news

« BACK

Physics



Results 21 - 40 of 373.


Physics - Materials Science - 24.02.2020
Short film of a magnetic nano-vortex
Short film of a magnetic nano-vortex
For the first time, researchers at the Paul Scherrer Institute PSI have recorded a "3D film" of magnetic processes on the nanometer scale. This reveals a variety of dynamics inside the material, including the motion of swirling boundaries between different magnetic domains. The insights were gained with a method newly developed at the Swiss Light Source SLS.

Physics - Electroengineering - 19.02.2020
Time-resolved measurement in a memory device
Time-resolved measurement in a memory device
Researchers at ETH have measured the timing of single writing events in a novel magnetic memory device with a resolution of less than 100 picoseconds. Their results are relevant for the next generation of main memories based on magnetism. At the Department for Materials of the ETH in Zurich, Pietro Gambardella and his collaborators investigate tomorrow's memory devices.

Physics - Materials Science - 18.02.2020
Creating custom light using 2D materials
Creating custom light using 2D materials
Researchers from the University of Geneva and the University of Manchester have discovered structures based on two-dimensional materials that emit tailor-made light in any colour you could wish for. Finding new semi-conductor materials that emit light is essential for developing a wide range of electronic devices.

Materials Science - Physics - 13.02.2020
A fast light detector made of two-dimensional materials
A fast light detector made of two-dimensional materials
Two research groups at ETH Zurich have joined forces to develop a novel light detector. It consists of two-dimensional layers of different materials that are coupled to a silicon optical waveguide. In the future, this approach can also be used to make LEDs and optical modulators. Fast and highly efficient modulators as well as detectors for light are the core components of data transmission through fibre optic cables.

Physics - Materials Science - 12.02.2020
New quasiparticle unveiled in room temperature semiconductors
New quasiparticle unveiled in room temperature semiconductors
Physicists from Switzerland and Germany have unveiled fingerprints of the long-sought particle known as Mahan exciton in the room temperature optical response of the popular methylammonium lead halide perovskites. The optical properties of semiconductors are governed by the so-called 'excitons', which are bound pairs of negative electrons and positive holes.

Health - Physics - 11.02.2020
Bacteria under the microscope: a new growth model for tuberculosis
Bacteria under the microscope: a new growth model for tuberculosis
New research has shed light on how mycobacteria grow. This discovery could explain why some members of this family of single-celled organisms, which includes the bacillus that causes tuberculosis, can develop resistance to antibiotics For centuries, scientists have peered down the lens of a microscope and watched as bacteria - some circular, others rod-shaped - multiply before their eyes.

Physics - Materials Science - 07.02.2020
A novel formulation to explain heat propagation
A novel formulation to explain heat propagation
Researchers at EPFL and MARVEL have developed a novel formulation that describes how heat spreads within crystalline materials. This can explain why and under which conditions heat propagation becomes fluid-like rather than diffusive. Their equations will make it easier to design next-generation electronic devices at the nanoscale, in which these phenomena can become prevalent.

Physics - Innovation - 05.02.2020
A new substance prevents vascular calcification
The calcification of blood vessels and other soft tissues is problematic. Researchers at ETH Zurich and ETH spin-off Inositec have discovered a substance that prevents vascular calcification. Researchers at ETH Zurich and ETH spin-off Inositec have developed a new substance to prevent vascular calcification, which affects many patients suffering from chronic kidney disease.

Environment - Physics - 03.02.2020
What if half of Switzerland's rooftops produced electricity?
Researchers at EPFL are assessing Switzerland's solar power potential. Their results show that photovoltaic panels could be installed on more than half of the country's 9.6 million rooftops. The resulting power would meet more than 40% of Swiss electricity demand. The widespread installation of photovoltaic panels on building rooftops could play an important role in Switzerland's transition to a low-carbon energy system.

Health - Physics - 31.01.2020
Could resetting our internal clocks help control diabetes?
Could resetting our internal clocks help control diabetes?
Researchers from the University of Geneva and HUG were able to demonstrate the link between disturbances of the circadian clocks in pancreatic cells and type 2 diabetes, then to correct these disturbances. The circadian clock system (from Latin "circa diem", about a day) allows the organisms to anticipate periodical changes of geophysical time, and to adjust to these changes.

Health - Physics - 22.01.2020
Portable device helps doctors diagnose sepsis faster
Portable device helps doctors diagnose sepsis faster
EPFL researchers have developed a highly sensitive and portable optical biosensor that stands to accelerate the diagnosis of fatal conditions like sepsis. It could be used by ambulances and hospitals to improve the triage process and save lives. Sepsis claims one life every four seconds. It is the primary cause of death in hospitals, and one of the ten leading causes of death worldwide.

Physics - Chemistry - 20.01.2020
Platelets instead of spheres make screens more economical
Platelets instead of spheres make screens more economical
ETH scientists have further developed QLED technology for screens. They have produced light sources that for the first time emit high-intensity light in only one direction. This reduces scattering losses, which makes the technology extremely energy efficient. QLED screens have been on the market for a few years now.

Astronomy / Space Science - Physics - 15.01.2020
Interstellar journey of life's building block phosphorus unveiled
Interstellar journey of life’s building block phosphorus unveiled
Phosphorus, present in our DNA and cell membranes, is an essential element for life. But how it became available on the early Earth when life appeared here about 4 billion years ago is something of a mystery. For the first time, astronomers - among them researchers from the University of Bern - have now been able to show that molecules with phosphorus are formed in star-forming regions and probably came to Earth with comets.

Physics - 10.01.2020
Unexpected twist in a quantum system
Unexpected twist in a quantum system
Physicists at ETH Zurich have observed a surprising twist in a quantum system caused by the interplay between energy dissipation and coherent quantum dynamics. To explain it, they found a concrete analogy to mechanics. "No scientist thinks in formulae", Albert Einstein allegedly once told his colleague Leopold Infeld.

Physics - Astronomy / Space Science - 08.01.2020
A neural network as an anchor point
A neural network as an anchor point
Quantum mechanics is a well-established theory, but at a macroscopic level it leads to intractable contradictions. Now ETH physicists are proposing to resolve the problem with the aid of neural networks. Necessity is the mother of invention.

Physics - Mathematics - 07.01.2020
Indeterminist physics for an open world
Indeterminist physics for an open world
A physicist suggests that the mathematical language spoken by classical physics should be changed to make room for indeterminism and an open future. Classical physics is characterised by the precision of its equations describing the evolution of the world as determined by the initial conditions of the Big Bang - meaning there is no room for chance.

Physics - Chemistry - 10.12.2019
How to induce magnetism in graphene
How to induce magnetism in graphene
Graphene, a two-dimensional structure made of carbon, is a material with excellent mechanical, electronic and optical properties. However, it did not seem suitable for magnetic applications. Together with international partners, Empa researchers have now succeeded in synthesizing a unique nanographene predicted in the 1970s, which conclusively demonstrates that carbon in very specific forms has magnetic properties that could permit future spintronic applications.

Physics - Chemistry - 07.12.2019
Liquid flow is influenced by a quantum effect in water
Liquid flow is influenced by a quantum effect in water
Researchers at EPFL have discovered that the viscosity of solutions of electrically charged polymers dissolved in water is influenced by a quantum effect. This tiny quantum effect influences the way water molecules interact with one another. Yet, it can lead to drastic changes in large-scale observations.

Chemistry - Physics - 05.12.2019
First field measurements of laughing gas isotopes
First field measurements of laughing gas isotopes
Thanks to a newly developed laser spectrometer, Empa researchers can for the first time show which processes in grassland lead to nitrous oxide emissions. The aim is to reduce emissions of this potent greenhouse gas by gaining a better understanding of the processes taking place in the soil. Nitrous oxide (N2O, also known as laughing gas) is one of the most important greenhouse gases.

Physics - Materials Science - 29.11.2019
Controlling the optical properties of solids with acoustic waves
Controlling the optical properties of solids with acoustic waves
Physicists from Switzerland, Germany, and France have found that large-amplitude acoustic waves, launched by ultrashort laser pulses, can dynamically manipulate the optical response of semiconductors. One of the main challenges in materials science research is to achieve high tunability of the optical properties of semiconductors at room temperature.