Chemistry Dept Research Groups - UC - Publications

Downard Electrochemistry and Surface Chemistry Research Group

The Downard Electrochemistry and Surface Chemistry Research Group Publications

Surface Patterning using Two-Phase Laminar Flow and In-Situ Formation of Aryldiazonium Salts.
Gross, A.J., Nock, V., Polson, M.I.J., Alkaisi, M.M., Downard, A.J. Angew. Chem. Int. Ed., 2013, 52, 10261-10264. http://dx.doi.org/10.1002/anie.201305024.

Mixed Monolayer Organic Films via Sequential Electrografting from Aryldiazonium Ion and Arylhydrazine Solutions.
Lee, L., Brooksby, P.A., Leroux, Y.R., Hapiot, P., Downard, A.J.  Langmuir, 2013, 29, 3133-3139. doi.org/10.1021/la400303x29

Patterned Forests of Vertically- Aligned Multiwalled Carbon Nanotubes Using Metal Salt Catalyst Solutions.
Garrett, D. J., Flavel, B.S., Baronian, K.H.R., Downard, A. J. J. Nanosci. Nanotechnol. 2013, 13, 728-731.

Mediated electrochemical detection of electron transfer from the outer surface of the cell wall of Saccharomyces cerevisieae.
Rawson, F.J., Gross, A.J., Garrett, D.J., Downard, A.J., Baronian, K.H.R. Electrochem. Commun. 2012, 15, 85-87. doi:10.1016/j.elecom.2011.11.030.

Electrochemical Investigations on a Third Generation Biosensor for Determination of Hydrogen Peroxide Based on Immobilization of Myoglobin on a Novel Platinum Nanoparticle/Carbon Nanotube/Ionic Liquid/Nafion Composite.
Babaei, A., Garrett, D.J., Downard, A.J. Int. J. Electrochem. Sci., 2012, 7, 3141 – 3154.

Investigating yeast cell responses to oestrogen by electrochemical detection.
Chelikani, V., Rawson, F.J., Downard, A.J., Gooneratne, R., Kunze, G., Pasco, N., Baronian, K.H.R.  Electrochim. Acta 2012, 73, 136– 140. DOI:10.1016/j.electacta.2011.11.078.

The stability of diazonium ion terminated films on glassy carbon and gold electrodes.
Lee, L., Brooksby, P.A., Downard, A.J.  Electrochem. Commun. 2012, 19, 67-69. DOI : 10.1016/j.elecom.2012.03.024

Glucose Biosensor at Ethylenediamine Modified Carbon Electrode.
Jarrar, H., Rolland, M., Downard, A.J., Cretin, M. Sensor Lett.  2011, 9, 2368-2370   DOI: 10.1166/sl.2011.1772.

HKUST-1 growth on glassy carbon.
Balakrishnan, S., Downard, A.J., Telfer, S.G.  J. Mater. Chem. 2011, 21, 19207 – 19209. DOI: 10.1039/C1JM13912F

Reproducible fabrication of robust, renewable vertically aligned multi-walled carbon nanotube/epoxy composite electrodes.
Garrett, D.J., Brooksby, P.A., Rawson, F.R., Baronian, K.H.R., Downard, A.J. Anal. Chem. 2011, 83, 8347-8351. DOI: 10.1021/ac201769t

Nickel(II) tetraphenylporphyrin modified surfaces via electrografting of an aryldiazonium salt.
Gross, A.J., Bucher, C., Coche-Guerente, L., Labbé, P., Downard, A.J., Moutet, J.-C. Electrochem. Commun. 2011, 13, 1236–1239. doi:10.1016/j.elecom.2011.08.035

Design of Robust Binary Film onto Carbon Surface using Diazonium chemistry.
Leroux, Y.R., Hui, F., Noël, J.-M., Roux, C., Downard, A.J., Hapiot, P. Langmuir, 2011, 27, 11222-11228. DOI: 10.1021/la202250y

A Voltammetric and Electrochemical Impedance Study of Ferrocenyl Containing b-Peptide Monolayers on Gold.
Brooksby, P.A., Anderson, K.H., Downard, A. J., Abell, A.D J. Phys. Chem. C. 2011, 115, 7516-7526.

