Synthesis of zerovalent nanophase metal particles stabilized with poly(ethylene glycol)

Hanaa Khalil; Devinder Mahajan; Miriam Rafailovich; Mikhail Gelfer; Kaumudi Pandya

doi:10.1021/la0497402

Synthesis of zerovalent nanophase metal particles stabilized with poly(ethylene glycol)

Hanaa Khalil
, Devinder Mahajan
, Miriam Rafailovich
, Mikhail Gelfer
, Kaumudi Pandya

Materials Science and Engineering

Brookhaven National Laboratory
Stony Brook University
Sachs/Freeman Associates

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

49 Scopus citations

Abstract

Concurrent sonolysis of iron pentacarbonyl and poly(ethylene glycol)-400 (PEG-400) in hexadecane solvent proceeds via zero-order kinetics and results in Fe nanoparticles encapsulated in PEG-400 (Fe-PEG). The transmission electron microscopy images show Fe-PEG consisting of <3 nm Fe particles that are evenly dispersed in the PEG matrix. Mössbauer and X-ray absorption fine structure/X-ray absorption near-edge structure data reveal an ordered PEG assembly that helps protect the zerovalent Fe core. The Fe nanoparticles in Fe-PEG are superparamagnetic with a magnetization value of 45 emu/g-Fe at 10 KOe. The rheology of the synthesized material shows an unusual increase in viscosity with temperature that is likely due to lower critical saturation temperature phase segregation over 40°C. The low-temperature mobility of the PEG-400 moiety in Fe-PEG would allow facile ligation of the Fe ⁰ core with biologically and chemically active groups.

Original language	English
Pages (from-to)	6896-6903
Number of pages	8
Journal	Langmuir
Volume	20
Issue number	16
DOIs	https://doi.org/10.1021/la0497402
State	Published - Aug 3 2004

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10.1021/la0497402

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title = "Synthesis of zerovalent nanophase metal particles stabilized with poly(ethylene glycol)",

abstract = "Concurrent sonolysis of iron pentacarbonyl and poly(ethylene glycol)-400 (PEG-400) in hexadecane solvent proceeds via zero-order kinetics and results in Fe nanoparticles encapsulated in PEG-400 (Fe-PEG). The transmission electron microscopy images show Fe-PEG consisting of <3 nm Fe particles that are evenly dispersed in the PEG matrix. M{\"o}ssbauer and X-ray absorption fine structure/X-ray absorption near-edge structure data reveal an ordered PEG assembly that helps protect the zerovalent Fe core. The Fe nanoparticles in Fe-PEG are superparamagnetic with a magnetization value of 45 emu/g-Fe at 10 KOe. The rheology of the synthesized material shows an unusual increase in viscosity with temperature that is likely due to lower critical saturation temperature phase segregation over 40°C. The low-temperature mobility of the PEG-400 moiety in Fe-PEG would allow facile ligation of the Fe 0 core with biologically and chemically active groups.",

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T1 - Synthesis of zerovalent nanophase metal particles stabilized with poly(ethylene glycol)

AU - Khalil, Hanaa

AU - Mahajan, Devinder

AU - Rafailovich, Miriam

AU - Gelfer, Mikhail

AU - Pandya, Kaumudi

PY - 2004/8/3

Y1 - 2004/8/3

N2 - Concurrent sonolysis of iron pentacarbonyl and poly(ethylene glycol)-400 (PEG-400) in hexadecane solvent proceeds via zero-order kinetics and results in Fe nanoparticles encapsulated in PEG-400 (Fe-PEG). The transmission electron microscopy images show Fe-PEG consisting of <3 nm Fe particles that are evenly dispersed in the PEG matrix. Mössbauer and X-ray absorption fine structure/X-ray absorption near-edge structure data reveal an ordered PEG assembly that helps protect the zerovalent Fe core. The Fe nanoparticles in Fe-PEG are superparamagnetic with a magnetization value of 45 emu/g-Fe at 10 KOe. The rheology of the synthesized material shows an unusual increase in viscosity with temperature that is likely due to lower critical saturation temperature phase segregation over 40°C. The low-temperature mobility of the PEG-400 moiety in Fe-PEG would allow facile ligation of the Fe 0 core with biologically and chemically active groups.

AB - Concurrent sonolysis of iron pentacarbonyl and poly(ethylene glycol)-400 (PEG-400) in hexadecane solvent proceeds via zero-order kinetics and results in Fe nanoparticles encapsulated in PEG-400 (Fe-PEG). The transmission electron microscopy images show Fe-PEG consisting of <3 nm Fe particles that are evenly dispersed in the PEG matrix. Mössbauer and X-ray absorption fine structure/X-ray absorption near-edge structure data reveal an ordered PEG assembly that helps protect the zerovalent Fe core. The Fe nanoparticles in Fe-PEG are superparamagnetic with a magnetization value of 45 emu/g-Fe at 10 KOe. The rheology of the synthesized material shows an unusual increase in viscosity with temperature that is likely due to lower critical saturation temperature phase segregation over 40°C. The low-temperature mobility of the PEG-400 moiety in Fe-PEG would allow facile ligation of the Fe 0 core with biologically and chemically active groups.

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ER -

Synthesis of zerovalent nanophase metal particles stabilized with poly(ethylene glycol)

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