Fig. 5From: Nano-materials enhanced protectants for natural stone surfacesSEM images of blank (a and e), and treated by 101S (b and f), 101S containing 1.5 mg/mL Al2O3 nano-powder (c and g), and 0.5 mg/mL SiO2 nano-powder (d and h) Marble surfaces and profiles, respectivelyBack to article page