Results 61 - 80 of 369.
Materials Science - 22.02.2022
Silence on the tracks
Noise barriers or improved wheel systems and brakes that are less noisy are not the only ways to reduce railway noise for close-by residents. An inconspicuous component under the tracks is a source of hope for a research team including scientists. Railway noise is unhealthy. Hundreds of millions of Swiss francs have already been invested in noise barriers, quieter braking systems and other measures with the goal to protect at least 80 percent of the Swiss population from emissions by the year 2025 - but because railway traffic will continue to increase, a lot remains to be done.
Environment - Materials Science - 11.02.2022
Solar and wind power are key to decarbonising Switzerland
A team from the UNIGE and Empa demonstrate that a mix of photovoltaic and wind power is optimal for reducing the carbon footprint of Swiss electricity consumption . How can we reduce the carbon footprint of electricity consumption in Switzerland? The country relies on electricity imports from fossil fuel power plants, which are major emitters of greenhouse gases.
Materials Science - Chemistry - 09.02.2022
A new electrolyte for greener and safer batteries
A team from the University of Geneva has developed a new material that improves the performance of solid-state sodium batteries, a less dangerous and more durable alternative to lithium. The future of battery technologies lies in sodium. More sustainable than lithium - which currently powers most of our devices and vehicles - sodium is also abundant on the earth's surface.
Materials Science - 03.02.2022
Novel printing process switches materials from black to transparent
Researchers have developed a new type of printing process that involves removing material rather than depositing it.
Physics - Materials Science - 02.02.2022
Cooling matter from a distance
Researchers from the University of Basel have succeeded in forming a control loop consisting of two quantum systems separated by a distance of one meter. Within this loop, one quantum system - a vibrating membrane - is cooled by the other - a cloud of atoms, and the two systems are coupled to one another by laser light.
Physics - Materials Science - 21.01.2022
Quantum dots boost perovskite solar cell efficiency and scalability
Scientists at EPFL have boosted the efficiency and scalability of perovskite solar cells by replacing their electron-transport layers with a thin layer of quantum dots. Perovskites are hybrid compounds made from metal halides and organic constituents. They show great potential in a range of applications, e.g. LED lights, lasers, and photodetectors, but their major contribution is in solar cells, where they are poised to overtake the market from their silicon counterparts.
Physics - Materials Science - 22.12.2021
Semiconductors reach the quantum world
Quantum effects in superconductors could give semiconductor technology a new twist. Researchers at the Paul Scherrer Institute PSI and Cornell University in New York State have identified a composite material that could integrate quantum devices into semiconductor technology, making electronic components significantly more powerful.
Materials Science - Innovation - 20.12.2021
Shellac for printed circuits
Intelligent packaging with sensors that monitor goods, such as vegetables, on long transport routes is a trend for the future. Yet printed and disposable electronics also cause problems: Metals in printing inks are expensive - and disposing of them in an environmentally sound manner is costly and exacerbates the problem of electronic waste.
Materials Science - Environment - 16.11.2021
An ironclad future
Solar energy plays an important role in the fight against climate change as a substitute for fossil fuels. Dye-sensitized solar cells promise to be a low-cost supplement to the photovoltaic systems we know today. Their key feature is the dye sensitizers attached to their surface. Researchers at the University of Basel continue to improve the performance with sensitizers using iron - a commonly available and environmentally friendly metal.
Materials Science - Innovation - 11.11.2021
Teaching fungi how to write
Spalted wood is a highly sought-after material in the high-end furniture industry. In a newly developed process, scientists have succeeded at controlling the spread of fungi in native wood types to create elaborate marblewood pictures - and even taught the fungi to write some words. Fine black lines spread elegantly across the clock face made from pale, fine-grained timber of ash, beech and maple.
Physics - Materials Science - 10.11.2021
New imaging method gives live glimpse into how cells work
By combining two microscopy methods, researchers are able to see what is happening inside a cell and on its membrane simultaneously, giving unprecedented insight into the cellular processes that occur during infection, for example. Cells are the fundamental component of living organisms and play host to a number of complex biological phenomena.
Physics - Materials Science - 14.10.2021
Exotic magnetic states in miniature dimensions
Led by scientists at Empa and the International Iberian Nanotechnology Laboratory, an international team of researchers from Switzerland, Portugal, Germany, and Spain have succeeded in building carbon-based quantum spin chains, where they captured the emergence of one of the cornerstone models of quantum magnetism first proposed by the 2016 Nobel laureate F. D.
Materials Science - Architecture - 06.10.2021
Light construction, efficient operation
Boasting an intricate, doubly curved concrete roof, lightweight funicular floors, and self-learning building technology, the latest addition to Empa and Eawag's NEST research building in Duebendorf, Switzerland officially opened today. The innovative unit illustrates nearly a decade of formative ETH Zurich research in architecture and sustainable technologies.
Physics - Materials Science - 02.09.2021
Photovoltaic perovskites can detect neutrons
A simple and cheap device for detecting neutrons has been developed by a team of researchers and their collaborators. The device, based on a special class of crystalline compounds called perovskites, could be used to quickly detect neutrons coming from radioactive materials, e.g. a nuclear reactor that has been damaged or that is being transported nefariously, the researchers say.
Chemistry - Materials Science - 20.08.2021
Changes in colour indicate deformations
Researchers have developed a new type of laminate that changes colour as soon as the material is deformed. This way, the materials researchers can kill two birds with one stone: a lightweight composite material that inspects itself. Lightweight construction has found its way into many areas, especially automotive manufacturing, shipbuilding and aircraft construction.
Materials Science - Health - 19.08.2021
Band-aid for internal wounds
Closing wounds in the digestive tract is a challenge. researchers have now developed a polymer patch for the intestine that can be used to stably bond and seal internal injuries. A burst appendix or a life-threatening intestinal volvulus are emergencies that need to be treated by surgeons immediately.
Materials Science - Economics - 15.07.2021
Filled energy saving bar
Insulation webs are essential in aluminum window profiles and facades for good thermal insulation. researchers and their partners have been working for some time on a novel "sandwich" product with an environmentally friendly filling: recycled material from PET bottles. Now the market launch is approaching - with good prospects of success.
Materials Science - Environment - 05.07.2021
A jacket from a jacket from a jacket
Manufacture, wear, wash, incinerate: This typical life cycle of garments, which pollutes the environment, is to be changed in the future - towards principles of circular economy with recycling at its core. Using an outdoor jacket made from PET bottles and recycled materials, researchers have investigated whether the product actually delivers what the idea promises.
Materials Science - 30.06.2021
Prestressed plasters for old buildings
The technology of stabilizing concrete structures with carbon fiber-reinforced polymers, thus helping them to last longer, was developed decades ago; among others at Empa. Today, researchers in Dübendorf are working on a new variant with prestressed lamellas - with good prospects for practical application.
Environment - Materials Science - 25.06.2021
Crown ethers improve perovskite solar cell stability
Scientists have used an unprecedented method with multimodal host-guest complexation to greatly improve the stability of perovskite solar cells while also reducing the release of lead into the environment. Perovskites are hybrid compounds made from metal halides and organic constituents, and show great potential in a range of applications, e.g. LED lights, lasers, and photodetectors.