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Bar-shaped nanoparticles of iron(II) hydroxide
KTH, School of Information and Communication Technology (ICT), Material Physics, Functional Materials, FNM.
2008 (English)In: Journal of nanoparticle research, ISSN 1388-0764, E-ISSN 1572-896X, Vol. 10, no 2, 377-381 p.Article in journal (Refereed) Published
Abstract [en]

Formation of elongated nanoparticles was observed when FE3O4 was precipitated from solutions containing excess of Fe2+. The average diameter of the particles was 23 nm; the length to diameter ratio was up to 14. This shape was an unexpected phenomenon because bar- or needle-like nanoparticles have been earlier reported only for Fe(III)-based materials. Chemical analysis revealed Fe(OH)(2) nature of the obtained particles. In addition, this conclusion was verified with a new simple method for quantitative evaluation of the particle morphology. Application of this method to the mixed Fe(OH)(2/)Fe3O4 samples allowed to distinguish between the two different compounds and to attribute different morphologies to Fe(OH)(2) or Fe3O4. Results indicate that bars are frequent shapes of nano-sized iron oxides/hydroxides.

Place, publisher, year, edition, pages
2008. Vol. 10, no 2, 377-381 p.
Keyword [en]
elongated nanoparticles, nanoparticles, iron oxides, spinel phases, electron microscopy, oxide nanoparticles
Identifiers
URN: urn:nbn:se:kth:diva-17255DOI: 10.1007/s11051-007-9259-xISI: 000251730400016Scopus ID: 2-s2.0-37349041411OAI: oai:DiVA.org:kth-17255DiVA: diva2:335298
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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