Magnetic colloids composed of metal nanoparticles of Fe

X. X. Zhang; B. X. Qin; G. H. Wen; Y. S. Kwok; K. K. Fung

doi:10.1016/S0928-4931(01)00285-5

Magnetic colloids composed of metal nanoparticles of Fe

X. X. Zhang, B. X. Qin, G. H. Wen, Y. S. Kwok, K. K. Fung

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

4 Scopus citations

Abstract

High magnetization, oil-based magnetic colloids (or magnetic fluids) have been fabricated with metallic Fe nanoparticles. These particles remain unchanged for several years in oil, water and air, etc. These particles have a core-shell structure. The shell is an epitaxial γ-Fe₂O₃ layer of 4 nm. It is the epitaxial oxide layer that prevents the metal core from further oxidization. Therefore, these particles show a much higher magnetization than Fe₃O₄ and γ-Fe₂O₃ particles, which are traditional materials for making ferrofluids. The preliminary results indicate that with these metallic Fe nanoparticles the magnetization of the colloids increases significantly.

Original language	English (US)
Pages (from-to)	119-121
Number of pages	3
Journal	Materials Science and Engineering C
Volume	16
Issue number	1-2
DOIs	https://doi.org/10.1016/S0928-4931(01)00285-5
State	Published - Oct 20 2001
Externally published	Yes

Keywords

Magnetic colloids
Metal nanoparticles
Oxidation

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/S0928-4931(01)00285-5

Cite this

@article{aba7d1702a4b48d894a5d99071352fa8,

title = "Magnetic colloids composed of metal nanoparticles of Fe",

abstract = "High magnetization, oil-based magnetic colloids (or magnetic fluids) have been fabricated with metallic Fe nanoparticles. These particles remain unchanged for several years in oil, water and air, etc. These particles have a core-shell structure. The shell is an epitaxial γ-Fe2O3 layer of 4 nm. It is the epitaxial oxide layer that prevents the metal core from further oxidization. Therefore, these particles show a much higher magnetization than Fe3O4 and γ-Fe2O3 particles, which are traditional materials for making ferrofluids. The preliminary results indicate that with these metallic Fe nanoparticles the magnetization of the colloids increases significantly.",

keywords = "Magnetic colloids, Metal nanoparticles, Oxidation",

author = "Zhang, {X. X.} and Qin, {B. X.} and Wen, {G. H.} and Kwok, {Y. S.} and Fung, {K. K.}",

year = "2001",

month = oct,

day = "20",

doi = "10.1016/S0928-4931(01)00285-5",

language = "English (US)",

volume = "16",

pages = "119--121",

journal = "Materials Science and Engineering C",

issn = "0928-4931",

publisher = "Elsevier BV",

number = "1-2",

}

TY - JOUR

T1 - Magnetic colloids composed of metal nanoparticles of Fe

AU - Zhang, X. X.

AU - Qin, B. X.

AU - Wen, G. H.

AU - Kwok, Y. S.

AU - Fung, K. K.

PY - 2001/10/20

Y1 - 2001/10/20

N2 - High magnetization, oil-based magnetic colloids (or magnetic fluids) have been fabricated with metallic Fe nanoparticles. These particles remain unchanged for several years in oil, water and air, etc. These particles have a core-shell structure. The shell is an epitaxial γ-Fe2O3 layer of 4 nm. It is the epitaxial oxide layer that prevents the metal core from further oxidization. Therefore, these particles show a much higher magnetization than Fe3O4 and γ-Fe2O3 particles, which are traditional materials for making ferrofluids. The preliminary results indicate that with these metallic Fe nanoparticles the magnetization of the colloids increases significantly.

AB - High magnetization, oil-based magnetic colloids (or magnetic fluids) have been fabricated with metallic Fe nanoparticles. These particles remain unchanged for several years in oil, water and air, etc. These particles have a core-shell structure. The shell is an epitaxial γ-Fe2O3 layer of 4 nm. It is the epitaxial oxide layer that prevents the metal core from further oxidization. Therefore, these particles show a much higher magnetization than Fe3O4 and γ-Fe2O3 particles, which are traditional materials for making ferrofluids. The preliminary results indicate that with these metallic Fe nanoparticles the magnetization of the colloids increases significantly.

KW - Magnetic colloids

KW - Metal nanoparticles

KW - Oxidation

UR - http://www.scopus.com/inward/record.url?scp=0035922743&partnerID=8YFLogxK

U2 - 10.1016/S0928-4931(01)00285-5

DO - 10.1016/S0928-4931(01)00285-5

M3 - Article

AN - SCOPUS:0035922743

SN - 0928-4931

VL - 16

SP - 119

EP - 121

JO - Materials Science and Engineering C

JF - Materials Science and Engineering C

IS - 1-2

ER -

Magnetic colloids composed of metal nanoparticles of Fe

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this