Researchers have developed a technique for generating acoustic bottles in open air that can bend the paths of sound waves along prescribed convex trajectories. These self-bending bottle beams hold promise for ultrasonic imaging and therapy, and acoustic cloaking, levitation and particle manipulation.
Using a new method to track the electrochemical reactions in a common electric vehicle battery material under operating conditions, scientists have revealed new insight into why fast charging inhibits this material's performance.
A chance discovery about graphene - already exciting scientists because of its potential uses in electronics, energy storage and energy generation - takes it a step closer to being used in medicine and human health.
Scientists have made an astonishing observation: they were investigating the formation of gold nanoparticles in a solvent and observed that the nanoparticles had not distributed themselves uniformly, but instead were self-assembled into small clusters.
Researchers were able to tune the intrinsic stress of thin-filmsby optimizing the grain boundary materials and the thickness of the films. This opens the door for using diamond for fabricating advanced MEMS devices.
Molybdenum disulfide is a compound often used in dry lubricants. Its semiconducting ability and similarity to the carbon-based graphene makes molybdenum disulfide of interest to scientists as a possible candidate for use in the manufacture of electronics, particularly photoelectronics. New work reveals that molybdenum disulfide becomes metallic under intense pressure.
Metal-organic frameworks (MOFs) can take up gases similar to a sponge that soaks up liquids. Hence, these highly porous materials are suited for storing hydrogen or greenhouse gases. However, loading of many MOFs is inhibited by barriers. Scientists now report that the barriers are caused by corrosion of the MOF surface. This can be prevented by water-free synthesis and storing strategies.