Photographs of
obtained yellow NiTiO3 nanoparticles were taken using a Canon digital IXUS 70 camera.
The optical properties of the NiTiO3 nanoparticles were studied using a UV-Vis-NIR
spectrophotometer (Varian, Cary 5000) with integrating sphere. The reflection spectra were
scanned in the range of 250-2500 nm with a 1-nm interval.