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Results 41 - 60 of 385.


Chemistry - Physics - 17.11.2016
Researchers Uncover a New Way Heat Travels Between Molecules
A new model, developed by University of Pennsylvania chemists, could be the first step towards better harnessing heat energy to power nanoscale devices. Scientists have long understood that heat travels through vibrations. Molecules vibrate faster and faster as they heat up, and their vibrations cause other molecules around them to vibrate as well, warming cooler nearby molecules.

Materials Science - Physics - 17.11.2016
Switching off vibrations
Switching off vibrations
Macroscopic crystal structures can absorb unwanted vibrations or filter noise - without any electronics or electricity whatsoever.

Physics - Administration - 16.11.2016
Researchers present quantum technologies at major showcase
Researchers present quantum technologies at major showcase
Members of Bristol's Centre for Quantum Photonics presented their latest demonstrations to industry leaders, funding bodies and government representatives at this year's Quantum Showcase in London. The researchers occupied three stands in the exhibition space at the QEII Centre in Westminster, at an event attended by industry, government and funding bodies.

Physics - 16.11.2016
New records set up with
New records set up with "Screws of Light"
The research team around Anton Zeilinger has succeeded in breaking two novel records while experimenting with so-called twisted particles of light. In one experiment, the scientists could show that the twist of light itself, i.e. the screw-like structure, is maintained over a free-space propagation of 143 kilometers, which could revolutionize future data transmission.

Physics - Chemistry - 15.11.2016
Carbon Nanotubes Couple Light and Matter
With their research on nanomaterials for optoelectronics, scientists from Heidelberg University and the University of St Andrews (Scotland) have succeeded for the first time to demonstrate a strong interaction of light and matter in semiconducting carbon nanotubes. Such strong light-matter coupling is an important step towards realising new light sources, such as electrically pumped lasers based on organic semiconductors.

History / Archeology - Physics - 15.11.2016
Novel imaging approach reveals how ancient amulet was made
Novel imaging approach reveals how ancient amulet was made
At 6000 years old, this copper amulet is the earliest lost-wax cast object known. Now, researchers have finally discovered how it was made, using a novel UV-visible photoluminescence spectral imaging approach. All the parameters of elaboration process, such as the purity of the copper, and melting and solidification temperatures, are now accurately known.

Physics - Chemistry - 15.11.2016
A New Way to Image Solar Cells in 3-D
Next-generation solar cells made of super-thin films of semiconducting material hold promise because they're relatively inexpensive and flexible enough to be applied just about anywhere. Researchers are working to dramatically increase the efficiency at which thin-film solar cells convert sunlight to electricity.

Physics - Administration - 15.11.2016
Controlling Electrons in Time and Space
Controlling Electrons in Time and Space
Sharp metal needles can be used to emit electrons. A quantum effect opens up new possibilities of controlling electron emission with extremely high accuracy. In an electron microscope, electrons are emitted by pointy metal tips, that way the can be steered and controlled with high precision. Recently, such metal tips have also been used as high precision electron sources for generating x-rays.

Physics - Chemistry - 11.11.2016
Two Paths at Once: Watching the Buildup of Quantum Superpositions
Two Paths at Once: Watching the Buildup of Quantum Superpositions
Scientists observe how quantum superpositions build up in a helium atom within femtoseconds. Just like in the famous double-slit experiment, there are two ways to reach the final outcome. It is definitely the most famous experiment in quantum physics: in the double slit experiment, a particle is fired onto a plate with two parallel slits, so there are two different paths on which the particle can reach the detector on the other side.

Physics - Astronomy / Space Science - 10.11.2016
Simulations Show Swirling Rings, Whirlpool-Like Structure in Subatomic 'Soup'
Simulations Show Swirling Rings, Whirlpool-Like Structure in Subatomic ’Soup’
International team including Berkeley Lab researcher surprised by complex dynamics in model of quark-gluon plasma At its start, the universe was a superhot melting pot that very briefly served up a particle soup resembling a 'perfect,' frictionless fluid. Scientists have recreated this 'soup,' known as quark-gluon plasma, in high-energy nuclear collisions to better understand our universe's origins and the nature of matter itself.

