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Fecha
2025-11-26
Derechos de acceso
info:eu-repo/semantics/openAccess
Título de la revista
ISSN de la revista
Título del volumen
Editorial
Elsevier
Citas
Resumen
Ultraviolet A (UV-A) radiation from the Sun is a significant risk factor for skin cancer owing to long-term exposition for outdoor workers. The growing need for wearable health monitoring devices demands real-time UV-A sensors with high analytical performance to avoid skin conditions resulting from prolonged UV-A exposure. In this work, we aimed to develop a novel, power-less, low-cost, long-term-stable, and flexible wearable sensor. Such a sensor is based on basic bismuth nitrate (BBN) covered with graphene quantum dots (GQDs) as a photodetector. BBN@GQD photoelectrical material was produced by a very low-cost pyrolytic procedure in gram-scale quantities on a simple hot plate. GQDs improved photoelectrical activity of BBN, yielding good responsivity of 0.25 mA·W−1 (at 0 V bias, incident light intensity 17 μW·cm−2 and 365 nm wavelength). The combination of BBN@GQD and ITO electrodes provided a very sensitive and selective photodetector (a limit of detection of 1.6 ± 0.6 μW·cm−2 light intensity at 0 V bias for 365 nm UV-A wavelength), better than most current UV-A photodetectors. Its high sensitivity at 0 V bias enables its employment as a functional power-free real-time UV-A monitor device. Moreover, the wearable sensor showed acceptable reproducibility (18.9 % relative standard deviation at 12.5 μW·cm−2 light intensity) and long-term stability (up to 1 month of storage). This work proposes a promising wearable device for UV-A monitoring in an outdoor environment, using a new photosensitive material (BBN@GQD), which offers new opportunities in the development of UV photodetectors.
Descripción
The registered version of this article, first published in “Microchemical Journal, 220, 2026, 116363", is available online at the publisher's website: https://doi.org/10.1016/j.microc.2025.116363
La versión registrada de este artículo, publicado por primera vez en “Microchemical Journal, 220, 2026, 116363", está disponible en línea en el sitio web del editor: https://doi.org/10.1016/j.microc.2025.116363
La versión registrada de este artículo, publicado por primera vez en “Microchemical Journal, 220, 2026, 116363", está disponible en línea en el sitio web del editor: https://doi.org/10.1016/j.microc.2025.116363
Categorías UNESCO
Palabras clave
Sensors, Skin health, Electrochemistry, Graphene quantum dots, Bismuth composites, Semiconductors
Citación
Roberto Maria-Hormigos, Olga Monago-Maraña, Antonio Zapardiel Palenzuela, Agustin G. Crevillen. Wearable sensor for solar ultraviolet a radiation monitoring based on a basic bismuth nitrate/graphene quantum dots composite. Microchemical Journal, 220, 2026, 116363
Centro
Facultad de Ciencias
Departamento
Ciencias Analíticas