Spontaneous Grafting of Nitrophenyl Groups to Planar Glassy Carbon Substrates: Evidence for Two Mechanisms.
Lehr, J., Williamson, B.E., Downard, A.J. 2011, 115, 6629–6634. DOI: 10.1021/jp111838r

Selective simultaneous determination of paracetamol and uric acid using a glassy carbon electrode modified with multi-walled carbon nanotube/chitosan composite.
Babaei, A., Garrett, D.J., Downard, A.J. Electroanalysis, 2011, 23, 417 – 423. DOI: 10.1002/elan.201000406

Regeneration of Pyrolyzed Photoresist Film by Heat Treatment.
Gross, A.J., Downard, A.J. Anal. Chem., 2011, 83, 2397–2402. DOI: 10.1021/ac103264v

Spontaneous Grafting of Nitrophenyl Groups to Planar Glassy Carbon Substrates: Evidence for Two Mechanisms.
Lehr, J., Williamson, B.E., Downard, A.J.J. Phys. Chem. C, 2011, 115, 6629–6634. DOI: 10.1021/jp111838r

Electrochemical detection of oestrogen binding protein interaction with oestrogen in Candida albicans cell lysate.
Chelikani, V., Rawson, F.J., Downard, A.J., Gooneratne, R., Kunze, G., Pasco, N. and Baronian, K.H.R., Biosensors and Bioelectronics, 2011, 26, 3737-3741. DOI:10.1016/j.bios.2011.01.016

Fig. 1. C. albicans whole cell and cell lysate responses in the presence and absence of 17β oestradiol (E) 10 nM using a double mediator system (ferricyanide and TMPD). The data points are the steady state currents obtained by LSV after 5 h incubation. Error bars represent ±1SD

Diazonium salt derivatives of osmium bipyridine complexes: electrochemical grafting and characterisation of modified surfaces.
Garrett, D.J., Jenkins, P., Polson, M.I.J., Leech D., Baronian, K.H.R., Downard, A.J., Electrochim. Acta., 2011, 56, 2213-2220.
DOI:10.1016/j.electacta.2010.11.070

Fig. 1 Structures of diazonium salts of osmium complexes and the precursor amine derivatives

Electron transfer from Proteus vulgaris to a covalently assembled, single walled carbon nanotube electrode, functionalised with osmium bipyridine complex: application to a whole cell biosensor.
Rawson, F.J., Garrett, D.J., Leech D., Downard, A.J., Baronian, K.H.R. Biosens. Bioelectron., 2011, 26, 2383–2389.
DOI:10.1016/j.bios.2010.10.016

Fig. 1: (A)Schematic diagram of the fabrication procedure for PPF-SWCNT-Osbpy electrodes and (B) AFM images of AP- and AP-SWCNT modified PPF

pH Dependent Wettability of Carboxyphenyl Films Grafted to Glassy Carbon, Packwood, D.M.; Brooksby, P.A.; Abell, A.D.; Downard, A.J. . Aust. J. Chem. 64, (2011) 122-126.

Figure 1. Plot showing the measured contact angle using water droplets at two CP films, each generated from electrolysis of 0.42 mM CBD + 0.1 M H2SO4 at 600 s. Each film was sonicated in pH buffered solutions sequentially from either low to high pH or the reverse. Closed and open circles indicate the direction of sampling.

Patterning of metal, carbon, and semiconductor substrates with thin organic films by microcontact printing with aryldiazonium salt inks.
Lehr, J., Garrett, D.J., Paulik, M.G., Flavel, B.S., Brooksby, P.A., Williamson, B.E., and Downard, A.J.
Anal. Chem. 2010, 82, 7027–7034.

Vertically-aligned carbon nanotubes patterned on a carbon film

Two-component mixed and patterned films on carbon surfaces through photografting of arylazides
Gross, A.J., Yu, S.S.C. and Downard, A.J.
Langmuir, 2010, 26, 7285-7292.
DOI: 10.1021/la904442u

Two-component mixed and patterned films on carbon surfaces through photografting of arylazides

Dependence of Catalytic Activity and Long-term Stability of Enzyme Hydrogel Films on Curing Time
Lehr, J., Williamson, B.E., Barrière, F. and Downard, A.J. Bioelectrochem., 2010, 79, 142–146.
DOI:10.1016/j.bioelechem.2009.12.004

Dependence of Catalytic Activity and long-term stability of enzyme hydrogel films on curing time

Chemically Immobilised Carbon Nanotubes on Silicon: Stable Surfaces for Aqueous Electrochemistry.
Flavel, B.S., Garrett, D.J., Lehr, J., Shapter, J.G. and Downard, A.J. Electrochim. Acta, 2010, 55, 3995–4001.

