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27 July 2021 | Story Leonie Bolleurs | Photo UFS Photo Archive
Prof Hendrik Swart played a key role in the Department of Physics acquiring the PHI Quantes XPS system, the first in Africa and one of only 20 in the world.

The state-of-the-art equipment in the Department of Physics at the University of the Free State (UFS) differentiates this department from its competitors. Availability of the equipment makes it possible for researchers as well as students to deliver work that receives national and international recognition. 

Recently, the department acquired a PHI Quantes XPS system, the first in Africa and one of only 20 in the world. 

Creating better phosphor 

“The Quantes XPS system uses X-rays to determine the chemical composition of molecules on the surface of a sample. The system is unique in the sense that it also has an extra X-ray source that can determine the chemical state below the surface, which was not possible in the past.  This will help us to dictate the position of defects in our phosphor materials that will consequently enable us to create better phosphor for solid state lighting as well as solar cell applications,” explains Prof Hendrik Swart, Senior Professor in the Department of Physics, who also holds the SARChI Chair in Solid State Luminescent and Advanced Materials.

After he had the opportunity to observe the system in the factory in Chigasaki, Kanagawa, Japan, where he attended a conference, Prof Swart was very impressed by its performance. He discussed it with Prof Koos Terblans, Head of the department, and other colleagues, and started making plans to buy the system. 

When the department first bought the X-ray photoelectron spectroscopy (XPS) system in 2007/2008, it became the national facility on XPS measurements. Not only is this an upgrade of the XPS system bought 14 years ago, but the new system will enable the department to do more measurements. “The number of samples that we have to handle has just become too much for one system. The new system’s increased capacity for making measurements addresses this challenge and it also gives UFS scientists and postgraduate students more time to spend on fundamental measurements to develop research of a higher level,” says Prof Swart.

(The Quantes XPS system. Photo:Supplied)

Explaining about the measurements, Prof Swart says: “This advanced X-ray photoelectron spectroscopy (XPS) instrument has the capability to analyse the very small area that the user is interested in and a large area of the uniform sample surface. The two different types of X-ray sources – the hard X-ray source and the more conventional soft X-ray source – can be switched automatically, allowing users to analyse the same area and/or points of a sample. The PHI Quantes XPS system ensures the availability of superior features such as automatic analysis, automatic sample transfer, turnkey charge neutralisation, and advanced data processing.”

“This XPS instrument is designed to pioneer new methods and applications transcending conventional ideas of what is possible.”

Optimising efficiency of materials

Prof Swart says the Department of Physics, especially the Research Chair in Advanced and Luminescent Materials, is developing new high-technology materials on a daily basis. “It is very important to know the chemical composition and defect distribution of the materials in order to add value to the fabrication of these materials,” he adds.

“The distribution of these defects is vital for the efficiency of the phosphor materials. If we know where these defects are located, we can determine the mechanisms of the light output coming from these phosphors,” describes Prof Swart.

Research conducted as part of the Research Chair in Solid State Luminescent and Advanced Materials will benefit significantly from this new system.

(Prof Koos Terblans, Head of the Department of Physics next to the Quantes XPS system. Photo:Supplied) 

“We are currently concentrating on phosphors as sensors (temperature), light-emitting diodes (LEDs), and solar cells, where we optimise the efficiency and durability of these materials. Any new knowledge, which I believe the PHI Quantes XPS system will provide us, will help us to reach our goal much quicker,” he says. 

Apart from the positive impact on research, the PHI Quantes XPS system will also be a benefit to society in the long term. Improved LEDs can be used to save electricity, and better solar cells can help to generate electricity, to mention but two examples. 

News Archive

Prof Frederick Fourie to step down as UFS rector
2008-09-08

“It is with sadness that I hereby announce my intention to step down as rector and vice-chancellor of the University of the Free State (UFS) in the 4th quarter of this year.

Obviously this decision has not been taken lightly. After careful consideration I am, however, convinced that this is as far as I can take the UFS as vice-chancellor and rector. This flows primarily from the exhausting times that I have experienced during the past nine years, first as vice-rector (since 1999) and then as rector (since 2003), in managing and implementing several complex strategic projects.

