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

被引：39

作者：

Khalil, H

Mahajan, D ^{[1
]}

Rafailovich, M

Gelfer, M

Pandya, K

机构：

[1] Brookhaven Natl Lab, Energy Sci & Technol Dept, Upton, NY 11973 USA

[2] SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA

[3] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

[4] SFA, Adv Technol Div, Largo, MD 20774 USA

来源：

LANGMUIR | 2004年 / 20卷 / 16期

关键词：

D O I：

10.1021/la0497402

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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. Mossbauer 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 degreesC. 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.

引用

页码：6896 / 6903

页数：8

共 46 条

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