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78 Current news of TU Wienrss
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Creating a sponge-like hole structure on the nanometre scale that allows small molecules to pass through, record-breaking chemical reactivity was achieved
Catalysts are often solid materials whose surface comes into contact with gases or liquids, thereby enabling certain chemical reactions. However, this means that any atoms of the catalyst that are not on the surface serve no real purpose. Therefore, it is important to produce extremely porous ...
This could help, for example, to increase the storage capability per volume for hydrogen or to build chemical sensors with higher sensitivity
How do you integrate as much as possible of the 2D material graphene into a limited space? By producing it not on a flat surface, but on a 3D nanostructure. The carbon material graphene has no well-defined thickness, it merely consists of one single layer of atoms. It is therefore often referred ...
A novel, simple and extremely compact radiation source for terahertz waves: The possible applications are manifold.
Terahertz radiation has a wavelength of typically a little less than one millimetre - a technically difficult range. Electromagnetic waves with longer wavelengths can be generated with ordinary electronic components (such as transistors) and antennas. Smaller wavelengths can be obtained with ...
Since the 1960s, there has been speculation about a hypothetical propulsion method for interstellar space travel
In science fiction stories about contact with extraterrestrial civilisations, there is a problem: What kind of propulsion system could make it possible to bridge the enormous distances between the stars? It cannot be done with ordinary rockets like those used to travel to the moon or Mars. Many ...
Researchers are investigating new materials that can be used to reduce the operation temperature of solid oxide fuel cells: To do so, they apply an innovative method
Solid oxide fuel cells consist of three important parts: an anode, a cathode and an electrolyte. While oxygen is incorporated into the cathode, oxygen is then transported through the electrolyte to the anode, where oxygen reacts with hydrogen to water. The fuel cell is able to convert the energy ...
Circular economy for CO2
To establish a carbon-neutral circular economy in the future, technologies are needed that use carbon dioxide as a raw material. In the form of formate, CO2 can be metabolised by certain bacteria. Acetogens are a group of bacteria that can metabolise formate. For example, they form acetic acid – ...
A surprising discovery: A catalyst seems to contradict usual laws and can exhibit completely different activity states at the same time
Sometimes chemical reactions in the lab work the way you imagine them to, and sometimes they don't. Neither is unusual. What is highly unusual, however, is what a research team at TU Wien has now observed when studying hydrogen oxidation on a rhodium catalyst: The surface of a rhodium foil can be ...
Scientists succeed in linking microscopic and macroscopic approaches - and thus solve an old puzzle
Chemical reactions can be studied at different levels: At the level of individual atoms and molecules, new compounds can be designed. At the level of tiny particles on the nano and micrometre scale, one can understand how catalyst materials influence chemical reactions. And in order to use ...
Nickelates are a new promising material for future superconductivity technologies: Scientists have now succeeded in explaining their electronic structure.
Even after more than 30 years of research, high-temperature superconductivity is still one of the great unsolved mysteries of materials physics. The exact mechanism that causes certain materials to still conduct electric current without any resistance even at relatively high temperatures is still ...
From semiconductors to moon rocks: Many materials are treated with ion beams. A research group at TU Wien has now been able to explain how this process depends on the roughness of the surface. If you want to remove a layer of paint from a metal surface, you can use a sandblaster: Countless grains ...