Research ArticleBiosensors

Wireless, battery-free, flexible, miniaturized dosimeters monitor exposure to solar radiation and to light for phototherapy

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Science Translational Medicine  05 Dec 2018:
Vol. 10, Issue 470, eaau1643
DOI: 10.1126/scitranslmed.aau1643

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Safer sun exposure

Almost all skin cancers are caused by excessive ultraviolet (UV) irradiation from the sun. Sunscreens can reflect or absorb UV light to protect skin from damage but do not provide a measure of UV exposure. Heo et al. developed flexible, wireless, battery-free dosimeters to monitor light exposure. Body-worn sensors on human participants recorded UVA exposure during recreational outdoor activities, including swimming. Sensors could be fabricated in different shapes and sizes, could capture UVA and UVB exposure for clinical phototherapy, and could measure blue light exposure on infants with jaundice during bilirubin phototherapy. This wireless sensor platform technology enables high precision tracking of instantaneous and cumulative light exposure.