Archive for the ‘materials’ category: Page 11

Jul 25, 2020

How About a Space Station at the Bottom of the Ocean?

Posted by in categories: health, materials

Jacques Cousteau’s grandson is pushing for the construction of a real-life Sealab 2021. The proposed undersea laboratory is so foreign to our idea of marine studies that it’s being likened to a space station that’s also under the ocean.

The station is named Proteus, not for the changing nature of matter (like a new uncuttable material with the same name), but for the shepherd of the sea. By placing a station 60 feet underwater around the Caribbean island of Curacao, sponsoring Northeastern University says it can reduce divers’ high amount of overhead time and reduce the danger of nitrogen-induced health effects.

Jul 25, 2020

Manipulating non-magnetic atoms in a chromium halide enables tuning of magnetic properties

Posted by in categories: materials, particle physics

The magnetic properties of a chromium halide can be tuned by manipulating the non-magnetic atoms in the material, a team, led by Boston College researchers, reports in the most recent edition of Science Advances.

The seemingly counter-intuitive method is based on a mechanism known as an indirect exchange interaction, according to Boston College Assistant Professor of Physics Fazel Tafti, a lead author of the report.

An indirect interaction is mediated between two magnetic atoms via a non-magnetic atom known as the ligand. The Tafti Lab findings show that by changing the composition of these ligand atoms, all the can be easily tuned.

Jul 24, 2020

Apple commits to carbon neutrality by 2030

Posted by in categories: materials, transportation

Apple, the world’s largest technology company by revenue, is already carbon neutral for its corporate facilities, a goal achieved in April 2020. However, the consumer electronics giant now intends to make every product and its entire supply chain – from manufacturing to transportation to end-of-life material recovery – net zero by 2030.

Jul 24, 2020

Fungus Growing at Chernobyl Could Protect Astronauts From Cosmic Rays

Posted by in category: materials

Easy Installation

The researchers also speculated about weaving some of the material into spacesuit fabric, New Scientist reports, but the main draw of their work is that damaged fungus shields would be able to grow back.

“What makes the fungus great is that you only need a few grams to start out,” Stanford researcher and study co-author Nils Averesch told New Scientist. “It self-replicates and self-heals, so even if there’s a solar flare that damages the radiation shield significantly, it will be able to grow back in a few days.”

Jul 24, 2020

A new MXene material shows extraordinary electromagnetic interference shielding ability

Posted by in categories: materials, physics

As we welcome wireless technology into more areas of life, the additional electronic bustle is making for an electromagnetically noisy neighborhood. In hopes of limiting the extra traffic, researchers at Drexel University have been testing two-dimensional materials known for their interference-blocking abilities. Their latest discovery, reported in the journal Science, is of the exceptional shielding ability of a new two-dimensional material that can absorb electromagnetic interference rather than just deflecting back into the fray.

The material, called carbonitride, is part of a family of , called MXenes, that were first produced at Drexel in 2011. Researchers have revealed that these materials have a number of exceptional properties, including impressive strength, and molecular filtration abilities. Titanium carbonitride’s exceptional trait is that it can block and absorb electromagnetic interference more effectively than any known material, including the metal foils currently used in most electronic devices.

“This discovery breaks all the barriers that existed in the electromagnetic shielding field. It not only reveals a shielding material that works better than copper, but it also shows an exciting, new physics emerging, as we see discrete two-dimensional materials interact with electromagnetic radiation in a different way than bulk metals,” said Yury Gogotsi, Ph.D., Distinguished University and Bach professor in Drexel’s College of Engineering, who led the research group that made this MXene discovery, which also included scientists from the Korea Institute of Science and Technology, and students from Drexel’s co-op partnership with the Institute.

Jul 23, 2020

Why This Stuff Costs $2700 Trillion Per Gram — Antimatter at CERN

Posted by in categories: materials, particle physics

Physics Girl is on Patreon! ►►

There’s a factory in Europe that makes antimatter! It’s the rarest, most expensive, and potentially the most dangerous material on earth. Scientists don’t know why this material is so rare. Anti-atoms took 72 years after we discovered antimatter to make. Why?

