Research Repository

See what's under the surface


Formation of hollow carbon nanoshells from thiol stabilised silver nanoparticles via heat treatment (2018)
Journal Article
Watts, J. A., Fay, M. W., Rance, G. A., Brown, P. D., & Khlobystov, A. N. (2018). Formation of hollow carbon nanoshells from thiol stabilised silver nanoparticles via heat treatment. Carbon, 139, (538-544). doi:10.1016/j.carbon.2018.06.074. ISSN 0008-6223

Uniform, less 10 nm sized, hollow carbon nano-shells (HCNS) have been prepared via a single-step, thermal treatment of alkanethiol stabilised Ag nanoparticles (TS-AgNP). Direct evidence for the formation of spherical HCNS from TS-AgNP is provided by... Read More

Modelling and Characterisation of Electrical Discharge TiC-Fe Cermet Coatings (2018)
Journal Article
Algodi, S. J., Murray, J. W., Brown, P. D., & Clare, A. T. (2018). Modelling and Characterisation of Electrical Discharge TiC-Fe Cermet Coatings. Procedia CIRP, 68, 28-33. doi:10.1016/j.procir.2017.12.017

The creation of coatings via Electrical Discharge (ED) methods can enhance the functionality of components which are subject to prior ED machining process steps. However, the industrial application of these methods has been limited due to poor unders... Read More

Wear performance of TiC/Fe cermet electrical discharge coatings (2018)
Journal Article
Algodi, S. J., Murray, J. W., Brown, P. D., & Clare, A. T. (2018). Wear performance of TiC/Fe cermet electrical discharge coatings. Wear, 402-403, doi:10.1016/j.wear.2018.02.007. ISSN 0043-1648

The tribological behaviours of TiC-based cermet coatings, prepared by electrical discharge coating (EDC) using a semi-sintered TiC tool electrode, have been investigated. The as-deposited coatings exhibited complex microstructures, comprising TiC gra... Read More

Modelling of single spark interactions during electrical discharge coating (2017)
Journal Article
Algodi, S. J., Clare, A. T., & Brown, P. D. (2018). Modelling of single spark interactions during electrical discharge coating. Journal of Materials Processing Technology, 252, doi:10.1016/j.jmatprotec.2017.10.029. ISSN 0924-0136

Electrical discharge coating (EDC) methods may be used to enhance the surface functionality of electrical discharge machined components. However, industrial uptake of EDC has been restricted due to limited understanding of the fundamental interaction... Read More

An experimental study of the carbonation of serpentinite and partially serpentinised peridotites (2017)
Journal Article
Lacinska, A. M., Styles, M. T., Bateman, K., Hall, M., & Brown, P. D. (in press). An experimental study of the carbonation of serpentinite and partially serpentinised peridotites. Frontiers in Earth Science, 5, doi:10.3389/feart.2017.00037. ISSN 2296-6463

In situ sequestration of CO2 in mantle peridotites has been proposed as a method to alleviate the amount of anthropogenic CO2 in the atmosphere. This study presents the results of 8-month long laboratory fluid-rock experiments on representative mantl... Read More

Formation mechanism of electrical discharge TiC-Fe composite coatings (2016)
Journal Article
Murray, J., Algodi, S. J., Fay, M. W., Brown, P. D., & Clare, A. T. (in press). Formation mechanism of electrical discharge TiC-Fe composite coatings. Journal of Materials Processing Technology, 243, doi:10.1016/j.jmatprotec.2016.12.011. ISSN 0924-0136

Comparison of electric discharge (ED) processed single deposit and continuum TiC-Fe cermet coatings, formed from a sacrificial powder metallurgy TiC tool electrode at negative polarity, on 304 stainless steel, provided insight into the ED coating (ED... Read More

Electrical discharge coating of nanostructured TiC-Fe cermets on 304 stainless steel (2016)
Journal Article
Algodi, S. J., Murray, J. W., Fay, M. W., Clare, A. T., & Brown, P. D. (in press). Electrical discharge coating of nanostructured TiC-Fe cermets on 304 stainless steel. Surface and Coatings Technology, 307(Part A), doi:10.1016/j.surfcoat.2016.09.062

