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Determining the size dependence in the absorption spectra of rutile nanoparticles

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Abstract

This paper discusses the optical absorption spectra of ensembles of titanium dioxide nanocrystals of size 2.0–3.5 nm, obtained by mechanically crushing microcrystalline rutile powder, followed by fractionation of an aqueous suspension of the material and stabilization of the lightest selected fractions in a gelatin matrix. It is established from an analysis of the electron-diffraction patterns that ensembles of rutile nanocrystals are formed. A size effect is found in the spectra of the absorption-efficiency factor of rutile nanocrystals with mean diameters 3.5–2.0 nm, the value of which was 0.2–0.5 eV, respectively.

© 2018 Optical Society of America

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