Oxygen indicator films of acrylate photopolymers and TiO2 nanoparticles with tunable response times
Source abstract
Abstract
An easy and fast fabrication strategy to obtain Photochromic Films (PFs) for naked-eye detection of oxygen is presented. These PFs are based on the photoreductive activity of TiO2 nanoparticles combined with the redox-driven color switching property of methylene blue, embedded in a photocurable and tunable air-permeable polyethylene glycol diacrylate (PEGDA) matrix. The PF is fabricated by a single-step process: the UVA light exposure initiates the polymerization and simultaneously reduces the blue-color dye in its colorless form. The resulting PF exhibits fast discoloration and modulable recoloration time in the air. The tunability of PFs color-switching can be used for engineering colorimetric sensors with preset oxygen responsive ranges to fulfill specific application requirements.
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Research context
OpenAlex topics: Analytical Chemistry and Sensors · Photochromic and Fluorescence Chemistry · Advanced Chemical Sensor Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Materias Srl
Università degli Studi di Napoli Federico II
National Research Council
University of Campania “Luigi Vanvitelli”
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