Groundbreaking technology by scientists presents a UV detection optical fiber that is pliable and can be used multiple times, indicating improved compatibility with intelligent gadgets and progress in UV monitoring systems.
The classic saying “the amount determines the toxicity” is relevant to ultraviolet (UV) light as well. While UV light is vital for synthesizing vitamin D, exhibits positive outcomes in phototherapy, and contributes to various industrial procedures and plant development, it also leads to adverse effects like premature skin aging and cancer.
The positive or negative impacts of UV light rely, among other factors, on the quantity of UV radiation received. As point-of-care solutions and the Internet of Things advance, there is a rising need for real-time observation of environmental factors affecting our well-being. Nevertheless, the current UV optical detection systems depend on materials with restricted flexibility or on expensive and delicate scientific-grade equipment.
Revolutionary UV Sensing Mechanism
To tackle this challenge, a team of scientists led by Prof. Bora Ung at École de Technologie Supérieure (ÉTS) in Canada fabricated a novel elastic optical fiber for detecting UV light. They utilized poly(dimethylsiloxane) (PDMS), a highly adaptable, stretchable, and biocompatible polymer, infused with an organic dye that serves as a molecular switch to make PDMS responsive to UV light.
The molecular configuration of the organic dye, called spiropyran, undergoes a reversible alteration triggered by UV exposure, resulting in variations in the optical characteristics of the PDMS material. These alterations can be gauged using readily available LED/laser sources and photodiodes. Once the UV radiation ceases, the material reverts to its original properties, akin to a switch, and can be utilized repeatedly.
The researchers envision its potential integration into smart fabrics and wearable devices for continuous monitoring of UV exposure doses, leveraging the perks of optical sensors, such as immunity to electromagnetic disturbances and corrosion. These findings mark a significant advancement in the domain of flexible optics, sophisticated optical components, and polymer-based optical waveguide sensors.
Citation: “Innovative elastomeric spiropyran-infused poly(dimethylsiloxane) optical waveguide for UV sensing” authored by Camila Aparecida Zimmermann, Koffi Novignon Amouzou, Dipankar Sengupta, Aashutosh Kumar, Nicole Raymonde Demarquette, and Bora Ung, published on 15th July 2024 in Frontiers of Optoelectronics.
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