Fig. 17. Morphology of the composite obtained by photopolymerization of a photocurable composition containing: 0.5 wt% of MWCNTs (NC7000™) in BisGMA/TEGDMA monomer mixture (50%/50% w/w), at room temperature in air. The photopolymerization was initiated with a two-component initiating system composed of BI-PH-O-CH₃ (0.1% wt) and iodonium salt (1% wt) and a high-power 365 nm UV light (SOLIS-365C) was used. The UV light intensity at the sample surface was 280 mW cm⁻² at room temperature and under atmospheric conditions, the irradiation time was 360 s. (A) The sample seen in 365 nm UV light; (B) the sample seen in daylight; (C) a bright-field microscopy image of the sample illumination by white light; (D) a bright-field microscopy image of the sample illuminated with 365 nm UV-LED light; (E) merge of (C) and (D) images for better visualisation of the MWCNT agglomerates.