Chemically Immobilised Carbon Nanotubes on Silicon: Stable Surfaces for Aqueous Electrochemistry

A Simple Approach to Patterned Protein Immobilisation on Silicon via Electrografting from Diazonium Salt Solutions.
Flavel, B.S., Gross, A.J., Garrett, D.J., Nock, V. and Downard, A.J. ACS Appl. Mater. Interfaces, 2010, 2, 1184–1190.
DOI: 10.1021/am100020a

A Simple Approach to Patterned Protein Immobilisation on Silicon via Electrografting from Diazonium Salt Solutions

Electrochemistry of Ferrocenyl b-Peptide Monolayers on Gold.
Brooksby, Paula A., Anderson, Kelly H., Downard, Alison J., Abell, Andrew D. Langmuir, 2010, 26, 1334-1339.

Electrochemistry of ferrocenyl B-peptide monolayers on gold

Robust Forests of Vertically Aligned Carbon Nanotubes Chemically Assembled on Carbon Substrates.
Garrett, David J., Flavel, Benjamin S., Shapter, Joseph G., Baronian, Keith H. R., Downard, Alison J. Langmuir, 2010, 26, 1848-1854.

Robust Forests of Vertically Aligned Carbon Nanotubes

Reaction of Gold Substrates with Diazonium Salts in Acidic Solution at Open-Circuit Potential.
Lehr, Joshua, Williamson, Bryce E., Flavel, Benjamin S., Downard, Alison J. Langmuir  2009, 25(23), 13503-13509.

Reaction of Gold Substrates with Diazonium Salts in Acidic Solution

Electrochemical stability of citrate-capped gold nanoparticles electrostatically assembled on amine-modified glassy carbon.
Cruickshank A.C. and Downard A.J. Electrochim. Acta, 2009, v54, 5566-5570.

Electrochemical stability of citrate-capped gold nanoparticles electrostatically assembled on amine-modified glassy carbon

Direct growth of vertically aligned carbon nanotubes on planar carbon substrates by thermal chemical vapour deposition.
Liu X., Baronian, K.H.R. and Downard, A.J. Carbon, 2009, v47, 500 - 506.

Direct growth of vertically aligned carbon nanotubes on planar carbon substrates by thermal chemical vapour deposition

Perfluorosulfonated Ionomer-Modified Diffusive Gradients in Thin Films: Tool for Inorganic Arsenic Speciation Analysis.
Panther, J.G., Stillwell, K.P., Powell, K.J. and Downard, A.J.Anal. Chem., 2008, v80, 9806–9811.

Perfluorosulfonated Ionomer-Modified Diffusive Gradients in Thin Films: Tool for Inorganic Arsenic Speciation Analysis

Patterned arrays of vertically aligned carbon nanotube microelectrodes on carbon films prepared by thermal chemical vapour deposition.
Liu X., Baronian, K.H.R. and Downard, A.J. Anal. Chem., 2008, v80, 8835–8839.

Patterned arrays of vertically aligned carbon nanotube microelectrodes on carbon films prepared by thermal chemical vapour deposition

Development and application of the diffusive gradients in thin films technique for the measurement of total dissolved inorganic arsenic in waters.
Panther, J.G., Stillwell, K.P., Powell, K.J. and Downard, A.J. Anal. Chim. Acta, 2008, v622, 133-142.

 Development and application of the diffusive gradients in thin films technique for the measurement of total dissolved inorganic arsenic in waters

Exploration of Variables in the Fabrication of Pyrolysed Photoresist.
Fairman, C., Yu, S.S.C., Guozhen, L., Downard, A.J., Hibbert, D.B. and Gooding, J.J. J. Solid State Electrochem., 2008, v12, 1357-1365.

Exploration of Variables in the Fabrication of Pyrolysed Photoresist

Modification of Graphitic Carbon Substrates by Non-Electrochemical Methods.
Barrière, F. and Downard, A.J. Covalent J. Solid State Electrochem., 2008, v12, 1231–1244. Invited article for special issue on carbon electrochemistry.
DOI: 10.1007/s10008-008-0526-2

 Modification of Graphitic Carbon Substrates by Non-Electrochemical Methods

Improved stability of redox enzyme layers on glassy carbon electrodes via covalent grafting.
Pellissier, M., Barrière, F., Downard, A.J. and Leech, D. Electrochem. Commun., 2008, v10, 835–838.

