Scientists have created the world’s smallest pixels, by trapping particles of light under tiny rocks of gold, that could be used for new types of large-scale flexible displays, big enough to cover entire buildings.
The colour pixels, developed by scientists from the University of Cambridge in the UK, are compatible with roll-to-roll fabrication on flexible plastic films, dramatically reducing their production cost.
It has been a long-held dream to mimic the colour-changing skin of octopus or squid, allowing people or objects to disappear into the natural background.
However, making large-area flexible display screens is still prohibitively expensive because they are constructed from highly precise multiple layers.
According to the research developed in the journal Science Advances, at the centre of the pixels is a tiny particle of gold a few billionths of a metre across.
The grain sits on top of a reflective surface, trapping light in the gap in between. Surrounding each grain is a thin sticky coating which changes chemically when electrically switched, causing the pixel to change colour across the spectrum.
“These are not the normal tools of nanotechnology, but this sort of radical approach is needed to make sustainable technologies feasible,” said Jeremy J Baumberg, a professor at University of Cambridge, who led the research.
“The strange physics of light on the nanoscale allows it to be switched, even if less than a tenth of the film is coated with our active pixels,” Baumberg said in a statement.
“That’s because the apparent size of each pixel for light is many times larger than their physical area when using these resonant gold architectures,” he said.
The pixels could enable a host of new application possibilities such as building-sized display screens, architecture which can switch off solar heat load, active camouflage clothing and coatings, as well as tiny indicators for coming internet-of-things devices.
The team of scientists, from different disciplines including physics, chemistry and manufacturing, made the pixels by coating vats of golden grains with an active polymer called polyaniline and then spraying them onto flexible mirror-coated plastic, to dramatically drive down production cost.
The pixels are the smallest yet created, a million times smaller than typical smartphone pixels. They can be seen in bright sunlight and because they do not need constant power to keep their set colour, have an energy performance that make large areas feasible and sustainable.
“We started by washing them over aluminised food packets, but then found aerosol spraying is faster,” said Hyeon-Ho Jeong from Cambridge.
The team is currently working at improving the colour range and are looking for partners to develop the technology further.
Novel microscope can non-invasively diagnose, treat diseases:Study
Scientists have developed a specialised microscope that has the potential to diagnose diseases like skin cancer as well as perform precise surgery without making any incisions in the skin.
According to the study published in the journal Science Advances, the microscope allows medical professionals to pinpoint the exact location of an abnormality, diagnose it and treat it instantly.
“Our technology allows us to scan tissue quickly, and when we see a suspicious or abnormal cell structure, we can perform ultra-precise surgery and selectively treat the unwanted or diseased structure within the tissue – without cutting into the skin,” said Yimei Huang from the University of British Columbia in Canada.
It could be used to treat any structure of the body that can be reached by light and requires extremely precise treatment, including nerves or blood vessels in the skin, eye, brain or other vital structures, researchers said.
“For diagnosing and scanning diseases like skin cancer, this could be revolutionary,” said Harvey Lui, professor at the University of British Columbia.
The study shows that the device allows imaging of living tissue up to about one millimetre in depth using an ultrafast infrared laser beam.
Researchers said that this microscope, however, is different from previous technology due to its capability to not only digitally scan living tissue, but also treat the tissue by intensifying the heat produced by the laser.
“We can alter the pathway of blood vessels without impacting any of the surrounding vessels or tissues,” said Lui.
The researchers also said that their aim is to make multiphoton microscope technology more versatile while also increasing its precision.
“We wanted to be able to identify what was happening under the skin from many different angles and to have the capability of imaging different body sites,” said Haishan Zeng from the University of British Columbia.
Developments of a miniature version of the telescope that could be used to perform microscopic examinations and treatment during endoscopy are also underway, researchers said.
“We are not only the first to achieve fast video-rate imaging that enables clinical applications, but also the first to develop this technology for therapeutic uses,” said Zeng
Black Shark 2 gaming smartphone coming to India on May 27:Report
After Asus and Nubia, Black Shark is set to launch a high-end gaming smartphone in India. According to BGR India, Black Shark has already started sending invites for the launch of Black Shark 2. The gaming phone will reportedly launch in India on May 27.
Black Shark 2 was launched in March and is already available for sale in China. The phone is the second-generation gaming smartphone and a follow-up to the Black Shark Helo.
This will be the first ever gaming smartphone from Black Shark to launch in the country. In case you are not aware, Black Shark is a sub-brand of Xiaomi.
As expected, this is a premium smartphone with top-of-the-line specifications. The device boasts a 6.39-inch AMOLED display with a 2340 x 1080 and a 19.5:9 aspect ratio. The entire display, according to the company, is pressure sensitive. This means gamers can map onto the display that reacts to different levels of pressure
Under the hood, it is powered by a Snapdragon 855 processor coupled with either 6GB RAM and 128GB of storage or 12GB RAM and 256GB of storage. There’s also a 4,000mAh battery with 27W fast charging support, a 48MP/12MP rear camera setup, and a 20MP front-facing camera.
It also features an in-display fingerprint scanner, similar to the OnePlus 7 Pro and Galaxy S10+. Black Shark 2 also comes with Liquid Cooling 3.0, a vapor cooling system similar to what the Razer Phone 2 uses. The company also plans to sell optional accessories with the Black Shark 2 in India.
The launch of Black Shark 2 comes at a time when the popularity of mobile games like PUBG and Fortnite at the all-time high in India. The gaming smartphone will take on the likes of the Asus ROG Phone and Nubia Red Magic. Interestingly, ZTE’s sub-brand Nubia is also expected to launch the Red Magic 3 in India in the coming days.
Tara Sutaria obsessed with makeup
Actress Tara Sutaria, who has wooed the audience with her stylish and glamorous looks in her debut film ‘Student of the Year 2’, says she loves to do makeup. “I am completely obsessed with makeup. I love to experiment different cosmetic products.
I even check social media to have a look at trending makeup and fashion styles…So that I don’t miss out anything,” Tara told IANS. She has also shared her own makeup style.
“During day time, I prefer to have a natural look…So I opt for minimal makeup. At night, I like to go a little bold,” added Tara, who has been appointed brand ambassador for the global brand, Bobbi Brown Cosmetics, in India. Ater putting on makeup, the 23-year-old makes sure to keep herself hydrated as much as possible.
“The most important thing to do is to keep youself hydrated. So when I apply makeup, I make sure to drink ample amount of water. And it is very much important to take off your makeup from your skin completely before heading to sleep. Cleansing, toning and moisturising is my skin care ritual.” On the work front, Tara will next be seen in ‘Marjaavaan’.