The electrical discharge coating (EDC) process, as used for the development of TiC-Fe cermet coatings on 304 stainless steel, has been investigated as a function of increasing current (2–19 A) and pulse-on time (2–64 μs). Coating morphologies, compri... Read More

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation (2016)
Journal Article
Lacinska, A. M., Styles, M. T., Bateman, K., Wagner, D., Hall, M. R., Gowing, C., & Brown, P. D. (2016). Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation. Chemical Geology, 437, doi:10.1016/j.chemgeo.2016.05.015. ISSN 0009-2541

Serpentine minerals serve as a Mg donor in carbon capture and storage by mineralisation (CCSM). The acid-treatment of nine comprehensively-examined serpentine polymorphs and polytypes, and the subsequent microanalysis of their post-test residues high... Read More

Direct visualization of the thermomagnetic behavior of pseudo-single-domain magnetite particles (2016)
Journal Article
Almeida, T. P., Muxworthy, A. R., Kovacs, A., Williams, W., Brown, P. D., & Dunin-Borkowski, R. E. (2016). Direct visualization of the thermomagnetic behavior of pseudo-single-domain magnetite particles. Science Advances, 2(4), doi:10.1126/sciadv.1501801. ISSN 2375-2548

The study of the paleomagnetic signal recorded by rocks allows scientists to understand Earth’s past magnetic field and the formation of the geodynamo. The magnetic recording fidelity of this signal is dependent on the magnetic domain state it adopts... Read More

Structural and electrical characterization of AuPtAlTi ohmic contacts to AlGaN/GaN with varying annealing temperature and Al content (2008)
Journal Article
Al content. Journal of Applied Physics, 103(7), doi:10.1063/1.2890978. ISSN 0021-8979

The effect of varying annealing temperature and Al layer thickness on the structural and electrical characteristics of AuPtAlTi/AlGaN/GaN ohmic contact structures has been systematically investigated. The relationship between annealing temperature, A... Read More

Nanoscale characterisation of MBE-grown GaMnN / (001) GaAs (2008)
Book
Fay, M. W., Han, Y., Novikov, S. V., Edmonds, K., Gallagher, B., Campion, R., …Brown, P. D. (2008). Nanoscale characterisation of MBE-grown GaMnN / (001) GaAs. In P. Midgley, & A. Cullis (Eds.), Microscopy of semiconducting materials 2007: proceedings of the 15th conference, 2-5 April 2007, Cambridge, UKSpringer-Verlag

The growth of cubic (Ga,Mn)N/(001)GaAs heterostructures by plasma assisted molecular beam epitaxy has been appraised as a function of Ga:N ratio, Mn concentration and growth temperature. The combined analytical techniques of EFTEM, EDX, CBED and dark... Read More

Structural characterisation of MBE grown zinc-blende Ga1-xMnxN/GaAs(001) as a function of Ga flux (2005)
Book
Ga1-xMnxN/GaAs(001) as a function of Ga flux. In J. Hutchison, & A. Cullis (Eds.), Microscopy of semiconducting materials: proceedings of the 14th conference: April 11-14, 2005, Oxford, UKSpringer-Verlag

Ga1-xMnxN films grown on semi-insulating GaAs(001) substrates at 680°C with fixed Mn flux and varied Ga flux demonstrated a transition from zinc-blende/wurtzite mixed phase growth for low Ga flux (N-rich conditions) to zinc-blende single phase growth... Read More

EBIC study of Au / n-type GaN Schottky contacts (2003)
Book
Moldovan, G., Harrison, I., & Brown, P. D. (2003). EBIC study of Au / n-type GaN Schottky contacts. In A. Cullis, & P. Midgley (Eds.), Microscopy of semiconducting materials 2003 : proceedings of the Institute of Physics conference, Cambridge University, 31 March - 3 April 2003IOP Publishing Ltd

The performance of Au / n-type GaN Schottky contacts is strongly dependent on the GaN surface processing prior to contacting. Current-voltage and EBIC line scans demonstrate that KOH treatment acts to degrade the Schottky contacts. EBIC imaging rev... Read More