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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

Fundraising campaign launched to help feed hungry students
2012-03-28

 

From the left is Dr. Carin Buys (Patron of NSH), Ms. Nicky Abdinor (guest speaker), Mrs. Grace Jansen (patron of NSH) and Redi Tlhabi (master of ceremonies).
Photo: Johan Roux
28 March 2012

Video clip (YouTube)

The University of the Free State (UFS) received over R200 000 for its No Student Hungry (NSH) Programme at the NSH launch dinner on Friday 23 March 2012 in Bloemfontein.

Prof. Jonathan Jansen, Vice-Chancellor and Rector of the UFS as well as founder of the NSH Programme donated R100 000 from the proceeds of his book We Need to Talk to this programme. Standard Bank also donated R30 000.

An additional amount of about R90 000 was raised by means of pledges made by guests and the auctioning of several items. These items were donated by local companies and university staff.

The No Student Hungry Programme (NSH) aims to raise funds to provide modest food bursaries for needy students and give them daily access to a balanced meal.
Prof. Jansen started the NSH programme in 2011 with the proceeds of his book, We Need to Talk.

The NSH funds more than 100 students in the hope of helping them to excel in their academic endeavours and, ultimately, to obtain their degrees.

In 2011, Prof. Jansen discovered that a significant number of students were studying without eating on a regular basis. These were often students with strong academic records but without adequate funding to sustain themselves with regular meals.

The project was established in January 2011 when the NSH Team started to develop the structure and processes of the programme. The first 100 students who were awarded the food bursaries started using their student cards for daily meals on campus on 1 April 2011.

“The No Student Hungry Campaign is not only about creating a university campus that cares. It is about creating a country where being human matters. Our students on the NSH project are amazing young people. They struggle to get by, but they have great potential and achieve good marks," Prof. Jansen said on Friday.

Prof. Jansen’s wife, Grace, and Dr Carin Buys, wife of Mr Rudi Buys, Dean of Student Affairs, volunteered to drive the programme and raise funds to address the problem. They are supported by various divisions within the university.

Students apply for the bursaries and are selected on the basis of their financial needs, good academic results, active participation in student life programmes and commitment to give something back to the community.

The raising of funds is a continuous process involving awareness campaigns, seeking of partnerships with companies and institutions and support from the general public, staff and individuals.

An agreement has been made with several food outlets/restaurants on campus who offer healthy, balanced meals to NSH students when they swipe their student cards that are funded by the programme.

At the end of the year the process is reviewed and students who still qualify are reinstated on the programme, whilst those whose circumstances have changed or are no longer in need of the bursaries, make way for new applications.

The NSH Team meets with students on a regular basis with the purpose of offering training, motivation and opportunities for personal growth and career development. Students are also expected to become involved in projects as a way of ploughing back into the community.

The goal is to expand the project annually as support for it grows.
Ms Nicky Abdinor, a clinical psychologist from Cape Town, who was born without arms and with shortened legs, provided an entertaining motivational speech at the launch. Ms Abdinor, founder of the Nicky's Drive organisation, also visited the UFS’ Unit for Students with disabilities where she delivered a talk on independence for people living with disabilities.

To become involved with the NSH Programme, please contact Mrs René Pelser on +27(0)51 4019087 or e-mail pelserr@ufs.ac.za.


Media Release
28 March 2012
Issued by: Lacea Loader
Director: Strategic Communication
Tel: +27(0)51 401 2584
Cell: +27(0)83 645 2454
E-mail: news@ufs.ac.za

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