The aim is to identify, understand, and control the nature of various physical phenomena and functionalities of condensed matter systems. We approach this problem using a variety of linear and non-linear optical techniques and by developing microscopic models to describe the observed phenomena.
The research group Optical Condensed Matter Physics is part of the Zernike Institute for Advanced Materials, a research institute within the Faculty of Science and Engineering of the University of Groningen.
May 8, 2020
On May 8, 2020, Björn Kriete succesfully defended his PhD thesis, entitled "Exciton Dynamics in Self-Assembled Molecular Nanotubes".
The degree was awarded with the distinction : Cum Laude.
We employed a lab-on-a-chip approach as a means to obtain in situ control of the structural complexity of an artificial light-harvesting complex: molecular double-walled nanotubes.
Rapid and stable dissolution of the outer wall was realized via microfluidic mixing thereby rendering the thermodynamically unstable inner tubes accessible to spectroscopy. By measurement of the linear dichroism and time-resolved photoluminescence of both double-walled nanotubes and isolated inner tubes we show that the optical (excitonic) properties of the inner tube are remarkably robust to such drastic perturbation of the system’s supramolecular structure as removal of the outer wall.
This work was published in the journal Physical Chemistry Chemical Physics
It can be downloaded here.
Semiconductors convert energy from photons (light) into an electron current. However, some photons carry too much energy for the material to absorb. These photons produce "hot electrons," and the excess energy of these electrons is converted into heat. Materials scientists have been looking for ways to harvest this excess energy. Scientists from the University of Groningen and Nanyang Technological University (Singapore) have now shown that this may be easier than expected by combining a perovskite with an acceptor material for hot electrons. Their proof of principle was published in Science Advances on 15 November.
Press release from University Groningen, the Netherlands
Press release from Nanyang Technology University, Singapore