Nanoparticles by decomposition of long chain iron carboxylates: from spheres to stars and cubes.
Langmuir
; 27(6): 3044-50, 2011 Mar 15.
Article
in En
| MEDLINE
| ID: mdl-21294561
ABSTRACT
In this paper, we report the influence of reaction conditions and the chain length on the nanoparticle (NP) size and morphology for thermal decomposition of long-chain iron carboxylates such as Fe(III) oleate, palmitate, and myristate. In the majority of cases, spherical NPs are obtained; however, nonspherical morphologies were observed in some "extreme" conditions. For example, iron oxide nanostars are formed in eicosane at the Fe oleate/oleic acid ratio of 0.49 g/mL the highest oleic acid content when NPs still form. The cubic NPs with flat facets are obtained by decomposition of iron palmitate at the lowest palmitic acid fractions, but the most monodisperse cubes are formed at the Fe palmitate/palmitic acid ratio of 1.19 g/mL. Elliptical NPs are formed from Fe myristate with the most well-defined structure. Easy transformation of these NPs from wüstite to maghemite without aggregation and loss of solubility makes them excellent candidates for biomedical applications after proper functionalization described in our preceding papers.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Carboxylic Acids
/
Ferric Compounds
/
Nanoparticles
Language:
En
Journal:
Langmuir
Journal subject:
QUIMICA
Year:
2011
Type:
Article
Affiliation country:
United States