The Sonochemical Preparation of Air-stable Cobalt Nanoparticles

Qiaoling Li; Hongzhen Duan; Yuri Koltypin; Aharon Gedanken

The Sonochemical Preparation of Air-stable Cobalt Nanoparticles

Qiaoling Li, Hongzhen Duan, Yuri Koltypin, Aharon Gedanken

Department of Chemistry

North University of China

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Nanoparticles of the cobalt have been prepared by sonolysis of a Co(NO)(CO)₃ in diphenylmethane solution under argon. The as-prepared product is an amorphous material having 10 nm diameter particles. Upon annealing in argon at 450 ⁰C/5h, an air-stable cobalt nanocrystalline is formed with an increased particle size to ∼ 30 nm. The cobalt nanoparticles have been characterized by XRD, TEM, TGA, DSC, XPS, and magnetic susceptibility measurements. The nanocrystalline particles have a core-shell structure in which the cobalt core is surrounded by a carbon surface layer. These cobalt nanoparticles show an excellent magnetic performance and storage stability. The stability of the nanocrystalline particle has been discussed, based on the core-shell structure.

Original language	English
Title of host publication	Proceedings of the International Symposium on Test and Measurement
Pages	4367-4372
Number of pages	6
State	Published - 2003

Publication series

Name	Proceedings of the International Symposium on Test and Measurement
Volume	5

Cite this

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title = "The Sonochemical Preparation of Air-stable Cobalt Nanoparticles",

abstract = "Nanoparticles of the cobalt have been prepared by sonolysis of a Co(NO)(CO)3 in diphenylmethane solution under argon. The as-prepared product is an amorphous material having 10 nm diameter particles. Upon annealing in argon at 450 0C/5h, an air-stable cobalt nanocrystalline is formed with an increased particle size to ∼ 30 nm. The cobalt nanoparticles have been characterized by XRD, TEM, TGA, DSC, XPS, and magnetic susceptibility measurements. The nanocrystalline particles have a core-shell structure in which the cobalt core is surrounded by a carbon surface layer. These cobalt nanoparticles show an excellent magnetic performance and storage stability. The stability of the nanocrystalline particle has been discussed, based on the core-shell structure.",

author = "Qiaoling Li and Hongzhen Duan and Yuri Koltypin and Aharon Gedanken",

year = "2003",

language = "אנגלית",

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The Sonochemical Preparation of Air-stable Cobalt Nanoparticles. / Li, Qiaoling; Duan, Hongzhen; Koltypin, Yuri et al.
Proceedings of the International Symposium on Test and Measurement. 2003. p. 4367-4372 (Proceedings of the International Symposium on Test and Measurement; Vol. 5).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Koltypin, Yuri

AU - Gedanken, Aharon

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N2 - Nanoparticles of the cobalt have been prepared by sonolysis of a Co(NO)(CO)3 in diphenylmethane solution under argon. The as-prepared product is an amorphous material having 10 nm diameter particles. Upon annealing in argon at 450 0C/5h, an air-stable cobalt nanocrystalline is formed with an increased particle size to ∼ 30 nm. The cobalt nanoparticles have been characterized by XRD, TEM, TGA, DSC, XPS, and magnetic susceptibility measurements. The nanocrystalline particles have a core-shell structure in which the cobalt core is surrounded by a carbon surface layer. These cobalt nanoparticles show an excellent magnetic performance and storage stability. The stability of the nanocrystalline particle has been discussed, based on the core-shell structure.

AB - Nanoparticles of the cobalt have been prepared by sonolysis of a Co(NO)(CO)3 in diphenylmethane solution under argon. The as-prepared product is an amorphous material having 10 nm diameter particles. Upon annealing in argon at 450 0C/5h, an air-stable cobalt nanocrystalline is formed with an increased particle size to ∼ 30 nm. The cobalt nanoparticles have been characterized by XRD, TEM, TGA, DSC, XPS, and magnetic susceptibility measurements. The nanocrystalline particles have a core-shell structure in which the cobalt core is surrounded by a carbon surface layer. These cobalt nanoparticles show an excellent magnetic performance and storage stability. The stability of the nanocrystalline particle has been discussed, based on the core-shell structure.

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The Sonochemical Preparation of Air-stable Cobalt Nanoparticles

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