Estrogen is a tiny molecule, but it can have big effects on humans and other animals. Estrogen is one of the main hormones that regulates the female reproductive system – it can be monitored to track human fertility and is sometimes administered to livestock like cows and sheep to control the reproductive cycle. Researchers from… Read more

Cells taken from the airways of Parisian children with asthma contained man-made carbon nanotubes, just like the kind found in the exhaust pipes of vehicles in Paris. The researchers report that these samples align with what has been found elsewhere in US cities, in spider webs in India, and in ice cores. The research in… Read more

Using nanometer-scale components, researchers have demonstrated the first optical rectenna, a device that combines the functions of an antenna and a rectifier diode to convert light directly into DC current Based on multiwall carbon nanotubes and tiny rectifiers fabricated onto them, the optical rectennas could provide a new technology for photodetectors that would operate without… Read more

Three-dimensional structures of boron nitride might be the right stuff to keep small electronics cool. Rice University researchers Rouzbeh Shahsavari and Navid Sakhavand have completed the first theoretical analysis of how 3D boron nitride might be used as a tunable material to control heat flow in such devices. In its two-dimensional form, hexagonal boron nitride… Read more