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30 Aug, 2021
các nhà khoa học phát minh ra kính áp tròng mà người đeo nó có thể bắn tia laser...
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Researchers have developed an ultrathin and flexible membrane (màng), less than a thousandth of a millimeter thick, that can be placed onto a contact lens, enabling the wearer to essentially shoot lasers from their eyes.
The membrane, which was developed by scientists from the University of St Andrews in Scotland, is made from an organic semiconducting polymer—a broad class of materials that consist of many repeated chains (chuỗi) of molecular (phân tử) units. It emits (phát ra) very low-powered laser light when illuminated (chiếu sáng, rọi sáng) by another laser.
Each membrane is able to produce a unique "barcode"—a well-defined series of laser beams in the form of sharp lines. This could have applications in identification technology as a kind of wearable security tag,
The membrane could also be applied to other objects, such as polymer banknotes (tiền giấy), in which it could act as an authentication (xác nhận là đúng, chứng minh là xác thực) feature to protect against counterfeiting (làm giả). It even has the potential to be used as a sensor (thiết bị cảm biến) to detect explosives (chất nổ)...
Bài trước: Lý do thuyết phục
Tags: science
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