Preparation and characterization of self-formed CoFe2O4 ferrofluid

An ionic ferrofluid is prepared using coprecipitation and acid treatment techniques. In the ferrofluid, Co3+ and Fe2+ dissolved from CoFe2O4 nanoparticles via suitable acid attack, are absorbed on the surface of the magnetic particles and thus prevent them from aggregating. We call this self-formed...

Full description

Saved in:
Bibliographic Details
Published inJournal of materials research Vol. 22; no. 4; pp. 886 - 892
Main Authors Li, Jian, Dai, Dalin, Liu, Xiaodong, Lin, Yueqiang, Huang, Yan, Bai, Lang
Format Journal Article
LanguageEnglish
Published New York, USA Cambridge University Press 01.04.2007
Subjects
Chemical synthesis
Colloid
Magnetic
Chemical synthesis
Colloid
Magnetic
Online AccessGet full text

Cover

More Information
Summary:An ionic ferrofluid is prepared using coprecipitation and acid treatment techniques. In the ferrofluid, Co3+ and Fe2+ dissolved from CoFe2O4 nanoparticles via suitable acid attack, are absorbed on the surface of the magnetic particles and thus prevent them from aggregating. We call this self-formed ferrofluid. The colloidal particles in the ferrofluid are constructed with a magnetic core and a nonmagnetic surface layer about 2 nm. The size and the volume fraction of particles in the ferrofluid are described with geometric diameter d and volume fraction ϕv, as well as magnetic diameter dm and magnetic volume fraction ϕm. The viscous and magnetic properties of this ferrofluid depend on these parameters. The viscosity can be tunable for any volume fraction of particles by adding poly(ethylene glycol) into the carrier liquid.
Bibliography:ark:/67375/6GQ-MTHCF0WN-S
ArticleID:09337
istex:96CAE63ECCAD0B82083FBC74DC2F4A5283F8131F
PII:S0884291400093377
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2007.0134