Researchers have observed a new state of matter in graphene layers twisted relative to each other. The coupling between negatively charged electrons and positively charged holes in the two layers results in a state that no longer conducts electric current.
The chemically controlled chains reveal an ultrastrong attraction between electrons that may help cuprate superconductors carry electrical current with no loss at relatively high temperatures.
Lead-free halide perovskite nanocrystals with unique optical properties are promising in light-emitting diodes (LEDs), photodetectors, and solar cells.
The novel superhydrophobic coating, which can potentially be used to create more efficient fuel cells and sensitive toxic gas detectors, can keep materials dry for longer and at greater depths.
Researchers succeed in the direct bonding of diamond and gallium nitride (GaN) at room temperature and demonstrate that the bond can withstand heat treatments of 1000 C, making it ideal for the high temperature fabrication process of GaN-based devices.
