1. A Wearable Colorimetric Dosimeter to Monitor Sunlight Exposure
- Author
-
Haowen Ren, Anamik Jhunjhunwala, Yanqi Luo, Junxin Wang, Ananthakrishnan Soundaram Jeevarathinam, Eric E. Fullerton, Jeanne E. Lemaster, David P. Fenning, and Jesse V. Jokerst
- Subjects
Color transition ,Materials science ,02 engineering and technology ,010402 general chemistry ,medicine.disease_cause ,colorimetric sensors ,01 natural sciences ,Article ,Industrial and Manufacturing Engineering ,medicine ,Climate-Related Exposures and Conditions ,General Materials Science ,UV dosimeters ,wristbands ,Sunlight ,Dosimeter ,business.industry ,wearable sensors ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Mechanics of Materials ,Optoelectronics ,Solar simulator ,0210 nano-technology ,business ,Ultraviolet ,Visible spectrum - Abstract
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.
- Published
- 2018