The results, which could be of importance for a variety of applications, have been published in the current issue of Science Magazine.
“A scanning tunneling microscope image of the surface of titanium dioxide with different forms of oxygen. The higher, white peaks are oxygen molecules that are sitting on the surface, the smaller double peak in the foreground is an oxygen molecule that is already embedded,“
Copyright: TU Vienna
Titanium dioxide is an inexpensive, yet versatile material. It is used as a pigment in wall paint, as a biocompatible coating in medical implants, as a catalyst in the chemical industry and as UV protection in sunscreen. When applied as a thin coating, it can keep all sorts of surfaces sparkling clean. The use of titanium oxide in the electronics industry is currently being investigated. Fundamental to all these properties could be the atomic properties discovered by Ulrike Diebold from the Institute of Applied Physics at TU Vienna and Annabella Selloni from the Frick Laboratory at Princeton and their teams.
Oxygen latches on
Diebold’s actual specialism is the physical and chemical properties of surfaces. “The surfaces of materials pose interesting fundamental questions, but are also important for applications”, explains the physicist. The surface of titanium dioxide, for example, interacts with oxygen from the air. How this happens at the atomic level has now been shown in Vienna. Martin Setvin from Diebold’s team took pictures of this surface with a scanning tunneling microscope. In this method, a fine metal tip is held extremely close to a surface, without actually touching it. A voltage is applied between the tip and the sample, which creates what is known as a tunneling current. This current is measured and displayed as an image.Atomic vacancies pulled upwards
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The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
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An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications
Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
The most basic of all physical interactions in nature is that between light and matter. This interaction takes place in attosecond times (i.e. billionths of a...
Transistors based on carbon nanostructures: what sounds like a futuristic dream could be reality in just a few years' time. An international research team working with Empa has now succeeded in producing nanotransistors from graphene ribbons that are only a few atoms wide, as reported in the current issue of the trade journal "Nature Communications."
Graphene ribbons that are only a few atoms wide, so-called graphene nanoribbons, have special electrical properties that make them promising candidates for the...
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08.12.2017 | Information Technology