Development of a Heterostructure Working as Biosensor Utilizing an Erbium-Phthalocyanine Colloid for Potential Glucose Detection in Saliva

This study presents a novel biosensor for non-invasive glucose detection in saliva, using sol colloids with erbium phthalocyanine and polyvinyl acetate particles. Erbium phthalocyanine, a green, fluorescent pigment synthesized with a solar reactor, was characterized using various techniques, confirming its successful preparation. Thin films of erbium phthalocyanine in polyvinyl acetate colloids were deposited on glass substrates to manufacture the sensors. These films were characterized by ultraviolet-visible spectroscopy, revealing distinctive absorption bands. The biosensors effectively detected glucose in saliva from individuals with different health conditions. The study demonstrates the potential of these biosensors as practical and non-invasive tools for glucose monitoring, contributing to non-invasive diabetes monitoring technologies. The findings suggest that organic semiconductors, particularly erbium phthalocyanine, are significant in biosensor development, promising improved early detection and management of diabetes.