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
From ancient fossils to future cars
21.10.2016 | University of California - Riverside
Study explains strength gap between graphene, carbon fiber
20.10.2016 | Rice University
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences