Nano Archive

Ion irradiation induced reduction of Fe3+ to Fe2+ and Fe0 in triethoxysilane films

Wilks, R G and Kurmaev, E Z and Pivin, J C and Hunt, A and Yablonskikh, M V and Zatsepin, D A and Moewes, A and Shin, S and Palade, P and Principi, G (2005) Ion irradiation induced reduction of Fe3+ to Fe2+ and Fe0 in triethoxysilane films. Journal of Physics: Condensed Matter, 17 (43). pp. 7023-7028.

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Official URL: http://stacks.iop.org/0953-8984/17/7023

Abstract

Silica gel films prepared from mixtures of triethoxysilane (TH) and Fe nitrate Fe(NO)3*9H2O were irradiated with various fluences of 3 MeV Au ions. Silicon 2p x-ray absorption (XAS) and L2,3 x-ray emission spectra of irradiated TH:Fe films are found to be very similar to those of SiO2, providing direct evidence of the formation of a glassy matrix. Fe L2,3 XAS shows the reduction of Fe3+ ions at low fluence, initially attributed to the formation of Fe metallic nanoparticles. Mossbauer spectra of films irradiated with higher ion fluences are well fitted by a singlet associated with superparamagnetic Fe particles and a doublet associated with Fe2+ ions in Fe-Si-O complexes.

Item Type:Article
ID Code:5436
Deposited By:Prof. Alexey Ivanov
Deposited On:06 Feb 2010 11:11
Last Modified:06 Feb 2010 11:53

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