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  • Synthesis of magnetic cobalt ferrite nanoparticles with controlled morphology, monodispersity and composition: the influence of solvent, surfactant, reductant and synthetic conditions.

Synthesis of magnetic cobalt ferrite nanoparticles with controlled morphology, monodispersity and composition: the influence of solvent, surfactant, reductant and synthetic conditions.

Nanoscale (2015-11-07)
Le T Lu, Ngo T Dung, Le D Tung, Cao T Thanh, Ong K Quy, Nguyen V Chuc, Shinya Maenosono, Nguyen T K Thanh
ABSTRACT

In our present work, magnetic cobalt ferrite (CoFe2O4) nanoparticles have been successfully synthesised by thermal decomposition of Fe(III) and Co(II) acetylacetonate compounds in organic solvents in the presence of oleic acid (OA)/ oleylamine (OLA) as surfactants and 1,2-hexadecanediol (HDD) or octadecanol (OCD-ol) as an accelerating agent. As a result, CoFe2O4 nanoparticles of different shapes were tightly controlled in size (range of 4-30 nm) and monodispersity (standard deviation only at ca. 5%). Experimental parameters, such as reaction time, temperature, surfactant concentration, solvent, precursor ratio, and accelerating agent, in particular, the role of HDD, OCD-ol, and OA/OLA have been intensively investigated in detail to discover the best conditions for the synthesis of the above magnetic nanoparticles. The obtained nanoparticles have been successfully applied for producing oriented carbon nanotubes (CNTs), and they have potential to be used in biomedical applications.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Chloroform, contains ethanol as stabilizer, ACS reagent, ≥99.8%
Sigma-Aldrich
Chloroform, puriss. p.a., reag. ISO, reag. Ph. Eur., 99.0-99.4% (GC)
Sigma-Aldrich
Chloroform, contains amylenes as stabilizer, ACS reagent, ≥99.8%
Sigma-Aldrich
Ethyl alcohol, Pure 190 proof, for molecular biology
Sigma-Aldrich
Chloroform, anhydrous, contains amylenes as stabilizer, ≥99%
Sigma-Aldrich
Dioctyl ether, 99%
Supelco
Ethanol solution, certified reference material, 2000 μg/mL in methanol
Sigma-Aldrich
1-Octadecanol, ReagentPlus®, 99%
Sigma-Aldrich
Oleylamine, technical grade, 70%
Sigma-Aldrich
Hexane, anhydrous, 95%
Sigma-Aldrich
Toluene, anhydrous, 99.8%
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, ACS spectrophotometric grade, 95.0%
Sigma-Aldrich
1-Octadecanol, 95%
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, anhydrous, ≥99.5%
Sigma-Aldrich
Toluene, ACS reagent, ≥99.5%
Sigma-Aldrich
Hexane, Laboratory Reagent, ≥95%
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, ACS reagent, ≥99.5%
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, meets USP testing specifications
SAFC
Oleylamine, ≥98% (primary amine)
Sigma-Aldrich
Ethyl alcohol, Pure, 160 proof, Excise Tax-free, Permit for use required
Sigma-Aldrich
Ethanol, purum, absolute ethanol, denaturated with 4.8% isopropanol, A15 IPA1, ≥99.8% (based on denaturant-free substance)
Sigma-Aldrich
Ethanol, ACS reagent, prima fine spirit, without additive, F15 o1
Sigma-Aldrich
Ethyl alcohol, Pure 200 proof, for molecular biology
Sigma-Aldrich
1,2-Hexadecanediol, technical grade, 90%