Fig. 2From: Dentin bonding performance of experimental one-step adhesives after incorporation of POOH–SiO2 nanoparticlesFTIR spectra of SiO2 and SiO2–POOH. *The SiO2 sample was used as background prior the SiO2 − POOH analysis to avoid peaks’ overlapping between 500 and 1500 cm−1 Back to article page