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Archive for the ‘materials’ category: Page 272

Dec 21, 2016

Scientists detect a quantum crystal of electrons and ‘watch’ it melt

Posted by in categories: materials, quantum physics

For the first time, MIT physicists have observed a highly ordered crystal of electrons in a semiconducting material and documented its melting, much like ice thawing into water. The observations confirm a fundamental phase transition in quantum mechanics that was theoretically proposed more than 80 years ago but not experimentally documented until now.

The team, led by MIT professor of physics Raymond Ashoori and his postdoc Joonho Jang, used a spectroscopy technique developed in Ashoori’s group. The method relies on electron “tunneling,” a quantum mechanical process that allows researchers to inject electrons at precise energies into a system of interest—in this case, a system of electrons trapped in two dimensions. The method uses hundreds of thousands of short electrical pulses to probe a sheet of electrons in a cooled to extremely low temperatures, just above absolute zero.

With their tunneling technique, the researchers shot electrons into the supercooled material to measure the energy states of electrons within the semiconducting sheet. Against a background blur, they detected a sharp spike in the data. After much analysis, they determined that the spike was the precise signal that would be given off from a highly ordered crystal of electrons vibrating in unison.

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Dec 18, 2016

A New Kind of Computer Chip: Silicon May Be Replaced by New Material

Posted by in categories: computing, materials

At the forefront of computing technology for decades, silicon-based chips’ reign may soon end, as today’s chip designers are looking for other materials that offer more options and more amazing abilities than the silicon we all know and love.

This new trend has spurred the guys at Oak Ridge National Laboratory (ORNL) to develop what could be the foundation for multi-role computer chips.

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Dec 15, 2016

This Strange Material Could Reveal The Link Between Classical Physics And The Quantum Realm

Posted by in categories: materials, quantum physics

https://youtube.com/watch?v=8BhG9ir4-4E

With the help of this material, scientists are a little bit closer to unlocking the mystery of how the rules of the quantum realm translate to the rules of the classical physics of the observable world.

Experts predict that the materials used in this research, topological insulators, will play a key role in furthering this development.

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Dec 13, 2016

The power of polymeric coating

Posted by in categories: biotech/medical, materials

Nice write on polymeric coatings as a material option consider when developing implants replicating a natural electrode charge without creating damage or disruptions. Author proposes such materials could be leveraged beyond their use today and expanded to include BMI implants. Definitely, will take a closer look at.


Jeff Hendricks Biotectix outlines how polymeric coatings can help improve the performance of medical and consumer electronic devices.

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Dec 13, 2016

Scientists are Creating a New Diamond Predicted to be Harder Than a Jeweler’s Diamond

Posted by in categories: materials, nanotechnology

For all my Lab friends who utilize Spectrometers, drill bit fans as well as many of us QC fans. A new stronger syn. diamond being developed.


But you won’t find this diamond on any engagement rings — it will help cut through ultra-solid materials on mining sites.

Step aside, girls. Diamonds may now be a miner’s best friend, thanks to scientists from Australian National University (ANU).

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Dec 10, 2016

Thermoelectric paint generates electricity from almost any heat source

Posted by in categories: materials, particle physics

Thermoelectric generators convert heat or cold to electricity (and vice-versa). Normally solid-state devices, they can be used in such things as power plants to convert waste heat into additional electrical power, or in small cooling systems that do not need compressors or liquid coolant. However the rigid construction of these devices generally limits their use to flat, even surfaces. In an effort to apply thermal generation capabilities to almost any shape, scientists at the Ulsan National Institute of Science and Technology (UNIST) in Korea claim to have created a thermoelectric coating that can be directly painted onto most surfaces.

Variously known as the Peltier, Seebeck, or Thomson effect, the thermoelectric effect is seen in semiconductor devices that create a voltage when a different temperature is present on each side or, when a voltage is applied to the device, it creates a temperature difference between the two sides. In this instance, the new paint created by the UNIST researchers is used specifically to heat a surface when a voltage is applied.

The specially-formulated inorganic thermoelectric paint was created using Bi2Te3 (bismuth telluride) and Sb2Te3 (antimony telluride) particles to create two types of semiconducting material. To test the resultant mixture, the researchers applied alternate p-type (positive) and n-type (negative) layers of the thermoelectric semiconductor paint on a metal dome with electrodes at the top and the base of the dome.

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Dec 10, 2016

Light-bending material could bridge quantum and classical physics

Posted by in categories: materials, quantum physics

We’re closer than ever to a Theory of Everything.

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Dec 10, 2016

Nanogenerator Harvests Swipes To Power LCD Screens

Posted by in categories: energy, materials

https://youtube.com/watch?v=_-kkkNdbils

Harvesting human energy into devices.


Engineers find an alternate route toward self-powered devices with foldable material.

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Dec 5, 2016

This Battery Charges In Seconds, And Lasts All Week

Posted by in categories: materials, nanotechnology

It’s a super capacitor made with nano-materials, but all you need to know is—if it’s commercialized—your days of worrying about your battery might be over.

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Nov 30, 2016

Quantum obstacle course changes material from superconductor to insulator

Posted by in categories: materials, quantum physics

Researchers from Brown University have demonstrated an unusual method of putting the brakes on superconductivity, the ability of a material to conduct an electrical current with zero resistance.

The research shows that weak magnetic fields—far weaker than those that normally interrupt superconductivity—can interact with defects in a material to create a “random gauge field,” a kind of quantum obstacle course that generates resistance for superconducting electrons.

“We’re disrupting superconductivity in a way that people haven’t done before,” said Jim Valles, a professor of physics at Brown who directed the work. “This kind of phase transition involving a random gauge field had been predicted theoretically, but this is the first time it has been demonstrated in an experiment.”

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