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TECH SPACE
Nanoscale textures make glass invisible
by Brooks Hays
Washington (UPI) Oct 29, 2017


Scientists at Brookhaven National Laboratory's Center for Functional Nanomaterials have developed a new method for making glass more invisible.

Under most light conditions, glass gives its presence away with a slightly glare. Glare is helpful when you're trying to avoid a sliding glass door, but it can be distracting when you're trying to watch television during the day or use a computer outside.

Glare is created by light reflection. The amount light waves bend as they move through a material is called the refractive index. When light passes from glass to air, it experiences a sudden change in refractive index, causing some of the light to be reflected.

Scientists at Brookhaven found they could make the shift in reflective indexes more gradual by texturing glass surfaces with nanoscale patterns.

Researchers used the self-assembling pattern of molecules that form block copolymers as a template for texturing the glass. The repeating pattern features nanoscale cone-shaped structures. When applied to glass, the pattern almost completely removes surface reflections.

"We have eliminated reflections from glass windows not by coating the glass with layers of different materials but by changing the geometry of the surface at the nanoscale," Andreas Liapis, a postdoctoral lab researcher at CFN, said in a news release. "Because our final structure is composed entirely of glass, it is more durable than conventional antireflective coatings."

Tests showed the textured glass reduces glare without limiting the amount of light passing through. Tests also showed solar cells protected by a nanotextured glass cover outperformed those protected by a conventional glass cover.

Researchers described their new technology in a paper published this week in the journal Applied Physics Letters.

"Our role in the CFN is to demonstrate how nanoscience can facilitate the design of new materials with improved properties," said CFN Director Charles Black. "This work is a great example of that -- we'd love to find a partner to help advance these remarkable materials toward technology."

TECH SPACE
A quantum spin liquid
Chestnut Hill, MA (SPX) Oct 26, 2017
Researchers from Boston College and Harvard have created an elusive honeycomb-structured material capable of frustrating the magnetic properties within it in order to produce a chemical entity known as "spin liquid," long theorized as a gateway to the free-flowing properties of quantum computing, according to a new report in the Journal of the American Chemical Society. The first-of-its-ki ... read more

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Space Technology News - Applications and Research


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