Published November 2, 2005 | Version v1
Journal article Metadata-only

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

Creators

  • 1. Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon, SK, S7N 5E2 (Canada)
  • 2. Institute of Metal Physics, Russian Academy of Sciences-Ural Division, 620219 Yekaterinburg GSP-170 (Russian Federation)
  • 3. Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, Batiment 108, F-91405 Orsay Campus (France)
  • 4. Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8581 (Japan)
  • 5. Dipartimento di Ingegneria Meccanica, Settore Materiali, Universita di Padova, Via Marzolo 9, 35131 Padova (Italy)

Description

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. Moessbauer 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

Availability note (English)

Available online at http://stacks.iop.org/0953-8984/17/7023/cm5_43_019.pdf or at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/

Additional details

Identifiers

URL
http://stacks.iop.org/0953-8984/17/7023/cm5_43_019.pdf;
DOI
10.1088/0953-8984/17/43/019;
PII
S0953-8984(05)06105-9;

Publishing Information

Journal Title
Journal of Physics. Condensed Matter
Journal Volume
17
Journal Issue
43
Journal Page Range
p. 7023-7028
ISSN
0953-8984
CODEN
JCOMEL

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
37059469
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ABSORPTION; ABSORPTION SPECTROSCOPY; EMISSION SPECTRA; FILMS; GOLD IONS; ION BEAMS; IRON IONS; IRRADIATION; MEV RANGE; MIXTURES; MOESSBAUER EFFECT; NANOSTRUCTURES; NITRATES; NITRIC OXIDE; OXYGEN COMPLEXES; PARTICLES; PHYSICAL RADIATION EFFECTS; REDUCTION; SILANES; SILICA; SILICA GEL; SILICON; SILICON OXIDES; SUPERPARAMAGNETISM; X RADIATION; X-RAY SPECTRA; X-RAY SPECTROSCOPY
Descriptors DEC
ADSORBENTS; BEAMS; CHALCOGENIDES; CHARGED PARTICLES; CHEMICAL REACTIONS; COMPLEXES; DISPERSIONS; ELECTROMAGNETIC RADIATION; ELEMENTS; ENERGY RANGE; HYDRIDES; HYDROGEN COMPOUNDS; IONIZING RADIATIONS; IONS; MAGNETISM; MINERALS; NITROGEN COMPOUNDS; NITROGEN OXIDES; ORGANIC COMPOUNDS; ORGANIC SILICON COMPOUNDS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; RADIATION EFFECTS; RADIATIONS; SEMIMETALS; SILICON COMPOUNDS; SORPTION; SPECTRA; SPECTROSCOPY