Physics

Pore size influences nature of complex nanostructures

In new research that could help inform development of new materials, chemists have found that the empty space ('pores') present in two-dimensional molecular building blocks fundamentally changes the strength of these van der Waals forces, and can potentially alter the assembly of sophisticated nanostructures.

Einstein-de Haas effect has a central role in ultrafast demagnetization processes

The Einstein-de Haas effect, first demonstrated more than a century ago, provides an intriguing link between magnetization and rotation in ferromagnetic materials. Researchers have now found that the effect has also a central role in ultrafast processes that happen at the sub-picosecond timescale -- and thus deliver fresh insight into materials that might form the basis for novel devices.

Brilliant glow of paint-on semiconductors comes from ornate quantum physics

A new wave of semiconductors that can be painted on is on the horizon. It bears the promise of revolutionizing lighting all over again and of transforming solar energy. Ornate quantum particle action, revealed here, that drives the new material's properties defies the workings of established semiconductors.

CERN lays out vision for next-generation particle collider

Scientists behind the world's largest atom smasher have laid out their multibillion-euro vision to build an even bigger one, in hopes of unlocking even more secrets of matter and the universe in the coming decades.

New effect in the interaction of plasmas with solids discovered

If a plasma comes in contact with a solid, under certain circumstances the surface is changed fundamentally and permanently. Researchers have now discovered a surprising effect, in which the electronic properties of the solid material, such as its electrical conductivity, can be changed in a controlled, extremely fast and reversible manner, by ion impact.

Understanding physics could lead to big gains in shale oil recovery

Oil companies are missing out on vast sums of recoverable oil in unconventional reservoirs, according to Penn State experts.

Light up logic: Engineers perform computational logic with light

For the first time, researchers performed logic operations -- the basis of computation -- with a chemical device using electric fields and ultraviolet light. The device and the pioneering methods used open up research possibilities including low-power, high-performance computer chips.

Experiments detect entropy production in mesoscopic quantum systems

One of the most important aims of contemporary scientific research is finding out what makes the production of entropy predominate. This aim explains the current interest in studying mesoscopic systems, which are not as small as individual atoms but nevertheless display well-defined quantum behavior.

Einstein–de Haas effect offers new insight into a puzzling magnetic phenomenon

More than 100 years ago, Albert Einstein and Wander Johannes de Haas discovered that when they used a magnetic field to flip the magnetic state of an iron bar dangling from a thread, the bar began to rotate.

Discovery of single atom structure leads to more efficient catalyst

The discovery shows an efficiency rate that is up to 25 times higher than traditional catalysts made from larger iridium structures or nanoparticles.

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