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DST Seminar: An appraisal of photoluminescence studies of TEM irradiated diamond and SiC

John Steeds
Department of Physics, University of Bristol

12pm Friday 6th December
Materials & Analytical Sciences 2.06

It is now exactly 20 years since we started to study diamond by photoluminescence microscopy after irradiation in a transmission electron microscope. I will explain the motivation for this approach, how it has developed, some of the lessons we have learned, draw attention to its particular strengths and highlight some of its achievements.

John is an Emeritus Professor of Physics at the University of Bristol. He is well known for his investigations of the microstructure of materials using electron microscopy/diffraction. Early in his career, he produced seminal work on dislocation arrangements in deformed copper crystals, which is a basis for the more recent theories of work hardening. More recently he has turned his attention to defects in wide-bandgap semiconductors. He was elected a Fellow of the Royal Society in 1988. In 1996, he received the Holweck Prize, awarded jointly by the Institute of Physics and Société Française de Physique.

Wed 20 Nov 2019, 11:16 | Tags: Seminar

DST Seminar: A geologist’s view of the origin of diamond

Jeff Harris
School of Geographical and Earth Services, University of Glasgow

10am Wednesday 4th December
Materials & Analytical Sciences 2.06

Jeff’s research centres on diamond in particular the syngenetic mineral inclusion content and the physical and chemical characteristics of the host. When the geochemistry of the inclusions is combined with the physical characteristics of the diamond, detailed information is obtained about the different environments of diamond formation in both the upper and, more recently, the lower mantle. From inclusions, both the genesis and eruption ages of diamond can be determined. Jeff will give an overview of the origin of diamond in the earth.

Jeff is an Honorary Research Fellow, School of Geographical and Earth Sciences, University of Glasgow, Honorary Professor, Institute für Mineralogie, Johann Wolfgang Goethe – University of Frankfurt, Germany and an Adjunct Professor, Department of Earth and Atmospheric Sciences, University of Alberta, Canada. He was also a consultant to De Beers Consolidated Mines for over 30 years, managing their worldwide outside diamond research programmes conducted at Universities and equivalent institutions; a research endeavour which played a major part in furthering the understanding of geochemical processes operating in the mantle.

Wed 20 Nov 2019, 11:10 | Tags: Seminar

DST Seminar: A Journey Across the Sciences: Applications of X-ray Photoelectron Spectroscopy

Dr Marc Walker
Department of Physics, University of Warwick

2-3pm Wednesday 27th February
Materials & Analytical Sciences 2.06

X-ray photoelectron spectroscopy (XPS) is a powerful surface analysis technique capable of probing the elemental composition and chemistry of the surface of materials. XPS utilises the photoelectric effect and has led to two Nobel Prizes in Physics, Albert Einstein (1921) and Kai Siegbahn (1981). Originally largely rooted in fundamental surface science, the technique has gained popularity as a powerful surface analytical tool in a variety of different fields, leading to over 10000 publications per year in recent years. Here we highlight just a few of the branches of modern science to which XPS has been applied at the Warwick Photoemission Facility, going on a journey across the sciences from biology to space science via a series of interesting multi-technique case studies, including a particular focus on carbon-based materials such as graphene and diamond. The presentation will also highlight the equipment portfolio of the XPS Facility and outline how to access the instruments.

Mon 18 Feb 2019, 11:00 | Tags: Seminar

DST Seminar: Opportunities for additive manufacturing in device fabrication

Dmitry Isakov
2pm - 3pm, Thursday 14th February
Materials & Analytical Sciences (MAS 2.06)
Additive manufacturing (aka 3D printing) is invading more and more space in our everyday life. And now, a decade after the first desktop 3D printer appeared to be available for enthusiasts, we can hear about the first models of desktop 3D printers that print metals. And this is just the beginning.
In today's talk, I will make an overview of the current state of additive printing methods in light of the use of this technology for the rapid prototyping of functional devices. In particular, I will discuss the use of 3D printing for devices with a gradient index of refraction used to control the direction of an electromagnetic wave in a microwave region.
Mon 11 Feb 2019, 09:26 | Tags: Seminar

DST Seminar: Engineering at the Nanoscale – gaining insight through advanced characterisation

Prof Barbara Shollock
WMG, University of Warwick
Wednesday 5th December
Materials & Analytical Sciences 2.06

From the gas turbines that power the Airbus to the steels used for cars and food cans, engineering alloys form an important class of materials, but can appear less exciting than headline-grabbing nanomaterials and biomaterials.

Despite their unglamorous press, these alloys require understanding at the nanoscale to develop new alloys and to mitigate failure in service. This talk will review a range of alloys, the challenges they face in service and characterisation approaches to determine their nanoscale chemical, structural and physical behaviour.

Tue 04 Dec 2018, 11:11 | Tags: Seminar

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