Synthesis and characterization of large colloidal cobalt particles

Verónica Salgueiriño-Maceira, Miguel A. Correa-Duarte, Michael Farle, M. Arturo López-Quintela, Karl Sieradzki, Rodolfo Diaz

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Large colloidal environmentally stable silica-coated cobalt particles were synthesized by combining the sodium borohydride reduction in aqueous solution and the Stöber method. Low size polydisperse cobalt spheres with an average size of 95 nm were synthesized by using a borohydride reduction method and were subsequently coated with a thin layer of silica by means of hydrolysis and condensation of tetraethylorothosilicate (TEOS) in an aqueous/ ethanolic solution. The large uniform cobalt spheres consist of smaller metallic Co clusters, explaining the superparamagnetic behavior of the spheres. The particles were investigated by transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM).

Original languageEnglish (US)
Pages (from-to)1455-1458
Number of pages4
JournalLangmuir
Volume22
Issue number4
DOIs
StatePublished - Feb 14 2006

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Cobalt
cobalt
borohydrides
Silicon Dioxide
synthesis
Silica
silicon dioxide
aqueous solutions
Borohydrides
magnetic measurement
hydrolysis
Condensation
Hydrolysis
condensation
Sodium
sodium
Transmission electron microscopy
transmission electron microscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Salgueiriño-Maceira, V., Correa-Duarte, M. A., Farle, M., López-Quintela, M. A., Sieradzki, K., & Diaz, R. (2006). Synthesis and characterization of large colloidal cobalt particles. Langmuir, 22(4), 1455-1458. https://doi.org/10.1021/la0526885

Synthesis and characterization of large colloidal cobalt particles. / Salgueiriño-Maceira, Verónica; Correa-Duarte, Miguel A.; Farle, Michael; López-Quintela, M. Arturo; Sieradzki, Karl; Diaz, Rodolfo.

In: Langmuir, Vol. 22, No. 4, 14.02.2006, p. 1455-1458.

Research output: Contribution to journalArticle

Salgueiriño-Maceira, V, Correa-Duarte, MA, Farle, M, López-Quintela, MA, Sieradzki, K & Diaz, R 2006, 'Synthesis and characterization of large colloidal cobalt particles', Langmuir, vol. 22, no. 4, pp. 1455-1458. https://doi.org/10.1021/la0526885
Salgueiriño-Maceira V, Correa-Duarte MA, Farle M, López-Quintela MA, Sieradzki K, Diaz R. Synthesis and characterization of large colloidal cobalt particles. Langmuir. 2006 Feb 14;22(4):1455-1458. https://doi.org/10.1021/la0526885
Salgueiriño-Maceira, Verónica ; Correa-Duarte, Miguel A. ; Farle, Michael ; López-Quintela, M. Arturo ; Sieradzki, Karl ; Diaz, Rodolfo. / Synthesis and characterization of large colloidal cobalt particles. In: Langmuir. 2006 ; Vol. 22, No. 4. pp. 1455-1458.
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