Science: A wearable hair regrowth device [Report]

Although some people embrace the saying "bald is beautiful," others, alopecia or excessive hair loss can cause stress and anxiety. Some studies have shown that stimulating the skin with lasers can help regrow hair, but the equipment is often large, consumes a lot of energy and is difficult to apply in daily life. Now researchers have developed a flexible, portable photostimulator that speeds hair growth in mice. They report their results in ACS Nano,

Affected by millions of men and women worldwide, alopecia has several known causes, including heredity, stress, aging and increased male hormones. Common treatments include medications such as minoxidil, corticosteroid injections and hair transplant surgery. In addition, irradiation of the bald area with a red laser can stimulate the hair follicles, causing the cells to multiply. However, this treatment is often impractical for home use. Therefore, Keon Jae Lee and his colleagues wanted to develop a flexible, long-lasting photostimulator that can be worn on human skin.

The team produced an ultra-thin array of flexible vertical micro light emitting diodes (μLEDs). The arrangement consisted of 900 red .mu. LEDs on a chip that is slightly smaller than a stamp and only 20μm. m was thick. The device used nearly 1,000 times less energy per unit area than a conventional phototherapeutic laser and did not heat enough to cause thermal damage to human skin. The arrangement was sturdy and flexible and held up to 10,000 bending and bending cycles. Researchers tested the device's ability to regrow hair on shaved-back mice. Compared with untreated mice or those receiving minoxidil injections, the mice treated with the & mgr; Leds were treated for 15 minutes a day, significantly faster hair growth, a broader range of growth and longer hair.

More information:
Han Eol Lee et al. Trichogenic photostimulation with monolithic flexible AlGaInP vertical light emitting diodes, ACS Nano (2018). DOI: 10.1021 / acsnano.8b05568

abstract

Alopecia is considered by modern people to be an aesthetic, psychological and social problem. Although laser-induced skin stimulation is used for depilatory treatment, such treatment has significant disadvantages of high energy consumption, large equipment size and limited use in daily life. Here we present a portable photostimulator for hair growth applications with powerful flexible red vertical light emitting diodes (f-VLEDs). Flexible micro-scale LEDs were effectively fabricated through a simple monolithic manufacturing process, resulting in high light output (~ 30 mW mm-2), low forward voltage (~ 2.8V), and excellent flexibility for portable biostimulation. Finally, trichogenous stimulation of a hairless mouse was achieved using high performance red f-VLEDs with high thermal stability, uniformity and mechanical durability.

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Although some people embrace the saying "bald is beautiful," others, alopecia or excessive hair loss can cause stress and anxiety. Some studies have shown that stimulating the skin with lasers can help regrow hair, but the equipment is often large, consumes a lot of energy and is difficult to apply in daily life. Now researchers have developed a flexible, portable photostimulator that speeds hair growth in mice. They report their results in ACS Nano,

Affected by millions of men and women worldwide, alopecia has several known causes, including heredity, stress, aging and increased male hormones. Common treatments include medications such as minoxidil, corticosteroid injections and hair transplant surgery. In addition, irradiation of the bald area with a red laser can stimulate the hair follicles, causing the cells to multiply. However, this treatment is often impractical for home use. Therefore, Keon Jae Lee and his colleagues wanted to develop a flexible, long-lasting photostimulator that can be worn on human skin.

The team produced an ultra-thin array of flexible vertical micro light emitting diodes (μLEDs). The arrangement consisted of 900 red .mu. LEDs on a chip that is slightly smaller than a stamp and only 20μm. m was thick. The device used nearly 1,000 times less energy per unit area than a conventional phototherapeutic laser and did not heat enough to cause thermal damage to human skin. The arrangement was sturdy and flexible and held up to 10,000 bending and bending cycles. Researchers tested the device's ability to regrow hair on shaved-back mice. Compared with untreated mice or those receiving minoxidil injections, the mice treated with the & mgr; Leds were treated for 15 minutes a day, significantly faster hair growth, a broader range of growth and longer hair.

More information:
Han Eol Lee et al. Trichogenic photostimulation with monolithic flexible AlGaInP vertical light emitting diodes, ACS Nano (2018). DOI: 10.1021 / acsnano.8b05568

abstract

Alopecia is considered by modern people to be an aesthetic, psychological and social problem. Although laser-induced skin stimulation is used for depilatory treatment, such treatment has significant disadvantages of high energy consumption, large equipment size and limited use in daily life. Here we present a portable photostimulator for hair growth applications with powerful flexible red vertical light emitting diodes (f-VLEDs). Flexible micro-scale LEDs were effectively fabricated through a simple monolithic manufacturing process, resulting in high light output (~ 30 mW mm-2), low forward voltage (~ 2.8V), and excellent flexibility for portable biostimulation. Finally, trichogenous stimulation of a hairless mouse was achieved using high performance red f-VLEDs with high thermal stability, uniformity and mechanical durability.

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