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Archive for the ‘materials’ category: Page 11

May 24, 2024

Lab-Grown Human Eyes Are Coming Into Focus

Posted by in categories: biotech/medical, materials

Year 2016 face_with_colon_three


Stem cell breakthrough grows new cornea material that restores some sight to blind rabbits in an experiment.

May 23, 2024

Repurposed beer yeast may offer a cost-effective way to remove lead from water

Posted by in category: materials

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Engineered yeast-containing hydrogel capsules could be used to remove lead from contaminated water rapidly and inexpensively. The work, from MIT and Georgia Tech researchers, could be especially useful in low-income areas with high lead contamination.

May 23, 2024

UChicago scientist seeks to make plastic more recyclable

Posted by in categories: engineering, materials

Editor’s note: This story is part of ‘Meet a UChicagoan,’ a regular series focusing on the people who make UChicago a distinct intellectual community. Read about the others here.

When asked to explain the difference between recyclable plastics, Pritzker School of Molecular Engineering graduate student Sam Marsden pulled out a paperclip chain and a length of small strings crudely knotted together.

The paperclip chain represented a highly recyclable plastic like the polyethylene terephthalate, or PET, found in soda bottles and the fibers in clothes. These can be broken down to the molecular level—ie., the individual paperclips—and rebuilt into like-new materials.

May 22, 2024

A Quartz Thermal Trap Harnessed the Sun—and Is About to Change Smelting Forever

Posted by in category: materials

Eco-friendly advancements promise a cleaner, greener approach to producing essential materials.

May 22, 2024

Researchers use microstructural modeling to optimize electrode materials for batteries

Posted by in categories: computing, materials

Which factors determine how quickly a battery can be charged? This and other questions are studied by researchers of Karlsruhe Institute of Technology (KIT) with the help of computer-based simulations.

May 21, 2024

New method may facilitate the use of graphene nanoribbons in nanoelectronics

Posted by in categories: materials, quantum physics

However, if long and thin strips of graphene (termed ) are cut out of a wide graphene sheet, the quantum become confined within the narrow dimension, which makes them semi-conducting and enables their use in quantum switching devices. As of today, there are a number of barriers to using graphene nanoribbons in devices, among them is the challenge of reproducibly growing narrow and long sheets that are isolated from the environment.

In this new study, the researchers were able to develop a method to catalytically grow narrow, long, and reproducible graphene nanoribbons directly within insulating hexagonal boron-nitride stacks, as well as demonstrate peak performance in quantum switching devices based on the newly-grown ribbons. The unique growth mechanism was revealed using advanced molecular dynamics simulation tools that were developed and implemented by the Israeli teams.

These calculations showed that ultra-low friction in certain growth directions within the boron-nitride crystal dictates the reproducibility of the structure of the ribbon, allowing it to grow to unprecedented lengths directly within a clean and isolated environment.

May 20, 2024

Scientists Uncover Unique New 1D Superconducting State

Posted by in categories: materials, quantum physics

A team led by Chen Xianhui and Professor Xiang Ziji from the CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics and the Department of Physics at the University of Science and Technology of China, uncovered a unique superconducting state characterized by one-dimensional superconducting stripes. This state is induced by the ferromagnetic proximity effect in an oxide heterostructure made up of ferromagnetic EuO and (110)-oriented KTaO3 (KTO). Their findings were published in Nature Physics.

The academic community concurs that the emergence of unconventional superconducting pairings is intricately linked to magnetism, particularly in copper oxides and iron-based high-temperature superconductors. Magnetic fluctuations are deemed pivotal in the genesis of high-temperature superconductivity, where the interplay between superconductivity and magnetism gives rise to superconducting states exhibiting unique spatial modulation. Superconducting oxide heterostructures encompassing magnetic structural units emerge as an optimal platform for investigating such superconducting states.

Building upon their prior achievements, the research team delved deeper into the superconductivity of this system and its relationship with the ferromagnetic proximity effect, meticulously adjusting the carrier concentration of the two-dimensional electron gas residing at the interface. They uncovered an intriguing in-plane anisotropy in superconductivity among samples with low carrier concentrations, which nevertheless vanished in samples exhibiting higher carrier concentrations.

May 20, 2024

Webb Captures Iconic Horsehead Nebula in Unprecedented Detail

Posted by in categories: materials, space travel

The NASA/ESA/CSA James Webb Space Telescope has captured the sharpest infrared images to date of one of the most distinctive objects in our skies, the Horsehead Nebula. These observations show a part of the iconic nebula in a whole new light, capturing its complexity with unprecedented spatial resolution.

Webb’s new images show part of the sky in the constellation Orion (The Hunter), in the western side of the Orion B molecular cloud. Rising from turbulent waves of dust and gas is the Horsehead Nebula, otherwise known as Barnard 33, which resides roughly 1,300 light-years away.

The nebula formed from a collapsing interstellar cloud of material, and glows because it is illuminated by a nearby hot star. The gas clouds surrounding the Horsehead have already dissipated, but the jutting pillar is made of thick clumps of material that is harder to erode. Astronomers estimate that the Horsehead has about 5 million years left before it too disintegrates. Webb’s new view focuses on the illuminated edge of the top of the nebula’s distinctive dust and gas structure.

May 19, 2024

Coal fly ash helps cut cement content by half in low-carbon concrete

Posted by in categories: engineering, materials

Concrete beams made using fly ash and pond ash in low-carbon concrete mix met Australian standards for engineering.

May 18, 2024

A History of Western Philosophy

Posted by in categories: materials, mathematics

“Mathematics, rightly viewed, possesses not only truth, but supreme beauty — a beauty cold and austere, like that of sculpture.”

- Bertrand Russell (1972 — 1970) A History of Western Philosophy

https://mathshistory.st-andrews.ac.uk/Biographies/Russell/

Continue reading “A History of Western Philosophy” »

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