Improved stability of redox enzyme layers on glassy carbon electrodes via covalent grafting

Microcontact printing using the spontaneous reduction of aryldiazonium salts.
Garrett, D.J., Lehr, J., Miskelly, G.M., Downard, A.J. Source: Journal of the American Chemical Society Volume: 129 Issue: 50 Pages: 15456-+ Published: DEC 19 ~2007.

Microcontact printing using the spontaneous reduction of aryldiazonium salts

Reversible photoregulation of binding of alpha-chymotrypsin to a gold surface.
Pearson, D., Downard, A.J., Muscroft-Taylor, A., et al. Source: Journal of The American Chemical Society Volume: 129 Issue: 48 Pages: 14862-+  Published: DEC 5 ~2007.

Reversible photoregulation of binding of alpha-chymotrypsin to a gold surface

An electrochemical and XPS study of reduction of nitrophenyl films covalently grafted to planar carbon surfaces.
Yu, S.S.C., Tan, E.S.Q., Jane, R.T., Downard, A.J. Source: LANGMUIR Volume: 23 Issue: 22 Pages: 11074-11082 Published: OCT 23 ~2007.

An electrochemical and XPS study of reduction of nitrophenyl films covalently grafted to planar carbon surfaces

SECM imaging of micropatterned organic films on carbon surfaces.
Zigah, D., Pellissier, M., Barriere, F., Downard, A.J., Haplot, P. Source: Electrochemistry Communications Volume: 9 Issue: 9 Pages: 2387-2392 Published: SEP ~2007.

Are redox probes a useful indicator of film stability? An electrochemical, AFM and XPS study of electrografted amine films on carbon.
Cruickshank, A.C., Tan, E.S.Q., Brooksby, P.A., Downard, A.J. Source: Electrochemistry Communications Volume: 9 Issue: 7 Pages: 1456-1462 Published: JUL ~2007.

Are redox probes a useful indicator of film stability? An electrochemical, AFM and XPS study of electrografted amine films on carbon

Grafting aryl diazonium cations to polycrystalline gold: Insights into film structure using gold oxide reduction, redox probe electrochemistry, and contact angle behavior.
Paulik, M.G., Brooksby, P.A., Abell, A.D., Downard, A.J. Source: Journal of Physical Chemistry C  Volume: 111 Issue: 21 Pages: 7808-7815 Published: MAY 31 ~2007.

Grafting aryl diazonium cations to polycrystalline gold: Insights into film structure using gold oxide reduction, redox probe electrochemistry, and contact angle behavior

Photochemical Grafting and Activation of Organic Layers on Glassy Carbon and Pyrolyzed Photoresist Films.
Yu, S.S.C., Downard, A.J. Langmuir, 2007, v23, 4662-4668.

Organic films have been grafted to polished glassy carbon (GC) and as-prepared pyrolyzed photoresist film (PPF) by photolysis of alkenes and an alkyne

A Novel Technique for Characterizing the Surface of Natural Fibres.
Pietak, A., Korte, S., Tan, E.S.Q., Downard A.J. and Staiger, M.P. Appl. Surf. Sci., 2007, v253, 3627-3635.

A Novel Technique for Characterizing the Surface of Natural Fibres

Microscale Patterning of Organic Films on Carbon Surfaces Using Electrochemistry and Soft Lithography
Downard, A.J., Garrett, D.J. and Tan, E.S.Q. , Langmuir, 2006, v22, 10739 - 10746.

Microscale Patterning of Organic Films on Carbon Surfaces Using Electrochemistry and Soft Lithography

Olefin Cross-Metathesis of a Vinyl-Terminated Self-Assembled Monolayer (SAM) on Au(111): Electrochemical Study Using a Ferrocenyl Redox Center
Brooksby, P.A., Anderson, K.H., Downard, A.J., Abell, A.D., Langmuir, 2006, v22, 9304 - 9312.