Continue reading “Why This Stuff Costs $2700 Trillion Per Gram — Antimatter at CERN” »

Jul 20, 2020

Scientists boost stability and efficiency of next-gen solar tech

Posted by in category: materials

Researchers from the Okinawa Institute of Science and Technology Graduate University (OIST) have created next-generation solar modules with high efficiency and good stability. Made using perovskites, these solar modules can maintain high performance for over 2000 hours. Their findings, reported 20 July 2020 in Nature Energy, have brightened prospects of commercialization.

Perovskites have the potential to revolutionize the solar technology industry. Flexible and lightweight, they promise more versatility than the heavy and rigid silicon-based cells currently dominating the market. But scientists must overcome some major hurdles before perovskites can be commercialized.

“There are three conditions that perovskites must meet: They must be cheap to produce, highly efficient and have a long lifespan,” said Professor Yabing Qi, head of the OIST Energy Materials and Surface Sciences Unit, who led this study.

Jul 20, 2020

A platinum and yttrium iron garnet-based structure produces a new magnetoresistance effect

Posted by in categories: materials, particle physics

In recent years, several research teams worldwide have been trying to develop a new class of devices known as spintronics or spin transport electronics. These devices can encode, store, process and transmit data using the spin of electrons in certain materials.

The operation of spintronics relies on magneto-transport effects, such as (GMR) and tunneling (TMR), which enable the transport of electrons through a given material in the form of a magnetic field. A device is generally made of two conductive ferromagnetic layers separated by a non-magnetic metal layer (i.e., a spin valve) or an insulator layer (i.e., a ).

Magneto-transport effects, which occur in a device’s spin valves and magnetic tunnel junctions, result in a relatively low resistance when the two magnetic layers are parallel and a relatively high resistance state when they are not. These effects are crucial to the functioning of many contemporary storage devices, including and magnetic random access memories (MRAMs).

Continue reading “A platinum and yttrium iron garnet-based structure produces a new magnetoresistance effect” »

Jul 20, 2020

Practical and versatile micro-patterning for organic electronics and photonics

Posted by in categories: computing, materials

Scientists have managed to draw at high resolution and speed, local patterns in organic semiconductor films used in optoelectronic and photonic applications. The new method enables the patterning of material characteristics and concomitant final properties, including molecular conformation, orientation, crystallinity and composition. The technique, published with open access in Nature Communications, has also been patented and industrial partners are sought for further co-development.

Bridging the gap between and the worldwide deployed silicon electronics requires new low cost and low energy consumption fabrication methods and technologies. This work represents a key enabling technology to accelerate the use of flexible and light-weight organic electronics and photonics to the level of silicon-based devices.

The microstructure and composition of organic semiconductors need to be tuned locally in order to optimize their properties, such as charge carrier mobility, electrical conductivity and light emission; and expand their functionalities for the practical upscaling of applications such as organic transistors (OFETs) and light emitting diodes (OLEDs), organic photovoltaics (OPV), organic thermoelectric generators (OTEGs), and organic photonic structures.

Jul 20, 2020

US20030067235A1 — Diamagnetic propulsion vehicle

Posted by in categories: materials, transportation

Omg levitating cars o,.o!

In this vehicle, the diamagnetic fields principles are applied to obtain a hovering and propulsion effect which makes low cost, friction free and zero pollutant emissions transport media. This is done using a special combination of electromagnetic and the natural diamagnetic susceptibility in all The physical effect of this is an air gap between the surface and the vehicle. The height of levitation has a direct relationship with the material used as floor surface; since all materials have diamagnetic susceptibility factors. Also, the power on the diamagnetic field is a key for the levitation and propulsion effect. All these factors make this prototype vehicle an easy maneuverable one, since there are almost no inertial forces in the system.

Page 11 of 116First89101112131415Last