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Physics - Chemistry - 09.12.2021 
New State of Matter: Crystalline and Flowing at the Same Time
Through their research efforts, the team was able to finally disprove an intuitive assumption that in order for two particles of matter to merge and form larger units (i.e. aggregates or clusters), they must be attracted to each other. As early as the turn of the century, a team of soft matter physicists headed by Christos Likos of the University of Vienna predicted on the basis of theoretical considerations that this does not necessarily have to be the case.
Chemistry - Health - 14.10.2021 
Let there be Light: Photoinitiators for Dental Fillings, Contact Lenses and Dentures etc
Photoinitiators ensure that liquid plastic - for example for dental fillings - hardens quickly by means of light. Thanks to a new synthesis method developed by TU Graz, these initiators can be produced cheaply, something which will open up further doors for the technology. Anyone who has ever been in the dentist's chair with a hole in their tooth is probably familiar with the procedure.
Chemistry - Physics - 29.09.2021 
Molecular burdocks: peptides guide self-assembly on the micrometre scale
Chemists demonstrate new approach to self-assembly of colloidal nanoparticles Sometimes even small forces can make comparatively big things happen: In a study in "Angewandte Chemie", scientists from the Faculty of Chemistry at the University of Vienna showed how short peptides can trigger the self-assembly of comparatively large nanoparticles into new structures on the micrometre scale.
Chemistry - Mathematics - 28.07.2021 
From chemical Graphs To Structures
Three-dimensional (3D) configurations of atoms dictate all materials properties. Quantitative predictions of accurate equilibrium structures, 3D coordinates of all atoms, from a chemical graph, a representation of the structural formula, is a challenging and computationally expensive task which is at the beginning of practically every computational chemistry workflow.
Physics - Chemistry - 13.07.2021 
Electrons in quantum liquid gain energy from laser pulses
The absorption of energy from laser light by free electrons in a liquid has been demonstrated for the first time. Until now, this process was observed only in the gas phase. The findings, led by Graz University of Technology, open new doors for ultra-fast electron microscopy. The investigation and development of materials crucially depends on the ability to observe smallest objects at fastest time scales.
Life Sciences - Chemistry - 05.05.2021 
Tracking down the tiniest of forces: how T cells detect invaders
T cells use their antigen receptors like sticky fingers - a team from TU Wien and MedUni Vienna was able to observe them doing so. T-cells play a central role in our immune system: by means of their so-called T-cell receptors (TCR) they make out dangerous invaders or cancer cells in the body and then trigger an immune reaction.
Physics - Chemistry - 29.04.2021 
How acidic are atoms?
The acidity of molecules can be easily determined, but until now it was not possible to measure this important property for atoms on a surface. With a new microscopy technique from the Vienna University of Technology (TU Wien), this has now been achieved. The degree of acidity or alkalinity of a substance is crucial for its chemical behavior.
Physics - Chemistry - 23.02.2021 
Twin atoms: A source for entangled particles
Quantum experiments that could previously only be performed with photons are now also possible with atoms: Beams of entangled atoms have been produced at TU Wien (Vienna). Heads or tails? If we toss two coins into the air, the result of one coin toss has nothing to do with the result of the other. Coins are independent objects.
Chemistry - Physics - 22.01.2021 
Single atoms as a catalyst: Surprising effects ensue
For years, the metal nanoparticles used in catalysts have been getting smaller and smaller. Now, a research team at TU Wien in Vienna, Austria have shown that everything is suddenly different when you arrive at the smallest possible size: a single atom. Metals such as gold or platinum are often used as catalysts.
Chemistry - Physics - 11.01.2021 
Catalysts: Worth Taking a Closer Look
Why do metal oxide surfaces behave differently? At TU Wien, a new research method was found to answer important questions. Metal surfaces play a role as catalysts for many important applications - from fuel cells to the purification of car exhaust gases. However, their behaviour is decisively affected by oxygen atoms incorporated into the surface.
Physics - Chemistry - 21.12.2020 
The Mechanics of the Immune System
When T-cells of our immune system become active, tiny traction forces at the molecular level play an important role. They have now been studied at TU Wien. Highly complicated processes constantly take place in our body to keep pathogens in check: The T-cells of our immune system are busy searching for antigens - suspicious molecules that fit exactly into certain receptors of the T-cells like a key into a lock.
Physics - Chemistry - 24.11.2020 
Stable Catalysts for New Energy
Crucial new technologies such as hydrogen production or carbon capture require new catalysts. Experiments show: It's not just the material that matters, but also its atomic surface structure. On the way to a CO2-neutral economy, we need to perfect a whole range of technologies - including the electrochemical extraction of hydrogen from water, fuel cells, or carbon capture.
