Archive for the ‘materials’ category

May 24, 2023

A new material creates clean electricity from the air around it

Posted by in category: materials

Engineers have created a thin film that can generate millivolts of electricity from ambient air humidity thanks to water’s ‘mean free path.’

May 24, 2023

Robots Level Up: AI Helps Them Understand Material Composition

Posted by in categories: materials, robotics/AI


However, there’s one challenge they still face: understanding the materials they interact with.

May 21, 2023

Alleged Apple Mixed Reality Headset Material Cost Leaks Out

Posted by in categories: augmented reality, materials

Self-described mixed reality nerd, Brad Lynch, has tweeted out several interesting details about Apple’s yet-to-be announced VR/AR headset. He has managed to compile information from several sources — mostly reports produced by hardware analysts based in China. His summation of the leaked info states: “The Apple HMD’s Bill of Materials (BoM) cost to be about $1500–1600 (USD). This is about double the reported BoM for the (Meta) Quest Pro (which was 800 dollars including the controllers and charging pad).”

May 18, 2023

Low-Carbon Concrete Could Bring a ‘Radical Change’ to the Industry

Posted by in categories: materials, policy

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May 16, 2023

Physicists Make Matter out of Light to Find Quantum Singularities

Posted by in categories: materials, quantum physics

Experiments that imitate solid materials with light waves reveal the quantum basis of exotic physical effects.

May 16, 2023

3D printing of unsupported multi-scale and large-span ceramic via near-infrared assisted direct ink writing Communications

Posted by in categories: 3D printing, materials

In the three-dimensional printing process of ceramic with low-angle structures, additional supporting structures are usually employed to avoid collapse of overhanging parts. However, the extra supporting structures not only affect printing efficiency, but the problems caused by their removal are also a matter of concern. Herein, we present a ceramic printing method, which can realize printing of unsupported multi-scale and large-span ceramics through the combination of direct ink writing and near-infrared induced up-conversion particles-assisted photopolymerization. This printing technology enables in-situ curing of multi-scale filaments with diameters ranging from 410 µm to 3.50 mm, and ceramic structures of torsion spring, three-dimensional bending and cantilever beam were successfully constructed through unsupported printing. This method will bring more innovation to the unsupported 3D manufacturing of complex shape ceramics.

In 3D ceramic printing, the need for additional supports can increase processing time and introduce defects during post-processing removal. Here, authors merge direct ink writing and up-conversion particles-assisted photopolymerization under near-infrared irradiation for support-free printing with controlled curing rates reducing material waste, printing time, and post-processing steps.

May 14, 2023

Researchers discover superconductive images are actually 3D and disorder-driven fractals

Posted by in categories: materials, quantum physics

Meeting the world’s energy demands is reaching a critical point. Powering the technological age has caused issues globally. It is increasingly important to create superconductors that can operate at ambient pressure and temperature. This would go a long way toward solving the energy crisis.

Advancements with superconductivity hinge on advances in . When electrons inside of quantum materials undergo a phase transition, the electrons can form intricate patterns, such as fractals. A fractal is a never-ending pattern. When zooming in on a fractal, the image looks the same. Commonly seen fractals can be a tree or frost on a windowpane in winter. Fractals can form in two dimensions, like the frost on a window, or in three-dimensional space like the limbs of a tree.

Dr. Erica Carlson, a 150th Anniversary Professor of Physics and Astronomy at Purdue University, led a team that developed theoretical techniques for characterizing the fractal shapes that these electrons make, in order to uncover the underlying physics driving the patterns.

May 13, 2023

The Graphene Era: 200x Stronger Than Steel, 5x Lighter Than Aluminum And The Best Conductivity Of Any Material

Posted by in categories: innovation, materials

Graphene, by all metrics, is a revolutionary material producing some unbelievable results. Avadain has developed a patented breakthrough technology for producing industrial volumes of large, thin, and nearly defect-free graphene flakes, addressing the $100B market demand for this revolutionary material.

May 11, 2023

Researchers discover liquid quasicrystal with dodecagonal tiling pattern

Posted by in categories: chemistry, materials

An unusual quasicrystal has been discovered by a team from the Martin Luther University Halle-Wittenberg (MLU), the University of Sheffield and Xi’an Jiaotong University. It has a dodecagonal honeycomb structure that has never been seen before. Until now, similar quasicrystals were only known to come in a solid—not liquid—form. The team presents its results in the journal Nature Chemistry.

Quasicrystals have a special structure. They have a regular pattern similar to normal crystals, however, in normal crystals, the arrangement of the individual components is repeated over and over at . In the case of quasicrystals, the components do not fit together in such a periodic pattern. This special structure gives them special properties that normal crystals do not have.

The newly discovered consists of dodecagons, which in turn are made up of a mixture of triangular, square and, for the first time, trapezoidal shaped cells. These are generated from the self-assembly of “T-shaped” molecules. “We have discovered a perfectly ordered liquid quasicrystal. Such a material has never been seen before,” says chemist Professor Carsten Tschierske at MLU.

May 11, 2023

Team discovers long-range skin Josephson supercurrent across van der Waals ferromagnet

Posted by in category: materials

In a study published in Nature Communications, Prof. Xiang Bin’s group from University of Science and Technology of China of the Chinese Academy of Sciences, in collaboration with Assoc. Prof. Wang Zhi from Sun Yat-sen University, discovered the long-range skin Josephson supercurrent across a van der Waals ferromagnet.

They bridged two spin-singlet superconductors NbSe2 (S) by constructing the van der Waals metal Fe3GeTe2 (F), and observed long-range supercurrent in the lateral Josephson junction (S/F/S) for the first time, which exhibits astonishing skin characteristics.

Ferromagnetism and superconductivity are two antagonistic macroscopic orderings. When the singlet supercurrent enters the ferromagnet, rapid decoherence of the Cooper pairs will be triggered.

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