Fe2O3/TiO2 nanoparticles-a complex structural study

0438033 - ÚFM 2015 RIV CH eng J - Journal Article
Valeš, V. - Buljan, M. - Janicki, V. - Bernstorff, S. - Mangold, S. - Siketić, Z. - Schneeweiss, Oldřich - Holý, V.
Fe2O3/TiO2 nanoparticles-a complex structural study.
Thin Solid Films. Roč. 564, AUG (2014), s. 65-72. ISSN 0040-6090. E-ISSN 1879-2731
Institutional support: RVO:68081723
Keywords : Ferric oxide * Titanium oxide * Nanoparticles * Multilayer * Particle arrangement * X-ray absorption spectroscopy
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.759, year: 2014

We report on the structure and arrangement of particles created in the Fe2O3/TiO2 + SiO2 multilayers. X-ray diffraction and extended X-ray absorption fine structure spectroscopy reveal the presence of crystalline rutile-TiO2 while the iron oxide remains either amorphous or forms very small clusters of Fe2O3. The Fe3+ oxidation state of iron atoms has been confirmed by Mossbauer and X-ray spectroscopy. The degree of the particle ordering has been studied by grazing-incidence small-angle X-ray scattering. It was demonstrated that with increasing temperature partially ordered nanoparticles are created and grow up to a critical temperature when the ordering is destroyed. Both particle sizes and inter-particle distances depend strongly on the thickness of the Ti/Fe containing layer. (C) 2014 Elsevier B.V. All rights reserved.
Permanent Link: http://hdl.handle.net/11104/0241549