Dr Sam Cobb

Postdoctoral Scientist, University of Cambridge
Email: sc2201 at cam dot ac dot uk

PhD Title: Development of Smart Diamond Windows for Electrochemical Sensing in Real Environments
PhD Supervisor: Prof. Julie Macpherson
PhD Institution: University of Warwick

Publications

Sam Cobb (cohort 1, Warwick), Fraser Laidlaw (cohort 3, Warwick): Assessment of acid and thermal oxidation treatments for removing sp2 bonded carbon from the surface of boron doped diamond Samuel J. Cobb, Fraser H.J. Laidlaw, Geoff West, Georgia Wood, Mark E. Newton, Richard Beanland, Julie V. Macpheron - Published April 2020 https://doi.org/10.1016/j.carbon.2020.04.095

Sp² Carbon Edge Effects on the Electrode Kinetics of the Ferrocene/Ferricenium Process in an Ionic Liquid at a Boron Doped Diamond Electrode, Jiezhen Li, Cameron L. Bentley, Sze-yin Tan, Venkata Mosali, Anisur Rahman, Samuel J. Cobb, Si-Xuan Guo, Julie V. Macpherson, Patrick R. Unwin, Alan M. Bond, Jie Zhang. Journal of Physical Chemistry C, 2019, 123, 28, 17397-17406, DOI: 10.1021/acs.jpcc.9b04519

Enhancing Square Wave Voltammetry Measurements via Electrochemical Analysis of the Non-Faradaic Potential Window. Samuel J. Cobb and Julie V. Macpherson. Analytical Chemistry, 91, 12, 9345-9342. DOI: 1021/acs.analchem.9b01857

An sp² Patterned Hybrid Boron Doped Diamond Electrode for the Simultaneous Detection of Dissolved Oxygen and pH. Tania L. Read, Samuel J. Cobb and Julie V. Macpherson, ACS Sensors, 2019, 4, 3, 756-763. DOI: 10.1021/acssensors.9b00137

Deconvoluting surface-bound quinone proton coupled electron transfer in unbuffered solutions: towards a universal voltammetric pH electrode. Samuel J. Cobb, Zoe J. Ayres, Mark E. Newton, and Julie V. Macpherson, Journal of the American Chemical Society, 2019, 141, 2, 1035-1044. DOI: 10.1021/jacs.8b11518

Facet-resolved electrochemistry of polycrystalline boron-doped diamond electrodes: microscopic factors determining the aqueous solvent window in aqueous potassium chloride solution. Dan-Qing Liu, Chang-Hui Chen, David Perry, Geoff West, Sam J. Cobb, Julie V. Macpherson and Patrick R. Unwin. ChemElectroChem 2018, 5, 20, 3028-3035. DOI: 10.1002/celc.201800770

Boron Doped Diamond: A Designer Electrode Material for the Twenty-First Century. Samuel J. Cobb, Zoë J. Ayres, Julie V. Macpherson. Annual Reviews of Analytical Chemistry, 2018, 11, 20 DOI: 10.1146/annurev-anchem-061417-010107

Quinone electrochemistry for the comparitive assessment of sp² surface content of boron doped diamond electrodes. Zoë J. Ayres, Sam J. Cobb, Mark E. Newton and Julie. V. Macpherson. Electrochemistry Communications, 2016, 72, 59-63 DOI: 10.1016/j.elecom.2016.08.024

Dr Phil Diggle

Research Scientist, De Beers Technologies
Email: phildiggle at physics dot org

LinkedIn

 @phildiggle

Phil has been appointed Research Scientist at De Beers Technologies (November 2018).

PhD Title: Single Defect Imaging Studies in Diamond
PhD Supervisor: Prof. Mark Newton
PhD Institution: University of Warwick

Publications

D. Howell, A. Collins, L. Loudin, P. L. Diggle, U. D’Haenens-Johansson, K. Smit, A. Katrusha, J. Butler, F. Nestola, Automated FTIR mapping of boron distribution in diamond, Diamond and Related Materials 96, 207–215 (2019) 10.1016/j.diamond.2019.02.029

C. J. Stephen, B. L. Green, Y. N. D. Lekhai, L. Weng, P. Hill, S. Johnson, A. C. Frangeskou, P. L. Diggle, M. J. Strain, E. Gu, M. E. Newton, J. M. Smith, P. S. Salter, G. W. Morley. Three-dimensional solid-state qubit arrays with long-lived spin coherence, arXiv:1807.03643

Joseph Durk

Element Six

PhD Title: Spectroscopy studies of Polycrystalline Cubic Boron Nitride Materials (cBN) to build Behaviour Models in selected Precision Machining Applications
PhD Supervisor: Prof. Andy Evans
Institution: Aberystwyth University

Dr Branislav Dzepina

Application Engineer, Imperial College London
Email: branislav dot dzepina at e6 dot com

Brani recently (October 2018) started working as an Application Engineer in the Road and Mining Business Unit at Element Six.

PhD Title: The computational study of high-pressure, high-temperature sintering of polycrystalline diamond
PhD Supervisor: Dr. Daniele Dini & Dr. Daniel Balint
PhD Institution: Imperial College London

Publications

Lukasz Dziechciarczyk

M Squared

PhD Title: Diamond Lasers: The Direct use of Diamond
PhD Supervisor: Prof. Alan Kemp
Institution: University of Strathclyde

Publications

Dr Paul Hill

Research Associate, University of Strathclyde
Email: paul dot hill at strath dot ac dot uk

Paul is now a Post-Doctoral Research Associate in the Biomedical Engineering Department, University of Strathclyde.

