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Flexible nano-thin touchscreen

20.01.2020

Touch screens of smartphones and displays have firmly entered our lives. It remains to make them even better - brighter, stronger, more flexible, more reliable and cheaper. Now scientists from Australia can suggest improvements on each of the points listed above.

A team of Australian scientists from the University of New South Wales, Monash University and the ARC Center of Excellence for Low Energy Electronics Technology (FLEET) published in the journal Nature Electronics the results of research in which they learned how to create the thinnest electrically conductive film, the properties of which allow it to serve as a touch screen. . It is alleged that the film is obtained almost atomic thickness.

Several layers of such a film can be used to create flexible touch screens for smartphones or displays, the transparency of which will be higher than traditional touchscreens made from modern indium-tin oxide (ITO) films. Conventional ITO touch screens absorb up to 10% of display backlight light. The 2D film proposed by scientists (which indicates the thickness of its layer) absorbs only 0,7% of light. Obviously, this transparency can be converted into a smartphone battery reserve, which will simply allow devices to work longer with a lower backlight brightness.

Even more useful, the production process of the ultra-thin touchscreen is very simple. As scientists joke, you can cook it yourself in your kitchen from the available ingredients. It is necessary to heat the alloy of tin and indium to 200 ° C, and as soon as they become liquid, roll the melt into a thin layer on a silicone mat. Seriously speaking, the proposed technical process involves the roll production of a thin film for the touchscreen using a method similar to printing newspapers in printing houses. It turns out much cheaper and without maintaining a vacuum, as required by the modern technical process for the production of "thick" touchscreens from ITO.

At the moment, scientists are trying to get a patent for their invention and are preparing to release prototypes of touchscreens of "nanometer" thickness. If they succeed, the technology could find applications not only in smartphones, but also in broad areas of optoelectronics, solar panels and smart indoor windows.

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Random news from the Archive

TV damages the brain 11.12.2015

We hear so often about the harm from the TV that someone might have a question - is there any evidence of this very harm?

The study by Kristine Yaffe of the University of California at San Francisco involved more than 3 people aged 000 to 18 who were followed for 30 years: they were regularly asked how much time they spend in front of the TV, and Do they do any physical exercise? Then, after 25 years, they were asked to perform a series of cognitive tasks that could be used to determine the speed of assimilation of information, verbal memory (that is, how much of what was said a person can keep in mind at a time) and the ability to organize their own activities (that is, the ability to plan, distribute attention between different tasks, etc.).

The results were as follows: those who spent three or more hours in front of the TV daily, in tests of mental abilities (not in all, but in several), showed lower results than others. Those who exercised little—exercise was measured by time and intensity—showed poor results on any one of the tests. As for those who also watched a lot of TV, and at the same time neglected physical education, the likelihood that they would fail any of the tests was doubled.

On the one hand, here, of course, the participants' own answers were taken into account, that is, their reports about how much time they watch TV and how often they exercise can be subjective. On the other hand, they were observed for quite a long time - as much as 25 years. The authors of the work themselves cannot say what specific physiological mechanisms link the time spent in front of the TV and the deterioration of mental abilities (note that such a deterioration happened in not quite old people).

The content of the TV programs in this case was not followed, so, obviously, the whole point here is the notorious inactivity; one must think that sitting in front of a computer or laptop monitor for a long time can lead to exactly the same consequences. From this point of view, there is nothing new here - there are a lot of works on the correlation between physical education, sports, yoga, and so on. and brain state. Exercise is known to help the brain fight aging by providing a good blood supply to areas of the brain that are critical for higher cognitive tasks.

And long daily walks improve memory in older people. However, most of these studies are carried out rather quickly, and they usually focus on the elderly. As for long-term projects, like the one we described above, they are, for obvious reasons, performed much less often, but the results they look more convincing - and more frightening: it turns out that you need to think about the state of your own brains from youth, when no one can do it.

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