The challenges and complexities of continuous change management at a higher education institution, and specifically the demands of further dynamic development and transformation at the UFS, demand enormous amounts of emotional energy and drive. For me the stress due to, especially, the political divisions and tensions in the UFS Council and the broader university community during the past year has been extremely draining. The broader institution and its people also show signs of trauma.

I think it is time for new and fresh leadership, especially in the light of the transformation challenges of the UFS.

I have thus decided to step down in the interest of transformation and the further dynamic development of the UFS.

Having been on sabbatical leave since May, I will not return to take up my post. I will remain on leave until my official date of retirement from office. (The exact date must still be determined.)

I am grateful for the opportunity to have been at the helm of the UFS and to help the institution cross several bridges. During the past nine years I have been privileged to lead large strategic projects together with many dedicated and talented UFS colleagues. It has been a wonderful experience of thinking and working together in order to elevate the functioning of the University to new levels in several key areas.

One of the most important projects was the financial turnaround strategy of 2000-2005, which took the UFS from a financial crisis to a situation where currently it annually has almost R100 million of discretionary funding available to spend on strategic projects, and where staff remuneration and promotion opportunities have increased dramatically since 2000. In this period the UFS has also grown from approximately 10 000 students to more than 27 000 in 2008.

A second was the strategy to invest strongly in the academic core and notably research, research capacity and research apparatus. Since 2003 research outputs have increased by approximately 50% - a significant accomplishment of our researchers and faculties. In conjunction with this, the launch of the six strategic academic clusters (focus areas) should create the basis for the continued growth in the national and international stature of the UFS in future. The development of the national leadership role of the UFS with regard to community service also was a special and successful project.

A third large strategic project was the progress with regard to diversity, the balanced multilingualism policy in the academe as well as the administration, the employment equity plan, the UFS transformation plan and especially the institutional charter – which could lay the foundation for a university where one and all can experience a true sense of belonging amidst diversity. These have been important steps that we can feel proud of (although much work obviously remains with regard to non-racialism and also non-sexism).

As far as residences are concerned, it was historically significant that this time, in contrast to 1997/8, the UFS succeeded in crossing the bridge of diversity and integration in residences – with due regard to the difficulties we faced. Hopefully this will considerably ease the task of my successor and her/his management team in managing diversity and in pursuing best practice transformation.

A fourth large project was the large-scale upgrading and development of infrastructure, academic buildings and facilities as well as support service facilities, student facilities and pedestrian walkways. The objective was a campus of the highest quality and aesthetics to effect a lasting improvement in their work- and living environment for staff and students. Indeed, the UFS Main Campus today is seen as an example of sensitive and high quality campus planning.

Other initiatives which haven’t borne fruit yet are, for example, those with regard to entrepreneurial activities, sport development and sport business development, and the possible establishment of an engineering programme or faculty at the UFS.

On the whole the most important thing for me has been the progress in establishing a deep commitment to quality and equity/fairness and in boosting the national and international profile of the UFS as a high quality progressive university. Of course, justice, equity and quality intrinsically are challenges which require daily dedication to make it an ingrained habit.

I wish to thank all those people with whom I could work during the past years in tackling large and complex challenges with mutual loyalty, shared wisdom and effort – from the Financial Turnaround Team to the Exco, the Executive Management, the Faculties, the Senate, support service divisions, the University Council and several committees and task teams”.

Frederick C.v.N. Fourie
Rector and Vice-Chancellor
University of the Free State

Prof Frederick Fourie has been with the UFS since 1976. After obtaining a PhD in Economics from Harvard he was appointed professor at the age of 29 in 1982, head of the Department of Economics in 1992, Distinguished Professor in 1998, Dean of the Faculty of Economic and Management Sciences in 1997, Vice-rector: Academic in 1999 and vice-chancellor in 2003.

Media Release
Issued by: Lacea Loader
Assistant Director: Media Liaison
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@ufs.ac.za  
8 September 2008
 

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