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A Wearable Colorimetric Dosimeter to Monitor Sunlight Exposure
Author(s) -
Wang Junxin,
Jeevarathinam Ananthakrishnan Soundaram,
Jhunjhunwala Anamik,
Ren Haowen,
Lemaster Jeanne,
Luo Yanqi,
Fenning David P.,
Fullerton Eric E.,
Jokerst Jesse V.
Publication year - 2018
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.201800037
Subject(s) - dosimeter , ultraviolet , materials science , sunlight , uv filter , optoelectronics , optics , radiation , physics
The personal ultraviolet (UV) dosimeter is a useful measurement tool to prevent UV induced dermal damages; however, conventional digital dosimeters are either bulky or require external power sources. Here, a wearable, colorimetric UV film dosimeter that provides color transition, from purple to transparent, is reported to indicate the UV dose. The film dosimeter is made of a purple photodegradable dye ((2Z,6Z)‐2,6‐bis(2‐(2,6‐diphenyl‐4H‐thiopyran‐4‐ylidene)ethylidene)cyclohexanone or DTEC) blended in low density polyethylene film. The DTEC film discolored 3.3 times more under the exposure of UV light (302 nm) than visible light (543 nm), and a UV bandpass filter is developed to increase this selectivity to UV light. The DTEC film completely discolors to transparency in 2 h under an AM 1.5 solar simulator, suggesting the potential as an indicator for individuals with types I–VI skin to predict interventions to avoid sunburn. Finally, the DTEC film is integrated with the UV bandpass filter on a wristband to function as a wearable dosimeter for low cost and convenient monitoring of sunlight exposure.