A new material, called 'rewritable magnetic charge ice', has an unprecedented degree of control over local magnetic fields. The artificial, magnetically charged structure is formed by manipulating local magnetic charges that set the state of the magnetic 'bits'.
Researchers have advanced gallium nitride (GaN)-on-silicon transistor technology by optimizing the composition of the semiconductor layers that make up the device. The team created the high electron mobility transistor (HEMT) structure on a 200 mm silicon substrate with a process that will scale to larger industry-standard wafer sizes.
Scientists have determined that the active sites for two reactions involving carbon dioxide (carbon monoxide oxidation and water-gas shift) are associated with small platinum particles and not single platinum atoms as previously proposed.
Researchers have designed one of the strongest lightweight materials known, by compressing and fusing flakes of graphene, a two-dimensional form of carbon. The new material, a sponge-like configuration with a density of just 5 percent, can have a strength 10 times that of steel.
In a microscopic feat that resembled a high-wire circus act, researchers have coaxed DNA nanotubes to assemble themselves into bridge-like structures arched between two molecular landmarks on the surface of a lab dish.