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Process is cheap and more environmentally friendly, say researchers.

Research of landmine detection using terahertz technology.

Scientific. Net, the trademark of Trans Tech Publications Ltd., is one of the largest web resources, publishes peer-reviewed academic journals and book series in field of materials science and engineering.

Materials scientists aim to engineer intelligence into the fabric of materials or metamaterials for programmable functions. Engineering efforts can vary from passive to active forms to develop programmable metasurfaces using dynamic and arbitrary electromagnetic (EM) wavefields. Such metasurfaces, however, require manual control to switch between functions. In a new study now published on Light: Science & Applications, Qian Ma and an interdisciplinary research team in the State Key Laboratory, Cyberspace Science and Technology, and the Department of Electronics in China engineered a smart metasurface for self-adaptive programmability.

Circa 2016

Not all important scientific research is cool looking, or has a cool name. But now and then you get something with both. These self-assembling carbon nanotubes are created with a process called Teslaphoresis. If you’ve read a more impressive-sounding sentence today, I’d like to hear it.

Even the lab of Rice University chemist Paul Cherukuri looks like a proper mad scientist’s lair. But don’t let the flashy trappings fool you: this is a very significant development.

Continue reading “Teslaphoresis-activated self-assembling carbon nanotubes look even cooler than they sound” »

Researchers have designed a new way to make concrete that would make frustrating cracks a thing of the past.

We report terahertz (THz) light-induced second harmonic generation, in superconductors with inversion symmetry that forbid even-order nonlinearities. The THz second harmonic emission vanishes above the superconductor critical temperature and arises from precession of twisted Anderson pseudospins at a multicycle, THz driving frequency that is not allowed by equilibrium symmetry. We explain the microscopic physics by a dynamical symmetry breaking principle at sub-THz-cycle by using quantum kinetic modeling of the interplay between strong THz-lightwave nonlinearity and pulse propagation. The resulting nonzero integrated pulse area inside the superconductor leads to light-induced nonlinear supercurrents due to subcycle Cooper pair acceleration, in contrast to dc-biased superconductors, which can be controlled by the band structure and THz driving field below the superconducting gap.

Researchers have designed a new way to make concrete that would make frustrating cracks a thing of the past.

So everybody likes to ride the roads, but no one likes to endure the roadwork. Sound familiar? We have all found ourselves shaking a fist or two at some construction workers, maybe even pointing our favorite finger at them to drive home the point of our frustration. If only there were a way to lay pavement in a quick, efficient manner? You know, something that had the style and panache of R2D2 that operated with the work ethic of your grandfather.

Well, check out this little wonder. Known as the Fastlane Paver, it is produced by Volvo and works quite well. Most paving machines will lay asphalt or concrete, then get smoothed out by a Caterpillar Steam roller or tamping machine to make the surface smooth and drivable. Not the case with the Fastlane though. It is an all in one paver. Capable of laying aggregate and pervious concrete, this machine can lay down a three meter wide strip at a distance of 18 lineal meters without stopping. Yep, you read that right. It does all of this in one pass, with no break.

A group of scientists from NUST MISIS developed a ceramic material with the highest melting point among currently known compounds. Due to the unique combination of physical, mechanical and thermal properties, the material is promising for use in the most heat-loaded components of aircraft, such as nose fairings, jet engines and sharp front edges of wings operating at temperatures above 2000 degrees C. The results are published in Ceramics International.