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DST Seminar: Nitrogen aggregation in diamond - Matthew Dale, De Beers Technologies

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1-2pm Monday 26th November
Materials & Analytical Sciences 2.06

Nitrogen is the most commonly identified impurity in diamond. When diamond is annealed with sufficient temperature, various species become mobile and single nitrogen substitutional atoms aggregate into larger complexes. Understanding and controlling this process is significant to engineering defects into diamond, such as the nitrogen-vacancy centre, as well as understanding the differences between natural and synthetic diamond. Irradiation prior to annealing increases the aggregation rate; this is caused by both vacancies and interstitials mediating the mobility of nitrogen. In this presentation I will talk about the migration of vacancies and interstitials and their role in enhancing the aggregation process. I will highlight differences between aggregation in natural, HPHT and CVD grown diamond. Finally, I will explain how these differences can be used to effectively distinguish natural from synthetic diamond and their use in De Beers’ screening instruments.

Tue 20 Nov 2018, 12:35 | Tags: Seminar

DST Seminar: Story of a Puzzle: Another Facet of Diamond - Gwenaelle Lefeuvre, Micronsemiconductor Ltd

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2pm - 3pm, Wednesday 21st November
Materials & Analytical Sciences (MAS 2.06)

Although its optical properties are those most often cited and even revered, diamond also possesses characteristics that extend its field of application well beyond luxury jewellery.

This presentation focuses in particular on the electronic properties of diamonds, thanks to which Micron Semiconductor manufactures radiation sensors for applications as diverse as particle physics, space exploration, energy or medical diagnostics.

After an introduction on artificial diamond and its various uses, we will explore the steps involved in manufacturing a sensor and examine current and future applications in this sector.

Mon 12 Nov 2018, 16:10 | Tags: Seminar

DST CDT at the 2018 GIA Symposium

Gloria Zhao (Cohort 3) and Phil Diggle (Cohort 1), along with Prof. Mark Newton, were invited to attend the 2018 Gemological Institute of America (GIA) International Gemological Symposium. Phil delivered a talk on how to image diamond down the diffraction limit using confocal photoluminescence microscopy and how this has revealed new insights on the growth of synthetic diamond. Gloria gave a talk on phosphorescence and thermoluminescence of diamond. Both talks were very well received by the 200-plus audience members in the morning session of the first day of the symposium. The remainder of the first day saw talks from leading researchers in their field of diamond science from the synthesis, characterisation and the geology of diamond.

Mon 29 Oct 2018, 11:09 | Tags: StudentNews

DST Seminar: CVD diamond for optical applications - Dr Ian Friel Principal Scientist, Element Six

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2-3pm Wednesday 7th November
Materials & Analytical Sciences 2.06

Chemical vapour deposition (CVD) is a well-established and robust method of diamond synthesis. The versatility of CVD enables a high degree of control over the formation of point and extended defects in diamond. This allows a range of single crystal and polycrystalline diamond grades to be engineered for specific applications. As an optical material, CVD diamond can provide solutions for extremely demanding applications. In this talk we review the key optical properties of CVD diamond and how these can be influenced by synthesis conditions. A range of optical applications will be presented, which harness diamond’s properties to enable performance beyond the capability of conventional optical materials.

Fri 26 Oct 2018, 10:25 | Tags: Seminar

DST Seminar: Qubits in diamond: towards new technologies and new physics (Gavin Morley)

11am - 12pm Wednesday 10th October
Materials & Analytical Sciences 2.06
Tue 02 Oct 2018, 15:16 | Tags: Seminar

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