Diffusion doping of cobalt in rod-shape anatase TiO₂ nanocrystals leads to antiferromagnetism.

ABSTRACT: Cobalt(ii) ions were adsorbed to the surface of rod-shape anatase TiO₂ nanocrystals and subsequently heated to promote ion diffusion into the nanocrystal. After removal of any remaining surface bound cobalt, a sample consisting of strictly cobalt-doped TiO₂ was obtained and characterized with powder X-ray diffraction, transmission electron microscopy, UV-visible spectroscopy, fluorescence spectroscopy, X-ray photoelectron spectroscopy, SQUID magnetometry, and inductively-coupled plasma atomic emission spectroscopy. The nanocrystal morphology was unchanged in the process and no new crystal phases were detected. The concentration of cobalt in the doped samples linearly correlates with the initial loading of cobalt(ii) ions on the nanocrystal surface. Thin films of the c

SUBMITTER: Mia S 

PROVIDER: S-EPMC9417846 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature