Photoexcited Graphene Puzzle Solved
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- Written by Johannes Gutenberg-Universität Mainz
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Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for light detectors can offer significant improvements with respect to materials being used nowadays. For example, graphene can detect light of almost any color, and it gives an extremely fast electronic response within one millionth of a millionth of a second. Thus, in order to properly design graphene-based light detectors it is crucial to understand the processes that take place inside the graphene after it absorbs light.
New High-Voltage Silicon Carbide Inverter Enables Stabilization of Medium-Voltage Grids
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- Written by Fraunhofer-Institut für Solare Energiesysteme ISE
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Researchers at the Fraunhofer Institute for Solar Energy Systems ISE developed and successfully put into operation an inverter for direct feed-in to the 10 kV medium-voltage grid. The inverter contains high-voltage silicon carbide (SiC) transistors which allow for coupling to the medium voltage grid without requiring an additional transformer. The three-phase inverter can be used to regulate reactive power as well as to actively filter undesirable harmonics in the electricity grid. Thus, it actively contributes to the stabilization of future power grids with a large share of renewables.
Organic Light-emitting Diodes Become Brighter and More Durable
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- Written by Technische Universität Dresden
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Organic light-emitting diodes (OLEDs) truly have matured enough to allow for first commercial products in the form of small and large displays. In order to compete in further markets and even open new possibilities (automotive lighting, head-mounted-displays, micro displays, etc.), OLEDs need to see further improvements in device lifetime while operating at their best possible efficiency. Currently, intrinsic performance progress is solely driven by material development.
If Solubilty is the Problem - Mechanochemistry is the Solution
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- Written by Technische Universität Dresden
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Chemist Dr. Lars Borchardt and his team at TU Dresden recently achieved a huge breakthrough in the synthesis of nanographenes. Because of their unique electrical, thermal and mechanical characteristics, the carbon modification graphene and its little brothers the nanographenes are known as a very promising material for applications in electronics, sensor technology and energy storage.
Molecular Switch Will Facilitate the Development of Pioneering Electro-optical Devices
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- Written by Technische Universität München
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A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
Designer Cells: Artificial Enzyme can Activate a Gene Switch
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- Written by Universität Basel
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Complex reaction cascades can be triggered in artificial molecular systems: Swiss scientists have constructed an enzyme than can penetrate a mammalian cell and accelerate the release of a hormone. This then activates a gene switch that triggers the creation of a fluorescent protein. The findings were reported by researchers from the NCCR Molecular Systems Engineering, led by the University of Basel and ETH Zurich.
Self-illuminating Pixels for a New Display Generation
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- Written by Fraunhofer-Institut für Angewandte Polymerforschung IAP
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There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
Cellular Valve Structure Opens Up Potential Novel Therapies
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- Written by Universität Zürich
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Biochemists at the University of Zurich have determined the detailed structure of a volume-regulated chloride channel. This cellular valve is activated in response to swelling to prevent the cell from bursting. The protein also plays an important role in the uptake of chemotherapeutics and the release of neurotransmitters after a stroke. The controlled regulation of its activity thus opens up a promising strategy for novel therapies.
Printed in-situ Perovskite Solar Cells Save Resources and Can Be Produced Locally
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- Written by Fraunhofer-Institut für Solare Energiesysteme ISE
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Photovoltaics (PV) is one of the key technologies of a sustainable energy supply based on renewable energy. Besides silicon-based photovoltaics, which presently dominates the market, there are other materials, such as perovskite, that also show great potential. Scientists are testing the proof of concept of these new types of solar cells.
“Electricity as a Raw Material” at ACHEMA 2018: Green Energy for Sustainable Chemistry
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- Written by Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT
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Hydrogen peroxide, ethene, alcohols: The Fraunhofer lighthouse project “Electricity as a raw material” is developing electrochemical processes that use renewable electricity to synthesize basic chemicals - with the aim of making the chemical industry more sustainable. From June 11 to 15, Fraunhofer UM-SICHT will be presenting the results together with eight other Fraunhofer Institutes at ACHEMA 2018.
Explanation for Puzzling Quantum Oscillations has been Found
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- Written by Institute of Science and Technology Austria
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So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics. Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a quantum simulator.
3D Images of Cancer Cells in the Body: Medical Physicists from Halle Present new Method
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- Written by Martin-Luther-Universität Halle-Wittenberg
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Making tumour cells glow: Medical physicists at Martin Luther University Halle-Wittenberg (MLU) have developed a new method that can generate detailed three-dimensional images of the body's interior. This can be used to more closely investigate the development of cancer cells in the body. The research group presents its findings in "Communication Physics", a journal published by the Nature Publishing Group.
Antibiotic Resistance – Quick and Reliable Detection
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- Written by Deutsches Zentrum für Infektionsforschung
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Early detection of antibiotic resistant pathogens can be life-saving. DZIF-scientists at the Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, have developed an antibody-based diagnostic test, which can identify carbapenem-resistant Acinetobacter baumannii bacteria in only 10 minutes – in a process similar to a pregnancy test.
The Slipperiness of Ice Explained
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- Written by Max-Planck-Institut für Polymerforschung
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Everybody knows that sliding on ice or snow, is much easier than sliding on most other surfaces. But why is the ice surface slippery? This question has engaged scientists for more than a century and continues to be subject of debate. Researchers from AMOLF, the University of Amsterdam and the Max Planck Institute for Polymer Research (MPI-P) in Mainz, have now shown that the slipperiness of ice is a consequence of the ease with which the topmost water molecules can roll over the ice surface.
Light-induced Superconductivity Under High Pressure
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- Written by Max-Planck-Institut für Struktur und Dynamik der Materie
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A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.
3D Structure of DNA Forms Defined Room for Dissociated lncRNAs to Activate Gene Expression
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- Written by Max-Planck-Institut für molekulare Genetik
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Enhancers are regulatory regions of the DNA, giving rise to “long non-coding RNAs” (lncRNAs), which are known as crucial regulators of gene expression. Scientists from the Max Planck Institute for Molecular Genetics in Berlin now have shown that a lncRNA called A-ROD is only functional the moment it is released from chromatin into the nucleoplasm. In the current issue of Nature Communications the researchers demonstrate that the regulatory interaction requires dissociation of A-ROD from chromatin, with target specificity ensured within the pre-established chromosomal proximity. This can heavily influence our understanding of dynamic regulation of gene expression in biological processes.