Materials Science - Chemistry - 12.11.2020 
TU Graz launches Christian Doppler Laboratory for Solid-State Batteries
The focus of the new CD laboratory is the reduction of interface resistances within the solid-state battery. The aim is to make this particularly safe energy storage system fit for electric vehicles and other high-energy applications. In recent years, intensive research has been carried out on solid-state electrolytes and materials have been developed which have a similarly high ionic conductivity to liquid electrolytes.
Chemistry - 10.11.2020 
Sweet taste reduces appetite?
The sweet taste of sugar, energy intake and the regulatory process of hunger and satiety To date, very little is known about how sweetness perception contributes to satiety. This study, conducted by an Austrian-German team led by chemists Veronika Somoza and Barbara Lieder, provides new insights into the relationship between the sweet taste of sugar, energy intake and the regulatory process of hunger and satiety.
Life Sciences - Chemistry - 04.11.2020 
Microbial space travel on a molecular scale
How extremophilic bacteria survive in space for one year Galactic cosmic and solar UV radiation, extreme vacuum, temperature fluctuations: how can microbes exposed to these challenges in space survive? An international team around Space Biochemistry group at the University of Vienna investigated how the space-surviving microbes could physically survive the transfer from one celestial body to another.
Materials Science - Chemistry - 01.10.2020 
Ecological power storage battery made of vanillin
Researchers at TU Graz have found a way to convert the aromatic substance vanillin into a redox-active electrolyte material for liquid batteries. The technology is an important step towards ecologically sustainable energy storage. TU Graz researcher Stefan Spirk has found a way to replace liquid electrolytes in redox flow batteries by vanillin.
Chemistry - Physics - 22.09.2020 
New Materials: A Toggle Switch for Catalysis
Electrochemical reactions, which will play an important role in the future of energy supply, can now be explained in detail, thanks to measurements carried out by TU Wien and DESY. 1/4 images The elektrochemistry team at TU Wien: Andreas Nenning, Harald Summerer, Alexander Opitz (left to right) (Copyright: TU Wien) 1/4 images The elektrochemistry team at TU Wien: Andreas Nenning, Harald Summerer, Alexander Opitz (left to right) (Copyright: TU Wien) 1/4 images A Perovskite thin film electrode, on a ZrO2 crystal - compared to a pen.
Physics - Chemistry - 27.08.2020 
Quantum Simulation of Quantum Crystals
International research team describes the new possibilities offered by the use of ultracold dipolar atoms The quantum properties underlying crystal formation can be replicated and investigated with the help of ultracold atoms. A team led by Dr. Axel U. J. Lode from the University of Freiburg's Institute of Physics has now described in the journal Physical Review Letters how the use of dipolar atoms enables even the realization and precise measurement of structures that have not yet been observed in any material.
Chemistry - Materials Science - 04.08.2020 
Machine learning methods provide new insights into organic-inorganic interfaces
Simulations at Graz University of Technology refute earlier theories on long-range charge transfer between organic and inorganic materials. Oliver Hofmann and his research group at the Institute of Solid State Physics at TU Graz are working on the optimization of modern electronics. A key role in their research is played by interface properties of hybrid materials consisting of organic and inorganic components, which are used, for example, in OLED displays or organic solar cells.
Physics - Chemistry - 30.07.2020 
TU Graz Researchers synthesize nanoparticles tailored for special applications
"Core-shell" clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient. Additional images for download can be found at the end of the message Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles - smallest portions of bulk material - form the basis for a whole range of new technological developments.
Chemistry
Results 1 - 20 of 150.
Through their research efforts, the team was able to finally disprove an intuitive assumption that in order for two particles of matter to merge and form larger units (i.e. aggregates or clusters), they must be attracted to each other. As early as the turn of the century, a team of soft matter physicists headed by Christos Likos of the University of Vienna predicted on the basis of theoretical considerations that this does not necessarily have to be the case.
Photoinitiators ensure that liquid plastic - for example for dental fillings - hardens quickly by means of light. Thanks to a new synthesis method developed by TU Graz, these initiators can be produced cheaply, something which will open up further doors for the technology. Anyone who has ever been in the dentist's chair with a hole in their tooth is probably familiar with the procedure.
Chemists demonstrate new approach to self-assembly of colloidal nanoparticles Sometimes even small forces can make comparatively big things happen: In a study in "Angewandte Chemie", scientists from the Faculty of Chemistry at the University of Vienna showed how short peptides can trigger the self-assembly of comparatively large nanoparticles into new structures on the micrometre scale.
Three-dimensional (3D) configurations of atoms dictate all materials properties. Quantitative predictions of accurate equilibrium structures, 3D coordinates of all atoms, from a chemical graph, a representation of the structural formula, is a challenging and computationally expensive task which is at the beginning of practically every computational chemistry workflow.
