Category Technology/Electronics

Magnetic order in (Sr,Na)Fe2As2: The crystal structure contains planes of iron atoms (shown as red spheres). Half the iron sites have a magnetization (shown as red arrows), which points either up or down, but the other half have zero magnetization. This shows that the magnetism results from the constructive and destructive interference of two magnetization waves, a clear sign that the magnetic electrons are itinerant, which means they are not confined to a single site. The same electrons are responsible for the superconductivity at lower temperature. Credit: Image courtesy of DOE/Argonne National Laboratory

Scientists have discovered only half the atoms in some iron-based superconductors are magnetic, providing the first conclusive demonstration of the wave-like properties of metallic magn...

All the movies, images, emails and other digital data from more than 600 basic smartphones (10,000 gigabytes) can be stored in the faint pink smear of DNA at the end of this test tube. Credit: Tara Brown Photography/ University of Washington

A new technique developed by Uni of Washington and Microsoft researchers could shrink the space needed to store digital data that today would fill a Walmart supercenter down to the size of a sugar cube. The team of computer scientists and electrical engineers has detailed one of the first complete systems to encode, store and retrieve digital data using DNA molecules, which can store information millions of times more compactly than current archival technologies.

In one experiment the team successfully encoded digital data from 4 image files into the n...

Electrical characteristics of graphene-azobenzene hybrid materials.(a) Scheme of the two-terminal device. (b) Reversible current modulation as a response to the device irradiation with different wavelengths (cycles of UV and visible light). (c) Scheme of the hybrid graphene–azobenzene structure when exposed to cycles of UV and visible light. Credit: Image courtesy of Graphene Flagship

Imagine a world where you can tailor the properties of graphene to have the outcome you desire. By combining its unique properties with the precision of molecular chemistry, scientists from Graphene Flagship have taken the first steps towards doing just that...

Three-dimensional network structure of the highly porous and flexible material DUT-49 (DUT= Dresden University of Technology) which displays the NGA-effect. Credit: Image courtesy of Technische Universitaet Dresden

Prof. Dr. Stefan Kaskel et al have found a new phenomenon in the field of gas-solid interactions: the so-called Negative Gas Adsorption (NGA). Adsorption refers to the process by which molecules of a gas collect on the surface of a solid. Metal-organic frameworks are highly porous materials which are widely used for adsorptive applications such as in the reduction of pollutant emissions.

The scientists from Dresden, Berlin and France have now succeeded in demonstrating that these materials can dynamically change their structures...