Abstract
We show that sonochemistry is an efficient and facile route for quantitative coating of γ-Fe2O3 nanoparticles with octadecyltrihydrosilane (OTHS, CH3(CH2)17SiH3). The presence of C-H stretching (2950-2850 cm-1) (1475-1375 cm-1) bands, and the absence of peaks at 2150 and 925 cm-1 (Si-H stretching and bending respectively) confirm the presence of grafted hydrocarbon chains in the irradiated sample, hence the reaction of OTHS with γ-Fe2O3 nanoparticles. The coated nanoparticles show increased magnetization compared to the uncoated ones. X-ray diffraction, magnetization studies, Mössbauer spectra, and electron paramagnetic resonance spectra reveal that the magnetic ordering is more prominent in the OTHS-coated γ-Fe2O3 sample because of improved crystallinity.
Original language | English (US) |
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Pages (from-to) | 1778-1787 |
Number of pages | 10 |
Journal | Chemistry of Materials |
Volume | 14 |
Issue number | 4 |
DOIs | |
State | Published - 2002 |
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Materials Chemistry