Named for the mythical god with two faces, Janus membranes - double-sided membranes that serve as gatekeepers between two substances - have emerged as a material with potential industrial uses. Creating two distinct 'faces' on these delicate surfaces, however, is a process fraught with challenges.
The properties of a solid depend on the arrangement of its atoms, which form a periodic crystal structure. At the nanoscale, arrangements that break this periodic structure can drastically alter the behavior of the material, but this is difficult to measure. Recent advances by scientists are starting to unravel this mystery.
A nanodevice that generates an electrical current from a spin current, which in turn is generated by mechanical oscillations, demonstrates the versatility of electron spin to convert between energy forms.
Two high-speed electron microscopes. 7,062 brain slices. 21 million images. For a team of scientists these numbers add up to a technical first: a high-resolution digital snapshot of the adult fruit fly brain.
Researchers modified titanium dioxide nanoparticles so that they could be activated with blue light. In a proof-of-concept experiment. After four hours of treatment, the whitening level was similar to that obtained with hydrogen-peroxide-based agents.