Scientists have demonstrated that they can detect extremely small changes in position and forces on very small drums of graphene. Graphene drums have great potential to be used as sensors in devices such as mobile phones.
Bringing two electrical insulators together to create an electrical superconductor: Anyone wishing to analyze such phenomena in nanostructures will soon come up against metrological limitations - unless a new method is used that physicists have developed.
Researchers have found one new gold molecule, a catalyst containing exactly 25 gold atoms, that is powerful as well as sophisticated. It catalyzes the conversion of a variety of molecules, including the transformation of poisonous carbon monoxide into harmless carbon dioxide, a reaction that may find application in devices near gas flues or wood-burning stoves.
Engineers have developed a low-cost, emissions-free device that uses an ordinary AAA battery to produce hydrogen by water electrolysis. The battery sends an electric current through two electrodes that split liquid water into hydrogen and oxygen gas. Unlike other water splitters that use precious-metal catalysts, the electrodes are made of inexpensive and abundant nickel and iron.
Such a device could be used for ultra-high-speed and high-resolution imaging in chemistry, biology, materials science and condensed matter physics. For example, in the life sciences, one could view images with resolutions clear enough to see individual carbon atoms, or to discern events such as a chemical reactions that last one quadrillionth of a second or shorter.
Researchers have recorded the first direct observations of how facets form and develop on platinum nanocubes in solution, pointing the way towards more sophisticated and effective nanocrystal design and revealing that a nearly 150 year-old scientific law describing crystal growth breaks down at the nanoscale.