Wednesday, April 22, 2015
Small electric voltage alters conductivity in key materials
Using only a 9-volt battery at room temperature, researchers have altered the thermal conductivity of the widely used material PZT (lead zirconate titanate) by as much as 11 percent at subsecond time scales.
Pseudoparticles travel through photoactive material
Researchers have unveiled an important step in the conversion of light into storable energy: They studied the formation of so-called polarons in zinc oxide. The pseudoparticles travel through the photoactive material until they are converted into electrical or chemical energy at an interface.
Low-reflection, nanostructured wings make butterflies nearly invisible
The effect is known from the smart phone: Sun is reflected by the display and hardly anything can be seen. In contrast to this, the glasswing butterfly hardly reflects any light in spite of its transparent wings. As a result, it is difficult for predatory birds to track the butterfly during the flight.
Invisible inks could help foil counterfeiters of all kinds
Consumers one day may snap photos with smartphones to see if an item is real.
Surface matters: Huge reduction of heat conduction observed in flat silicon channels
Combining state-of-the-art realistic atomistic modelling and experiments, a new paper describes how thermal conductivity of ultrathin silicon membranes is controlled to large extent by the structure and the chemical composition of their surface.
Nanoscientists model atomic structures of three bacterial nanomachines
Cryo electron microscope enables scientists to explore the frontiers of targeted antibiotics.
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