Resonant-tunneling diodes are used in high-frequency oscillators, wave emitters and detectors, logic gates, photodetectors, and optoelectronic circuits. The study was a collaboration between Brazilian and German researchers.
In extreme heat or in the vacuum of space: a novel nanomaterial delivers top performance in extreme situations, as demonstrated by TU Wien (Vienna) with international partners.
Perovskites have so far been used for solar cells, as anode materials or electronic components rather than for their catalytic properties. Now scientists at TU Wien have succeeded in producing a special perovskite that is excellently suited as a catalyst for converting CO2 into other useful substances, such as synthetic fuels. The new perovskite catalyst is very stable and also relatively cheap, so it would be suitable for industrial use.
As artificial intelligence has attracted interest, researchers are focused on understanding how the brain accomplishes cognition so they can construct systems with general intelligence comparable to humans' intelligence. In Applied Physics Letters, researchers propose an approach to AI that focuses on integrating photonic components with superconducting electronics; using light for communication and complex electronic circuits for computation could enable artificial cognitive systems of scale and functionality beyond what can be achieved with either light or electronics alone.
New research confirms potential for exotic 'topological' materials to substantially reduce the energy consumed by computing. The theoretical study showed electronics based on topological insulators rather than conventional semiconductors can reduce transistor 'switching' energy by a factor of four, in the process defeating the famous 'Boltzman's tyranny', which puts a lower limit on operating voltage.
Stanford engineers find that cancer cells exhibit a unique mode of migration on squishy materials, which are similar to biological tissues. In contrast, cell movement - a process central to cancer metastasis and other biological processes - is typically studied on very rigid materials.
A team at HZB, together with partners from Ben Gurion University and the Technion, Israel, has now analysed the optoelectronic properties of rust (haematite) and other metal oxides in unprecedented detail. Their results show that the maximum achievable efficiency of haematite electrodes is significantly lower than previously assumed. The study demonstrates ways to assess new photoelectrode materials more realistically.
A new paper in the journal Science co-authored by Princeton University engineering professor Nathalie de Leon, IBM Quantum scientist Hanhee Paik and researchers from around the world argues that the ability to move forward on developing useful quantum computers requires new major advances in materials science, engineering and fabrication. The authors call for new approaches from broad areas of science and engineering.
Scientists have identified the primary cause of failure in a state-of-the-art lithium-metal battery, of interest for long-range electric vehicles: electrolyte depletion.
Using machine learning methods, researchers at TU Graz can predict the structure formation of functionalized molecules at the interfaces of hybrid materials. Now they have also succeeded in looking behind the driving forces of this structure formation.