Olefin Cross-Metathesis of a Vinyl-Terminated Self-Assembled Monolayer (SAM) on Au(111): Electrochemical Study Using a Ferrocenyl Redox Center

Controlled Assembly of Gold Nanoparticles on Carbon Surfaces
Downard, A.J., Tan, E.S.Q. and Yu, S.S.C. New J. Chem., 2006, v30 , 1283-1288.

Controlled Assembly of Gold Nanoparticles on Carbon Surfaces

Dynamic Behavior of Organic Thin Films Attached to Carbon Surfaces
Yu, S.S.C. and Downard, A.J. e- J. Surf. Sci. Nanotech., v3, 2005, 294-298

Dynamic Behavior of Organic Thin Films Attached to Carbon Surfaces

Effect of Applied Potential on Arylmethyl Films Oxidatively Grafted to Carbon Surfaces.
Brooksby, P.A., Downard, A.J. and Yu, S.S.C. Langmuir, v21, 2005, 11304-11311.

Effect of Applied Potential on Arylmethyl Films Oxidatively Grafted to Carbon Surfaces

Multilayer Nitroazobenzene Films Covalently Attached to Carbon. An AFM and Electrochemical Study
Brooksby, P.A. and Downard, A.J. J. Phys. Chem. B., v109, 2005, 8791–8798.

Multilayer Nitroazobenzene Films Covalently Attached to Carbon. An AFM and Electrochemical Study

Fluorescence microscopy study of protein adsorption at modified glassy carbon surfaces
Downard, A.J., Jackson, S.L. and Tan, E.S.Q. Aust. J. Chem., v58, 2005, 275-279.

Fluorescence microscopy study of protein adsorption at modified glassy carbon surfaces

Nanoscale Patterning of Flat Carbon Surfaces by Scanning Probe Lithography and Electrochemistry.
Brooksby, P.A. and Downard, A.J. Langmuir, v21, 2005, 1672-1675.

Nanoscale Patterning of Flat Carbon Surfaces by Scanning Probe Lithography and Electrochemistry

Dimetallic complexes of acyclic pyridine-armed ligands derived from 3,6-diformylpyridazine
Plieger, P.G., Downard, A.J., Moubaraki, B., Murray, K.S. and Brooker, S. J. Chem. Soc., Dalton Trans., 2004, 2157-65.

 Graphical abstract: Dimetallic complexes of acyclic pyridine-armed ligands derived from 3,6-diformylpyridazine

Electrochemical and atomic force microscopy study of carbon surface modification via diazonium reduction in aqueous and acetonitrile solutions
Brooksby, P.A. and Downard, A.J. Langmuir, v20, 2004, 5038-45.

Electrochemical and atomic force microscopy study of carbon surface modification via diazonium reduction in aqueous and acetonitrile solutions

Lability of metal ion-fulvic acid complexes as probed by FIA and DGT: a comparative study
Downard, A.J., Panther, J., Kim, Y.-C. and Powell, K.J. . Anal. Chim. Acta, v499, 2003, 17-28.

 Schematic diagram showing the resin (Chelex-100) gel and diffusive gel layer (thickness Δg) of the DGT device, and the concentration gradients through the diffusive gel for inert, labile, and free metal ions. The arrows represent the dissociation of labile complexes to generate the free metal ion concentration indicated

Electrochemistry of ferrocenylphosphines FcCH 2 PR 2 (Fc = (η 5 -C 5 H 5 )Fe(η 5 -C 5 H 4 ); R = Ph, CH 2 OH and CH 2 CH 2 CN), and some phosphine oxide, phosphine sulfide, phosphonium and metal complex derivatives
Downard, A.J., Goodwin, N.J. and Henderson, W. J. Organomet. Chem., v676, 2003, 62-72.

 

Detection of two distinct substrate-dependent catabolic responses in yeast cells using a mediated electrochemical method
Baronian, K.H.R., Downard, A.J., Lowen, R.K. and Pasco , N . Appl. Microbiol. Biotechnol., v 60, 2002, 108-13.

 

Barrier properties of organic monolayers on glassy carbon electrodes
Downard, A.J. and Prince, M.J. Langmuir, v17, 2001, 5581-6.

 

Potential-dependence of self-limited films formed by reduction of aryldiazonium salts at glassy carbon electrodes
Downard, A.J. Langmuir, v16, 2000, 9680-2.

 

Electrochemically assisted covalent modification of carbon electrodes.
Downard, A.J. Electroanalysis, v12, 2000, 1085-96.

 

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