A thin film device which turns an appropriate shade of pink to alert wearers of sunburn has been developed by University of Strathclyde researchers.
The work could be worn as a wrist band to warn wearers they risk receiving a potentially harmful dose of ultraviolet rays.A chemical reaction in the indicator is triggered by UV rays, releasing an acid into a dye, and causing it to change colour, reports the journal Chemical Communications.
Professor of chemistry, Andrew Mills, who led the team, describes this combination of a UV-driven reaction with an acid-sensitive dye as "intelligent ink".
"People think of chemical reactions as happening in test tubes. But here you have a reaction in a very thin layer of ink film that produces a colour change," The BBC quoted him, as saying.
Professor Mills said that the highlight of the device is - it can be adjusted to give an instant signal at the point when sun exposure is about to cause damage.
Professor Mills has made a prototype of the film, combining a dye that gradually changes colour from yellow to blue, and a central strip of dye that turns pink.
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Source-ANI
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