The absorption of energy from laser light by free electrons in a liquid has been demonstrated for the first time. Until now, this process was observed only in the gas phase. The findings, led by Graz University of Technology, open new doors for ultra-fast electron microscopy. The investigation and development of materials crucially depends on the ability to observe smallest objects at fastest time scales.
T cells use their antigen receptors like sticky fingers - a team from TU Wien and MedUni Vienna was able to observe them doing so. T-cells play a central role in our immune system: by means of their so-called T-cell receptors (TCR) they make out dangerous invaders or cancer cells in the body and then trigger an immune reaction.
The acidity of molecules can be easily determined, but until now it was not possible to measure this important property for atoms on a surface. With a new microscopy technique from the Vienna University of Technology (TU Wien), this has now been achieved. The degree of acidity or alkalinity of a substance is crucial for its chemical behavior.
Quantum experiments that could previously only be performed with photons are now also possible with atoms: Beams of entangled atoms have been produced at TU Wien (Vienna). Heads or tails? If we toss two coins into the air, the result of one coin toss has nothing to do with the result of the other. Coins are independent objects.
For years, the metal nanoparticles used in catalysts have been getting smaller and smaller. Now, a research team at TU Wien in Vienna, Austria have shown that everything is suddenly different when you arrive at the smallest possible size: a single atom. Metals such as gold or platinum are often used as catalysts.
Why do metal oxide surfaces behave differently? At TU Wien, a new research method was found to answer important questions. Metal surfaces play a role as catalysts for many important applications - from fuel cells to the purification of car exhaust gases. However, their behaviour is decisively affected by oxygen atoms incorporated into the surface.
When T-cells of our immune system become active, tiny traction forces at the molecular level play an important role. They have now been studied at TU Wien. Highly complicated processes constantly take place in our body to keep pathogens in check: The T-cells of our immune system are busy searching for antigens - suspicious molecules that fit exactly into certain receptors of the T-cells like a key into a lock.
Crucial new technologies such as hydrogen production or carbon capture require new catalysts. Experiments show: It's not just the material that matters, but also its atomic surface structure. On the way to a CO2-neutral economy, we need to perfect a whole range of technologies - including the electrochemical extraction of hydrogen from water, fuel cells, or carbon capture.
The focus of the new CD laboratory is the reduction of interface resistances within the solid-state battery. The aim is to make this particularly safe energy storage system fit for electric vehicles and other high-energy applications. In recent years, intensive research has been carried out on solid-state electrolytes and materials have been developed which have a similarly high ionic conductivity to liquid electrolytes.
The sweet taste of sugar, energy intake and the regulatory process of hunger and satiety To date, very little is known about how sweetness perception contributes to satiety. This study, conducted by an Austrian-German team led by chemists Veronika Somoza and Barbara Lieder, provides new insights into the relationship between the sweet taste of sugar, energy intake and the regulatory process of hunger and satiety.
How extremophilic bacteria survive in space for one year Galactic cosmic and solar UV radiation, extreme vacuum, temperature fluctuations: how can microbes exposed to these challenges in space survive? An international team around Space Biochemistry group at the University of Vienna investigated how the space-surviving microbes could physically survive the transfer from one celestial body to another.
Researchers at TU Graz have found a way to convert the aromatic substance vanillin into a redox-active electrolyte material for liquid batteries. The technology is an important step towards ecologically sustainable energy storage. TU Graz researcher Stefan Spirk has found a way to replace liquid electrolytes in redox flow batteries by vanillin.
Electrochemical reactions, which will play an important role in the future of energy supply, can now be explained in detail, thanks to measurements carried out by TU Wien and DESY. 1/4 images The elektrochemistry team at TU Wien: Andreas Nenning, Harald Summerer, Alexander Opitz (left to right) (Copyright: TU Wien) 1/4 images The elektrochemistry team at TU Wien: Andreas Nenning, Harald Summerer, Alexander Opitz (left to right) (Copyright: TU Wien) 1/4 images A Perovskite thin film electrode, on a ZrO2 crystal - compared to a pen.
International research team describes the new possibilities offered by the use of ultracold dipolar atoms The quantum properties underlying crystal formation can be replicated and investigated with the help of ultracold atoms. A team led by Dr. Axel U. J. Lode from the University of Freiburg's Institute of Physics has now described in the journal Physical Review Letters how the use of dipolar atoms enables even the realization and precise measurement of structures that have not yet been observed in any material.
Simulations at Graz University of Technology refute earlier theories on long-range charge transfer between organic and inorganic materials. Oliver Hofmann and his research group at the Institute of Solid State Physics at TU Graz are working on the optimization of modern electronics. A key role in their research is played by interface properties of hybrid materials consisting of organic and inorganic components, which are used, for example, in OLED displays or organic solar cells.
"Core-shell" clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient. Additional images for download can be found at the end of the message Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles - smallest portions of bulk material - form the basis for a whole range of new technological developments.
