БЛОГ

Archive for the ‘materials’ category: Page 39

Apr 19, 2024

Quantum Barkhausen noise detected for the first time

Posted by in categories: materials, quantum physics

Quantum Barkhausen noise, which arises from the cooperative quantum tunnelling of a huge number of magnetic spins, has been observed for the first time and may be the largest macroscopic quantum phenomena ever seen.


Researchers in the US and Canada have detected an effect known as quantum Barkhausen noise for the first time. The effect, which comes about thanks to the cooperative quantum tunnelling of a huge number of magnetic spins, may be the largest macroscopic quantum phenomena yet observed in the laboratory.

In the presence of a magnetic field, electron spins (or magnetic moments) in a ferromagnetic material all line up in the same direction – but not all at once. Instead, alignment occurs piecemeal, with different regions, or domains, falling into line at different times. These domains influence each other in a way that can be likened to an avalanche. Just as one clump of snow pushes on neighbouring clumps until the entire mass comes tumbling down, so does alignment spread through the domains until all spins point in the same direction.

Continue reading “Quantum Barkhausen noise detected for the first time” »

Apr 18, 2024

3D-printed “metamaterial” is stronger than anything in nature

Posted by in categories: biotech/medical, materials

Using lasers and metal powder, Australian scientists have created a super strong, super lightweight new — but they got the idea for this sci fi-sounding creation from plants.

The challenge: Materials that are strong yet lightweight, such as carbon fiber and graphene, are used to make everything from medical implants to airships, and developing ones with ever greater “strength-to-weight ratios” is the goal of many material scientists.

In pursuit of that goal, some have turned to nature, looking for ways to replicate in metal the hollow lattice structures, like those in the Victoria water lily, that make some plants remarkably strong.

Apr 18, 2024

Farewell to metals in industry forever: the material that science fiction predicted and has just been produced

Posted by in categories: futurism, materials

A new, microscopic material will end with metals in industry: this is the new futuristic alternative that you will see from now on.

Apr 17, 2024

Scientists finally make ‘goldene’, potentially breakthrough new material

Posted by in categories: materials, particle physics

I found this on NewsBreak: Scientists finally make ‘goldene’, potentially breakthrough new material.


Researchers have managed to create “goldene”, an incredibly thin version of gold.

The work follows the successful production of graphene, which is made out of a single layer graphite atoms. That has been hailed as a miracle material: it is astonishingly strong, and much better at conducting heat and electricity than copper.

Continue reading “Scientists finally make ‘goldene’, potentially breakthrough new material” »

Apr 17, 2024

Scientists Invented a Bizarre New Material That Gets Tougher When You Hit It

Posted by in categories: materials, wearables

I found this on NewsBreak: Scientists Invented a Bizarre New Material That Gets Tougher When You Hit It.

Apr 13, 2024

Metasurface antenna could enable future 6G communications networks

Posted by in categories: internet, materials

A team led by researchers from the University of Glasgow has developed an innovative wireless communications antenna that combines the unique properties of metamaterials with sophisticated signal processing to deliver a new peak of performance.

Apr 12, 2024

Novel hydrogel removes microplastics from water

Posted by in categories: health, materials

Microplastics pose a great threat to human health. These tiny plastic debris can enter our bodies through the water we drink and increase the risk of illnesses. They are also an environmental hazard; found even in remote areas like polar ice caps and deep ocean trenches, they endanger aquatic and terrestrial lifeforms.

Apr 12, 2024

North America just got a new recycled Li-ion battery materials plant

Posted by in categories: materials, sustainability

Green Li-ion has launched a commercial-scale plant to process unsorted battery waste, or “black mass,” from used lithium-ion batteries.

Within an existing recycling facility in Atoka, Oklahoma, the plant will produce sustainable, battery-grade cathode precursor, lithium, and anode materials – closing the EV recycling loop with the production done all in one plant.

The current recycling process for spent lithium-ion batteries in North America includes sorting batteries before shredding, which are then processed into black mass and further into sulfates. The material is then exported overseas, most often to China and South Korea, for further processing.

Apr 11, 2024

Laser-patterned thin films that swell into kirigami-like structures offer new opportunities in hydrogel technology

Posted by in category: materials

New options for making finely structured soft, flexible and expandable materials called hydrogels have been developed by researchers at Tokyo University of Agriculture and Technology (TUAT).

Apr 11, 2024

Efficiency boost: Dual light pulses minimize energy for phase transitions

Posted by in categories: energy, materials

Notably, while other scientists have observed similar phenomena in their laboratory data, the mechanisms behind these observations remained elusive until now. Allan Johnson and his collaborators have elucidated the underlying processes, highlighting the formation of polarons and their ordering in specific directions as a key factor in reducing the energy penalty to the metallic phase. Driving the phase transition by exciting this disordered state of motion can be achieved with less energy.

Furthermore, the dynamic barrier lowering means that scientists are able to selectively reduce the required for the laser driven phase transition without increasing the probability of thermal switching, in contrast to other methods for improving the efficiency.

The results have been published in Nature Physics. The implications of this research extend beyond fundamental science, offering new avenues for precise material control and technological innovation. As the team continues to optimize the method and explore new , the potential for transformative advancements in material science and optical control remains high.

Page 39 of 300First3637383940414243Last