Optimization of Plasmonic Gold Nanoparticle Concentration in Green LED Light Active Dental Photopolymer

Gold nanoparticles (AuNPs) display surface plasmon resonance (SPR) as a result of their irradiation at targeted light frequency. SPR also results in heat production that increases the temperature surrounding environment, affecting polymerization. The aim was to investigate effect AuNPs on dimethacrylate-based photopolymer system. tested composites were designed overlap illumination required for polymerization and effect. 5 nm-sized dodecanethiol capped applied different concentrations matrix irradiated with green (? = 532 nm), where Irgacure 784 photoinitiator absorbs light. plasmonic investigated refractive index change by imaging (SPRi) supplemented ellipsometry. Moreover, optical transmission electron micrographs (TEM), diametral tensile stress (DTS), confocal Raman spectroscopy performed determine degree conversion (DC) 1.0, 1.4, 2.0 mW/cm2 intensities. It found optimal conditions 0.0208 wt% concentration 1.4 intensity which change, DTS, DC data all maximal. study confirmed are applicable improve efficiency dental composite resin.