PhD Title: Heterogeneous integration of diamond photonic devices on non-native substrates
PhD Supervisor: Dr. Erdan Gu & Dr. Michael Strain
PhD Institution: University of Strathclyde

Publications

All-optical tuning of a diamond micro-disk resonator on silicon, Hill Paul, Klitis Charalambos, Guilhabert Benoit, Sorel Marc, Gu Erdan, Dawson Martin D, Strain Michael J, Photonics Research Vol 8, pp. 318-324 (2020). https://doi.org/10.1364/PRJ.372358

Deep Three-Dimensional Solid-State Qubit Arrays with Long-Lived Spin Coherence, C. J. Stephen, B. L. Green, Y. N. D. Lekhai, L. Weng, P. Hill, S. Johnson, A. C. Frangeskou, P. L. Diggle, Y.-C. Chen, M. J. Strain, E. Gu, M. E. Newton, J. M. Smith, P. S. Salter, and G. W. Morley, Phys. Rev. Applied 12, (2019). https://doi.org/10.1103/PhysRevApplied.12.064005

Thin film diamond membranes bonded on-demand with SOI ring resonators, Hill Paul, Gu Erdan, Dawson Martin D, Strain Michael J, Diamond and Related Materials Vol 88, pp. 215-221 (2018). https://doi.org/10.1016/j.diamond.2018.07.020

Micro-assembly of hybrid diamond-Si resonator devices, Hill Paul D, Gu Erdan, Strain Michael, Advanced Photonics Congress - Integrated Photonics Research, Silicon, and Nano-Photonics 2018 (2018). https://doi.org/10.1364/IPRSN.2018.ITh2J.5

Dr Ed Mahoney

PhD Title: Understanding microwave-activated hydrogen(/methane/silane)-containing plasmas through optical diagnostic techniques
PhD Supervisor: Prof. Mike Ashfold
PhD Institution: University of Bristol

Dr Callum Middleton

Materials Engineer, Compound Semiconductor Applications Catapult
Email: Callummiddleton9 at hotmail dot co dot uk

PhD Title: Diamond and Diamond-GaN Integration: Thermal Challenges
PhD Supervisor: Prof. Martin Kuball
PhD Institution: University of Bristol

Publications

R. Kabouche, R. Pecheux, K. Harrouche, E. Okada, F. Medjdoub, J. Derluyn, S. Degroote, M. Germain, F. Gucmann, C. Middleton, J. Pomeroy, M. Kuball, High Efficiency AlN/GaN HEMTs for Q-Band Applications with an Improved Thermal Dissipation, International Journal of High Speed Electronics and Systems 28 (01n02), (2019).

C. Middleton, S. Dalcanale, J. Pomeroy, M. Uren, J. Chang, J. Parke, I. Wathuthanthri, K. Nagamatsu, S. Saluru, S. Gupta, R. Howell, M. Kuball, Thermal Transport in Superlattice Castellated Field Effect Transistors, IEEE Electron Device Letters 40 (9), 1374-1377 (2019)

C. Middleton, H. Chandrasekar, M. Singh, J. Pomeroy, M. Uren, D. Francis, M. Kuball, Impact of thinning the GaN buffer and interface layer on thermal and electrical performance in GaN-on-diamond electronic devices, Applied Physics Express 12 (2), (2019).

J. Pomeroy, C. Middleton, M. Singh, S. Dalcanale, M. Uren, M. Wong, K. Sasaki, A. Kuramata, S. Yamakoshi, M. Higashiwaki, M. Kuball, Raman Thermography of Peak Channel Temperature in β-Ga₂O₃ MOSFETs, IEEE Electron Device Letters 40 (2), 189-192 (2018).

S. Mandal, E. L. H. Thomas, C. Middleton, L. Gines, J. T. Griffiths, M. J. Kappers, R. A. Oliver, D. J. Wallis, L. E. Goff, S. A. Lynch, M. Kuball, O. A. Williams. Surface Zeta Potential and Diamond Seeding on Gallium Nitride Films, ACS Omega, (2017), 2, 7275-7280. doi: 10.1021/acsomega.7b01069

D. Liu, D. Francis, F. Faili, C. Middleton, J. Anaya, J. Pomeroy, D. Twitchen, M. Kuball. Impact of Diamond Seeding on the Microstructural Properties and Thermal Stability of GaN-on-Diamond Wafers for High-Power Electronic Devices, Scripta Materialia, (2017), 128, 57-60. doi: 10.1016/j.scriptamat.2016.10.006

Enrik Nako

PhD Title: Hydrogen in diamond: Defects and Diffusion
PhD Supervisor: Prof. Mark Newton
PhD Institution: University of Warwick

Dr Ben Reed

Higher Research Scientist, National Physics Laboratory
E-mail: Benjamen.reed@npl.co.uk

Benjamen is currently a Higher Research Scientist in the Surface Technology group at the National Physical Laboratory (NPL) (since October 2018). Benjamen’s research includes with X-ray photoelectron spectroscopy (XPS) metrology; developing standardised procedures of XPS measurement, calibration, and analysis; and the characterisation of graphene with photoelectron techniques. Benjamen has organised interlaboratory studies with the Versailles Project on Advanced Materials and Standards (VAMAS) under the auspices of the Surface Chemical Analysis technical working area (TWA 2).

PhD Title: Developments in the Catalytic Graphitisation of Diamond and Silicon Carbide Surfaces
PhD Supervisor: Prof. Andy Evans
PhD Institution: Aberystwyth University

Guy Stimpson

Arden Photonics

Publications

G. A. Stimpson, M. S. Skilbeck, R. L. Patel, B. L. Green, and G. W. Morley, An open-source high-frequency lock-in amplifier, Review of Scientific Instruments 90, 094701 (2019); https://doi.org/10.1063/1.5083797