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Smallest pixels ever created can illuminate color change buildings

1; one million times smaller than those in smartphones, which were made by capturing light sections under small gold stones – can be used for new types of large flexible screens, large enough to cover entire buildings. The color pixels, developed by a team of researchers led by the University of Cambridge, are compatible with roll-to-roll manufacturing on flexible plastic films, dramatically reducing their production cost. The results are reported in the journal Science Advances . It has been a long dream to imitate color-shifting skin in octopus or octopus, so that humans or objects disappear in the natural background, but it is still incredibly expensive to make large-scale flexible displays, as they are constructed of highly accurate multiple layers . At the center of the pixels developed by the Cambridge researchers, a small gold party is a few billions of a meter over. The grain sits on top of a reflective surface and sheds the light in the gap. Around each grain is a thin sticky coating that changes chemically when it is electrically switched, causing the pixel to change color over the spectrum. The research group, from various disciplines including physics, chemistry and manufacturing, made the pixels by coating vessels of grain with an active polymer called polyaniline and then spraying them on flexible mirror coated plastic to dramatically reduce the production cost. The pixels are the smallest yet created, one million times smaller than typical smartphone pixels. They can be seen in bright sunlight and because they…

1; one million times smaller than those in smartphones, which were made by capturing light sections under small gold stones – can be used for new types of large flexible screens, large enough to cover entire buildings.

The color pixels, developed by a team of researchers led by the University of Cambridge, are compatible with roll-to-roll manufacturing on flexible plastic films, dramatically reducing their production cost. The results are reported in the journal Science Advances .

It has been a long dream to imitate color-shifting skin in octopus or octopus, so that humans or objects disappear in the natural background, but it is still incredibly expensive to make large-scale flexible displays, as they are constructed of highly accurate multiple layers .

At the center of the pixels developed by the Cambridge researchers, a small gold party is a few billions of a meter over. The grain sits on top of a reflective surface and sheds the light in the gap. Around each grain is a thin sticky coating that changes chemically when it is electrically switched, causing the pixel to change color over the spectrum.

The research group, from various disciplines including physics, chemistry and manufacturing, made the pixels by coating vessels of grain with an active polymer called polyaniline and then spraying them on flexible mirror coated plastic to dramatically reduce the production cost.

The pixels are the smallest yet created, one million times smaller than typical smartphone pixels. They can be seen in bright sunlight and because they do not need constant power to maintain their color, have an energy performance that makes large areas possible and durable. “We started by washing them over aluminized food packages, but then it was found that aerosol spraying is faster,” says co-author author Hyeon-Ho Jeong from Cambridge Cavendish Laboratory.

“These are not normal tools for nanotechnology, but this kind of radical approach is needed to make sustainable technology possible,” said Professor Jeremy J Baumberg of the NanoPhotonics Center at the Cambridge Cavendish Laboratory, who led the research. The nanoscale allows it to be switched, although less than a tenth of the film is coated with our active pixels. This is because the bright size of each pixel of light is many times larger than their physical range when using these resonant gold architectures. “

The pixels can allow for a variety of new application possibilities, such as building size monitors, solar thermal load architecture, active camouflage clothing and coatings, and small indicators for accessing Internet-of-Things devices.

The team is currently working on to improve the color space and look for partners to further develop the technology.


First graph-based flexible display produced


More information:
“Scalable electrochromic nanopixels using plasmonics” Science Advances (2019). DOI: 10.1126 / sciadv.aaw2205, https://advances.sciencemag.org/content/5/5/eaaw2205

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University of Cambridge

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Smallest pixels ever created can lighten color changes (2019, May 10)
May 11, 2019
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