Menu

Blog

Archive for the ‘materials’ category: Page 255

Nov 9, 2016

IF solid metallic hydrogen is a really good room temperature superconductor

Posted by in categories: materials, physics

On October 5th 2016, Ranga Dias and Isaac F. Silvera of Lyman Laboratory of Physics, Harvard University released the first experimental evidence that solid metallic hydrogen has been synthesized in the laboratory.

It took 495 GPa pressure to create. The sample is being held in the cryostat in liquid nitrogen.

If as predicted by theory the metallic hydrogen remains metastable when the extreme pressure is removed then the world will eventually be greatly changed.

Continue reading “IF solid metallic hydrogen is a really good room temperature superconductor” »

Nov 7, 2016

Hypersonic Flight Is Coming: Will the US Lead the Way?

Posted by in categories: materials, transportation

MOJAVE, California — The world is at the start of a renaissance in supersonic and hypersonic flight that will transform aviation, but the effort will need steady commitment and funding if the United States wants to lead the way, congressional leaders and industry officials said at a forum late last month.

“What’s exciting about aerospace today is that we are in a point here where suddenly, things are happening all across the board in areas that just haven’t been happening for quite a while,” said former U.S. Air Force Maj. Gen. Curtis M. Bedke.

“There was a period where engine technology had just sort of stagnated — a point where all materials technology was going along at about the same pace,” Bedke added. “There just wasn’t much happening. But suddenly, in all sorts of areas that apply to aerospace, things are happening.” [NASA’s Vision of Future Air Travel (Images)].

Continue reading “Hypersonic Flight Is Coming: Will the US Lead the Way?” »

Nov 6, 2016

Metallic hydrogen is metastable could be used as superlightweight structural material for floating cities

Posted by in category: materials

Metallic hydrogen has been created in a diamond anvil in a Harvard lab.

Diamond anvil cells can use only vanishingly small sample sizes. A typical amount is about 160 cubic micrometers.

If metallic hydrogen is metastable then there are a lot of potential applications.

Continue reading “Metallic hydrogen is metastable could be used as superlightweight structural material for floating cities” »

Nov 3, 2016

Magnetic ink brings printable and self-healing electronics together

Posted by in categories: electronics, materials

Engineers from the University of California, San Diego have brought together a couple of nascent technologies that could result in inexpensive and long-lasting electronic devices. The team created a magnetic ink that can print a variety of self-healing components.

The ink is loaded with inexpensive microparticles made of neodymium that are magnetically oriented in such a way that if the material rips, each side of the tear is attracted to the other. This allows components printed with the ink to self-repair tears as wide as 3 mm, which the researchers claim is a new record.

Continue reading “Magnetic ink brings printable and self-healing electronics together” »

Oct 26, 2016

New metamaterial shrinks when the heat is on

Posted by in categories: 3D printing, materials

It’s one of the basic facts of science: Heat something and it expands. But a team of US scientists has gone counterintuitive and invented a 3D-printed material that shrinks when heated. Developed as part of DARPA’s program to study materials with controlled microstructure architecture, the lightweight metamaterial exhibits what the researchers call “negative thermal expansion.”

Metamaterials are one of those things that come out of the lab with an air of enchantment about them. Basically, they’re made up of composite materials, like metals, plastics, or ceramics, engineered into repeating, microscopic structures. Depending on how these structures are designed, they can give the metamaterial properties that aren’t found in nature and may not even be derived from the source materials themselves.

The study by a team from the Lawrence Livermore National Laboratory’s (LLNL) Additive Manufacturing Initiative in partnership with the University of Southern California, MIT, and the University of California, Los Angeles, used a 3D printing process called projection microstereolithograpy to form a polymer and a polymer/copper composite into a highly complex 3D bi-material microlattice structure. To put it more simply, they printed a material made of two substances to form a pattern by printing out the polymer in a layer, cleaning the surface to avoid contamination, then printing the polymer/copper composite, then repeating.

Read more

Oct 25, 2016

‘Atomic sandwich’ computing material uses 100 times less energy

Posted by in categories: computing, materials

New magnetoelectric multiferroic material operates at 100 times lower power (credit: Julia A. Mundy/Nature)

Lawrence Berkeley National Laboratory scientists have developed a new “magnetoelectric multiferroic*” material that could lead to a new generation of computing devices with more computing power while consuming a fraction of the energy that today’s electronics require.

Read more

Oct 25, 2016

Vantablack, the Darkest Material Ever Made, Absorbs 99.965% Of Light

Posted by in category: materials

Read more

Oct 23, 2016

Why Space Elevators Could Be the Future of Space Travel

Posted by in categories: materials, space travel

In Brief:

  • Expensive, unsustainable rockets have served as our primary means to exit Earth, but space elevators present a cheaper way to enter outer space.
  • Although new materials are needed, space elevator missions are in motion and we could see the first elevator constructed in the next several decades.

Getting into space with rockets is ridiculously expensive. A NASA Inspector General report says the agency will pay Russia $491.2 million to send six astronauts into space in 2018. That’s almost $82 million a seat.

Read more

Oct 18, 2016

Graphene Enables Battery Breakthough Says Fisker

Posted by in categories: materials, nanotechnology

Henrik Fisker’s new battery company — Fisker Nanotech — says it has found a way to combine supercapacitors and batteries and produce them inexpensively.

Read more

Oct 18, 2016

Graphene and Quantum Dots Come Together to Create “Hybrid” Tech

Posted by in categories: materials, quantum physics

In Brief:

This new development in photoelectronics makes the technology more cost (and quantum) efficient. This opens ways for graphene to be further integrated in the field of photoelectronics.

EICREA professors Frank Koppens and Gerasimos Konstantatos led researchers in the ICFO in developing a hybrid photodetector that is better-performing in terms of speed, accuracy and range, and operates in the visible spectrum, near infrared (NIR) and short-wave infrared (SWIR), with wavelengths ranging from 400 to 3000 nm.

Continue reading “Graphene and Quantum Dots Come Together to Create ‘Hybrid’ Tech” »