Magnetic enhancement of γ-Fe2O3 nanoparticles by sonochemical coating

Kurikka V.P.M. Shafi; Abraham Ulman; Ansil Dyal; Xingzhong Yan; Nan Loh Yang; Claude Estournès; Léopold Fournès; Alain Wattiaux; Henry White; Miriam Rafailovich

doi:10.1021/cm011535+

Magnetic enhancement of γ-Fe₂O₃ nanoparticles by sonochemical coating

Kurikka V.P.M. Shafi, Abraham Ulman, Ansil Dyal, Xingzhong Yan, Nan Loh Yang, Claude Estournès, Léopold Fournès, Alain Wattiaux, Henry White, Miriam Rafailovich

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

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)
Pages (from-to)	1778-1787
Number of pages	10
Journal	Chemistry of Materials
Volume	14
Issue number	4
DOIs	https://doi.org/10.1021/cm011535+
State	Published - 2002

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

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title = "Magnetic enhancement of γ-Fe2O3 nanoparticles by sonochemical coating",

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, M{\"o}ssbauer 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.",

author = "Shafi, {Kurikka V.P.M.} and Abraham Ulman and Ansil Dyal and Xingzhong Yan and Yang, {Nan Loh} and Claude Estourn{\`e}s and L{\'e}opold Fourn{\`e}s and Alain Wattiaux and Henry White and Miriam Rafailovich",

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doi = "10.1021/cm011535+",

language = "English (US)",

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pages = "1778--1787",

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TY - JOUR

T1 - Magnetic enhancement of γ-Fe2O3 nanoparticles by sonochemical coating

AU - Shafi, Kurikka V.P.M.

AU - Ulman, Abraham

AU - Dyal, Ansil

AU - Yan, Xingzhong

AU - Yang, Nan Loh

AU - Estournès, Claude

AU - Fournès, Léopold

AU - Wattiaux, Alain

AU - White, Henry

AU - Rafailovich, Miriam

PY - 2002

Y1 - 2002

N2 - 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.

AB - 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.

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JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 4

ER -

Magnetic enhancement of γ-Fe₂O₃ nanoparticles by sonochemical coating

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