A Versatile Light‐Triggered Radical‐Releasing Surface Coating Technology

Abstract

Organic based redox active materials and coatings are increasingly being investigated as solutions for more efficient energy devices, catalysts, sensors, and biomedical technologies. Their advantage is negating the necessity for expensive and unsustainable rare earth metals seen in other redox active materials. Challenges to their wide‐spread usage remain, including versatility of coatings on a wide range of substrates, and creating smart devices that can respond to environmental stimuli. A new light responsive radical releasing redox coating has been developed, that can be rapidly and stably applied to a diverse range of substrates including silicon dioxide, plastics, and microparticles. These coatings rapidly cleave upon irradiation with UV‐A light to release stable nitroxides from the surface coating. These coatings are developed into microparticle sensors for radical oxygen species, which are able to detect the generation of free radicals in a model system for particulate matter pollution. These new responsive organic redox coatings also offer future potential to function as switchable organic electrodes, and biomedical surface coatings to prevent biofouling and reduce inflammation.

Application study of curcumin fluorescent complex coated with pharmaceutical excipients for cell imaging

“…Not only that, but coating technology can also reduce the damaging effects of drugs on the body during treatment. Therefore, coating technology is also often applied to various formulations such as tablets, liquid formulations and the like ( Katona et al, 2016 ; Desai et al, 2018 ; Boase et al, 2022 ; Jing et al, 2022 ; Shao et al, 2022 ; Xiao et al, 2022 ).…”

Magnetically Cured Macroradical Epoxy as Antimicrobial Coating

“…Consequently, other researchers associated the metabolic pathway of nitroxides leading to a disruption in the growth of biofilm to be of the exact mechanism when cells metabolized nitric oxide. New coatings that leach stable radicals from the surface upon irradiation by UV‐A light have been reported [16] . Primarily developed into microparticle sensors to detect ROS present in particulate matter pollution, these organic redox coatings have the potential to prevent biofouling, can be applied on biomedical surfaces to reduce inflammation, and are also envisaged to function as switchable organic electrodes.…”