Is this what the energy source of the future will look like? Specially synthesized molecules split water into its components, hydrogen and oxygen, with the help of sunlight. The plan is for this process, which occurs in nature as “photosynthesis”, to be replicated in the laboratory to free the world from its dependency on fossil fuels. This artificial photosynthesis should supply mankind with a virtually inexhaustible and clean energy carrier.
Unfortunately, the dream of artificial photosynthesis as an energy supplier on a grand scale is still a long way off becoming a reality. Scientists have yet to acquire the necessary knowledge concerning the fundamental processes inside potential hydrogen producers. However, a new research group at the University of Würzburg is about to start work on this, bringing together scientists from various branches of physics and chemistry. Its spokesman is Professor Tobias Brixner, Chairman of the Department of Physical Chemistry I. The German Research Foundation (DFG) will be providing around EUR 2.3 million in funding for the project over the next three years.
New materials with specific properties
Molecular aggregates and their reactions to light will be the main focus of the Würzburg research group. “We will examine the interaction between light and matter with a view to understanding and controlling the dynamic processes and optical phenomena,” says Brixner. It is hoped that their findings will enable the scientists to customize new materials with specific properties.
Of course, facilitating the breakthrough of artificial photosynthesis will be just one of the goals with these new materials. Extremely energy-efficient light sources, tap-proof encryption technology, super-fast quantum computers, effective photovoltaic elements, nano-components that can repair themselves: these will all be conceivable once the fundamental processes in the molecular aggregates have been clarified and understood.
Research on molecular aggregates
Molecular aggregates: chemists understand these as the smallest building blocks in macroscopic systems such as liquids, solutions, or crystals. Inside these, molecules are arranged in specific structures with strong or weak links binding them. The diverse interactions between the individual blocks determine what happens inside the aggregates when light falls on them.
“What makes molecular aggregates so special and therefore appealing compared, for example, to inorganic solids is the fact that the properties of these molecular ‘basic building blocks’ can be varied deliberately,” explains Brixner. Changes at the microscopic level result in changes on a macroscopic scale as well. Though, the exact processes are still unknown. “In the past, although scientists went to great lengths examining countless molecules optically, there was generally no systematic variation of aggregates,” says Brixner. In many cases, therefore, current knowledge is inadequate for a prediction of the properties of a complex system based on the properties of the underlying molecular building blocks.
Better understanding of internal processes
This is where the work of the Würzburg research group will begin: the group will spend the next three years closely studying the interactions between light and matter in molecular aggregates. “Once we are familiar with the fundamental rules of the interactions, it should be possible to produce a new generation of materials that exceed those we have today,” states Brixner.
The Würzburg research group possesses the knowledge and technology required for this research. Its members come from the fields of theoretical, physical, and organic chemistry as well as experimental physics; they have the necessary expertise in all the requisite research methods and in the respective equipment – ranging from spectroscopy to photoconductivity measurement. The bundling of available experimental and theoretical resources will enable “unique cooperative research in the area of light-matter interaction”.
The members of the research group are as follows:from Physical and Theoretical Chemistry:
Gunnar Bartsch | idw
Researchers printed graphene-like materials with inkjet
18.08.2017 | Aalto University
Superconductivity research reveals potential new state of matter
17.08.2017 | DOE/Los Alamos National Laboratory
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
18.08.2017 | Life Sciences
18.08.2017 | Physics and Astronomy
18.08.2017 | Materials Sciences