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Bismuth Oxychloride Nanoflakes Enabled High Sensitivity Colorimetric UV Dosimetry
journal contributionposted on 2023-04-03, 17:11 authored by Kyle Troche, Kannan Ramaiyan, Timothy J. Boyle, Fernando H. Garzon
Excessive exposure to sunlight’s ultraviolet (UV) radiation causes adverse effects such as premature aging, sunburn, and skin cancers. Monitoring daily exposure to sunlight is essential to avoid developing health risks. Colorimetric UV sensors change color as a function of UV exposure, provide onsite information about the level of exposure, and can act as a personal wearable device to assist in making informed decisions on sunlight exposure. These sensors utilize radiation-induced reactions on a dye to produce a color change. Here, BiOCl based UV sensor is reported for monitoring UV exposure where a white-to-black color transformation is induced due to the creation of oxygen vacancies in BiOCl. This color transformation is not quantifiable in bulk BiOCl; hence BiOCl was purposely dispersed on filter paper to form petal-like nanostructures that help quantify the color change. Four different dye molecules, 6-carboxyfluorescein, 5-carboxyfluorescein, rhodamine-B, and Prussian blue were evaluated, where 6-carboxyfluorescein gave the best color contrast. The sensor responds to UVA, UVB, and UVC and with proper UV filters can be made selective for specific UV radiations. This unique colorimetric UV sensor can help manage personal UV exposure and reduce the risk of sun exposure ailments.
sensors utilize radiationprovide onsite informationpersonal wearable devicemaking informed decisionsbest color contrastspecific uv radiationsproper uv filterssun exposure ailmentsmonitoring daily exposureblack color transformationmonitoring uv exposurecolor transformationuv exposurecolor changesunlight exposureskin cancerssensor respondspurposely dispersedprussian bluepremature agingoxygen vacanciesmade selectivelike nanostructuresinduced reactionsinduced duehelp quantifyform petalfilter paper