A wearable device for regrowing hair


Affecting millions of group and women worldwide, alopecia has several famous causes, including heredity, stress, aging and towering masculine hormones. Common treatments embody medications, such as minoxidil, corticosteroid injections and hair transplant surgery. In addition, irradiating a bald area with a red laser can kindle hair follicles, causing cells to proliferate. However, this diagnosis is mostly unreal for home use. So, Keon Jae Lee and colleagues wanted to rise a flexible, durable photostimulator that could be ragged on tellurian skin.

The group built an ultrathin array of stretchable straight micro-light-emitting diodes (μLEDs). The array consisted of 900 red μLEDs on a chip somewhat smaller than a postage stamp and usually 20 μm thick. The device used roughly 1,000 times reduction energy per section area than a required phototherapeutic laser, and it did not feverishness adult adequate to means thermal repairs to tellurian skin. The array was stout and flexible, fast adult to 10,000 cycles of tortuous and unbending. The researchers tested a device’s ability to regrow hair on mice with shaved backs. Compared with untreated mice or those receiving minoxidil injections, a mice treated with a μLED patch for 15 mins a day for 20 days showed significantly faster hair growth, a wider regrowth area and longer hairs.


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