chemistry Laboratory, University of Oxford South Parks Road, Oxford, OX1 3QZ (UK).
authors.forename: Christine M
authors.initials: CM
authors.lastname: Welch
authors.forename: Olga
authors.initials: O
authors.lastname: Nekrassova
authors.forename: Xuan
authors.initials: X
authors.lastname: Dai
authors.forename: Michael E
authors.initials: ME
authors.lastname: Hyde
authors.forename: Richard G
authors.initials: RG
authors.lastname: Compton
mesh_terms: D002244:Carbon / Q000737:chemistry; D004563:Electrochemistry; D004566:Electrodes; D006047:Gold Alloys / Q000737:chemistry*; D008628:Mercury / Q000737:chemistry*; D049329:Nanostructures; D013499:Surface Properties
chemical_list: D006047:Gold Alloys; D002244:Carbon; D008628:Mercury