Physics

Milikelvins drive droplet evaporation

Evaporation is so common that everybody thinks it's a well understood phenomenon. Appearances can be, however, deceptive. Recently, a new, earlier not predicted mechanism of evaporation was discovered. Experiments and simulations performed at the Institute of Physical Chemistry of the Polish Academy of Sciences and the Institute of Physics of the PAS not only confirm its existence, but also indicate that it plays the crucial role in evaporation process in the nanoscale.

Scientists break record for thinnest light-absorber: May lead to more efficient, cheaper solar cells

Scientists have built the thinnest, most efficient absorber of visible light on record, a nanosize structure that could lead to less-costly, more efficient, solar cells.

Evaporation: Tiny temperature differences are primary driving force in droplet evaporation

Evaporation is so common that everybody thinks it's a well understood phenomenon. Appearances can be, however, deceptive. Recently, a new, earlier not predicted mechanism of evaporation was discovered. Experiments and simulations not only confirm its existence, but also indicate that it plays the crucial role in evaporation process in the nanoscale.

Electronics: Graphene makes a magnetic switch

Tiny nanoribbons of carbon could be used to make a magnetic field sensor for novel electronic devices.

Giant electromagnet to conclude its 3,200-mile journey on July 26

For the past month, a 50-foot-wide circular electromagnet has been on a fantastic journey between two U.S. Department of Energy national labs: Brookhaven National Laboratory in New York and Fermi National Accelerator Laboratory in Illinois. On Friday, July 26, that voyage is expected to conclude. Fermilab is planning a party to celebrate the ring's safe arrival, and everyone's invited.

NASA Interplanetary Probes to Take Pictures of Earth from Space

Two NASA spacecraft, one studying the Saturn system, the other observing Mercury, are maneuvering into place to take pictures of Earth on July 19 and 20.

NASA's SOFIA Investigates the Southern Sky from New Zealand

NASA's SOFIA airborne observatory will be based in New Zealand for the next two weeks, taking advantage of the Southern Hemisphere's orientation to study celestial objects that are difficult or impossible to see in the northern sky.

NASA's Hubble Shows Link between Stars' Ages and Their Orbits

Astronomers using NASA's Hubble Space Telescope have determined the orbital motion of two distinct populations of stars in an ancient globular star cluster, offering proof they formed at different times and providing a rare look back into the Milky Way galaxy's early days.

News about ghost particles

(Phys.org) —Neutrinos are the most elusive particles having extremely weak interactions with all other particles. They have rather unusual properties and are even expected to be identical with their own antiparticles. So far this property is, however, not experimentally verified even though many studies of neutrinos over the last 60 years have already boosted our understanding of elementary particle physics.

The key to ion beams' polarisability

Polarisability determines the force with which an inhomogeneous external electric field acts on the ions of an ion beam. However, it can be quite tricky to obtain accurate values for this force. Now, two German theoretical chemists, Volker Koch from Bielefeld University and Dirk Andrae from the Free University Berlin, have devised formulas providing the polarisability of atomic ions as a function of their total charge number.

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