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Title: Sonochemical synthesis of iron colloids

Abstract

We present here a new method for the preparation of stable ferromagnetic colloids of iron using high-intensity ultrasound to sonochemically decompose volatile organometallic compounds. These colloids have narrow size distributions centered at a few nanometers and are found to be superparamagnetic. In conclusion, a simple synthetic method has been discovered to produce nanosized iron colloid using high-intensity ultrasound. Nanometer iron particles dispersed in polyvinylpyrrolidone (PVP) matrix or stabilized by adsorption of oleic acid have been synthesized by sonochemical decomposition of Fe(CO){sub 5}. Transmission electron micrographs show that the iron particles have a relatively narrow range in size from 3 to 8 nm for polyvinylpyrrolidone, while oleic acid gives an even more uniform distribution at 8 nm. magnetic measurements revealed that these nanometer iron particles are superparamagnetic with a saturation magnetization of 101 emu/g (Fe) at 290 K. This work is easily extended to colloids of other metals and to alloys of two or more metals, simply by using multiple volatile precursors. 29 refs., 4 figs.

Authors:
; ;  [1]
  1. Univ. of Illinois, Urbana, IL (United States)
Publication Date:
OSTI Identifier:
437395
Resource Type:
Journal Article
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 118; Journal Issue: 47; Other Information: PBD: 27 Nov 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 40 CHEMISTRY; 66 PHYSICS; COLLOIDS; SYNTHESIS; STABILITY; PARTICULATES; TRANSMISSION ELECTRON MICROSCOPY; CRYSTALLIZATION; IRON; ULTRASONIC WAVES; IRON COMPOUNDS; OLEIC ACID; ELECTRON DIFFRACTION; MAGNETIC PROPERTIES

Citation Formats

Suslick, K S, Fang, M, and Hyeon, T. Sonochemical synthesis of iron colloids. United States: N. p., 1996. Web. doi:10.1021/ja961807n.
Suslick, K S, Fang, M, & Hyeon, T. Sonochemical synthesis of iron colloids. United States. https://doi.org/10.1021/ja961807n
Suslick, K S, Fang, M, and Hyeon, T. 1996. "Sonochemical synthesis of iron colloids". United States. https://doi.org/10.1021/ja961807n.
@article{osti_437395,
title = {Sonochemical synthesis of iron colloids},
author = {Suslick, K S and Fang, M and Hyeon, T},
abstractNote = {We present here a new method for the preparation of stable ferromagnetic colloids of iron using high-intensity ultrasound to sonochemically decompose volatile organometallic compounds. These colloids have narrow size distributions centered at a few nanometers and are found to be superparamagnetic. In conclusion, a simple synthetic method has been discovered to produce nanosized iron colloid using high-intensity ultrasound. Nanometer iron particles dispersed in polyvinylpyrrolidone (PVP) matrix or stabilized by adsorption of oleic acid have been synthesized by sonochemical decomposition of Fe(CO){sub 5}. Transmission electron micrographs show that the iron particles have a relatively narrow range in size from 3 to 8 nm for polyvinylpyrrolidone, while oleic acid gives an even more uniform distribution at 8 nm. magnetic measurements revealed that these nanometer iron particles are superparamagnetic with a saturation magnetization of 101 emu/g (Fe) at 290 K. This work is easily extended to colloids of other metals and to alloys of two or more metals, simply by using multiple volatile precursors. 29 refs., 4 figs.},
doi = {10.1021/ja961807n},
url = {https://www.osti.gov/biblio/437395}, journal = {Journal of the American Chemical Society},
number = 47,
volume = 118,
place = {United States},
year = {1996},
month = {11}
}