Physics - Chemistry - 09.11.2016
Solar Cells Get Boost with Integration of Water-Splitting Catalyst onto Semiconductor
Solar Cells Get Boost with Integration of Water-Splitting Catalyst onto Semiconductor
Scientists have found a way to engineer the atomic-scale chemical properties of a water-splitting catalyst for integration with a solar cell, and the result is a big boost to the stability and efficiency of artificial photosynthesis. Led by researchers at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab), the project is described in a paper published this week .

Chemistry - Physics - 08.11.2016
Scientists probe underground depths of Earth’s carbon cycle
Carbon in the fluid of the Earth's mantle is not in the form of carbon dioxide but rather in carbonate and bicarbonate ions, researchers found. Understanding how carbon dissolves in water at the molecular level under extreme conditions is critical to understanding the Earth's deep carbon cycle'a process that ultimately influences global climate change.

Physics - 08.11.2016
Entering the field of zeptosecond measurement
Entering the field of zeptosecond measurement
Research news When light strikes electrons in atoms, their state can change unimaginably quickly. Laser physicists in Munich have measured such a phenomenon - namely that of photoionization, in which an electron exits a helium atom after excitation by light - for the first time with zeptosecond precision.

Physics - 07.11.2016
Watching Quantum Jumps
Watching Quantum Jumps
Scientists from TU Wien (Vienna, Austria) and Germany present the most accurate time measurements of quantum jumps to date. Quantum particles can change their state very quickly - this is called a 'quantum jump'. An atom, for example, can absorb a photon, thereby changing into a state of higher energy.

Physics - Electroengineering - 07.11.2016
Earth's magnetic field under the 'simulation magnifying glass'
Earth’s magnetic field under the ‘simulation magnifying glass’
Earth's magnetic field has reversed direction hundreds of times in the course of our planet's history.

Physics - Administration - 04.11.2016
Physicists gain insights into why materials break
New research suggests scientists could eventually help create materials that resist breaking or crack in a predictable fashion. Using both a simulation and artificial structures called metamaterials, scientists at the University of Chicago, New York University and Leiden University found material failure can be continuously tuned through changes in its underlying rigidity.

Physics - Computer Science - 03.11.2016
Scientists set traps for atoms with single-particle precision
Atoms, photons, and other quantum particles are often capricious and finicky by nature; very rarely at a standstill, they often collide with others of their kind. But if such particles can be individually corralled and controlled in large numbers, they may be harnessed as quantum bits, or qubits - tiny units of information whose state or orientation can be used to carry out calculations at rates significantly faster than today's semiconductor-based computer chips.

Life Sciences - Physics - 03.11.2016
Shaping up to make the cut
Shaping up to make the cut
Research news Before RNA copies of genes can program the synthesis of proteins, the non-coding regions are removed by the spliceosome, a complex molecular machine. The correct regulation of the splicing plays a central role for many cellular processes. By means of nuclear spin measurements and single-molecule fluorescence microscopy, a team of scientists has now discovered an unexpected mechanism in the assembly of the spliceosome.

Physics - Astronomy / Space Science - 03.11.2016
Researchers confirm decades-old theory describing principles of phase transitions
In an experiment at UChicago that witnessed a phase transition of quantum cesium atoms, an optical lattice lined the atoms up in patterns based on their positive or negative momentum. The lattice was shaken to drive the atoms across the phase transition and divide into different domains. New research conducted at the University of Chicago has confirmed a decades-old theory describing the dynamics of continuous phase transitions.

Physics - Chemistry - 03.11.2016
Nanostructures Made of Pure Gold
Nanostructures Made of Pure Gold
It is the Philosopher's Stone of Nanotechnology: using a technological trick, scientists at TU Wien (Vienna) have succeeded in creating nanostructures made of pure gold.