Stefan Bon receives Warwick Award for Teaching Excellence (WATE)

The Warwick Awards for Teaching Excellence (WATE) are handed out annually by the University of Warwick (UK) and aim to recognise those who have made a difference to the student learning experience through their work and their teaching practice. This year there were over 400 nominations by staff and students.

After an extraordinary academic year (2020-2021), WATE will be celebrating stories of ’everyday excellence’ in challenging times. Award winners are recognised for their exceptional commitment, impact and innovation to higher eduction by supporting students and colleagues, planting the seeds for future approaches to teaching and learning as we emerge from the global COVID pandemic.

One of the recipients this year of an individual Warwick Award for Teaching Excellence (WATE) is prof. dr. ir. Stefan Bon, a chemical engineer with expertise in polymer and colloid science, who works in the Department of Chemistry within the Faculty of Science, Engineering, and Medicine.

Prof. Bon is passionate about and dedicated to education, has an excellent relationship with the students, and has a track record to innovate in and to deliver great learning environments and experiences for students at Warwick. Throughout the years he has delivered original and exciting modules in polymer and colloid science, thermodynamics, kinetics, mathematics, key skills, and chemistry practical lab classes.

His creativity, drive, and passion to teach science and his engagement with the student community have led to progressive educational ideas being implemented at Warwick University, amongst which Chemistry Café, a highly successful student led social informal learning space, a concept now rolled out to multiple departments.

Prof. dr. ir. Stefan Bon says: “ This award came as a total surprise. I am absolutely delighted to have been nominated by our students and I am thrilled that the WATE committee decided to make me one of this year’s WATE recipients. I truly feel touched by this, it means a lot.

I would like to say a massive ‘thank you’ to all the students for their enthusiasm and dedication to their studies, standing up for themselves and each other, and forming together the Warwick community, especially in these unusual and difficult COVID times. I am proud of what they have achieved, especially in this academic year.

Teaching science is a key reason why I became an academic. The opportunity to mesmerise people with scientific concepts and see them use and apply these with enthusiasm to discover new science and develop innovative strategies for a more sustainable society, makes me very happy.

The combined learnings from teaching over one academic year remotely/blended, together with the STEM-grand challenge plans Warwick University has for the sciences, is a not to be missed opportunity to provide a step-change in higher education delivery.”

Prof. Bon is contributing actively to this with colleagues from across the University and is leading a task group under the Education and Students Experience Work Group, to look at new and exciting learning opportunities and curriculum design and how these can be implemented for Warwick science.

Autonomous electricity-free "icy road" warning signs

Autonomous electricity-free "icy road" warning signs

We set out to develop a prototype for “icy road” warning signs which was able to operate autonomously without the use of electricity, and which could be easily placed onto existing road features, such as street boundary pillars and road safety barriers.

The number of road accidents in the UK under frosty or icy conditions runs in the thousands. Our concept would aid to reduce these numbers, without the introduction of a digital, and thus electric, infrastructure.

The results from our studies are now published open access in the Journal of Materials Chemistry C from the Royal Society of Chemistry. The conceptual road sign application is a multi-lamellar flexible strip.

A temperature triggered response in the form of an upper critical solution temperature (UCST) type phase separation targeted near the freezing point of water manifests itself through light scattering as a clear-to-opaque transition. It is simultaneously amplified by an enhanced photoluminescence effect.

Replacing titanium dioxide as opacifier: consider a shape change

Replacing titanium dioxide as opacifier: consider a shape change

A fresh lick of paint breathes new life into a tired looking place. Ever wondered how a thin layer of paint is so effective in hiding what lies underneath from vision? Beside colour pigments, and a binder that makes it stick, paints contain microscopic particles that are great at scattering light and turning that thin layer of paint opaque. The golden standard for these opacifiers are small titanium dioxide particles, of dimensions considerably smaller than one micron. Their use is not without controversy, as they are a big environmental burden, with a large carbon footprint and a questionable impact on human health. The reason why titanium dioxide particles are great at scattering light is that they have a high refractive index compared to the other paint ingredients, so when distributed throughout the dried paint film their hiding power of the underlying surface is fantastic. When no coloured pigments are used, the coated surface appears then whiter than white.

Ideally though, titanium dioxide should be replaced, but the list of safe high refractive materials is very limited. This makes you wonder if there is another handle, beside refractive index? Can we design efficient scattering enhancers from materials of lower refractive index?. Inspiration came from the white Cyphochilus beetle, native to southeast Asia. The scales of the beetle are not made of high refractive index materials, but they thank their white appearance to an intricate anisotropic porous microstructure, resembling the bare branches of a dense bush.