Synthesis of colloidal dispersions of NiAl, ZnAl, NiCr, ZnCr, NiFe, and MgFe hydrotalcite-like nanoparticles

Francesca Bellezza; Morena Nocchetti; Tamara Posati; Stefano Giovagnoli; Antonio Cipiciani

doi:10.1016/j.jcis.2012.02.034

Synthesis of colloidal dispersions of NiAl, ZnAl, NiCr, ZnCr, NiFe, and MgFe hydrotalcite-like nanoparticles

J Colloid Interface Sci. 2012 Jun 15;376(1):20-7. doi: 10.1016/j.jcis.2012.02.034. Epub 2012 Mar 8.

Authors

Francesca Bellezza¹, Morena Nocchetti, Tamara Posati, Stefano Giovagnoli, Antonio Cipiciani

Affiliation

¹ Dipartimento di Chimica and Centro di Eccellenza Materiali Innovativi Nanostrutturati (CEMIN), Università di Perugia, Via Elce di Sotto 10, 06123 Perugia, Italy. cipan@unipg.it

PMID: 22459023
DOI: 10.1016/j.jcis.2012.02.034

Abstract

Colloidal aqueous dispersions of nanometric NiAl, ZnAl, NiCr, ZnCr, NiFe, and MgFe hydrotalcite-like compounds were prepared in a water/cetyltrimethylammonium bromide/n-butanol/isooctane microemulsion. Particle sizes were analyzed with different techniques, and the results confirm dimensions between 10 and 30 nm, except for ZnAl-HTlc (150-200 nm). A good colloidal stability of HTlc-NPs aqueous dispersions, investigated with DLS and Pz measurements, was obtained without the need for any stabilizing agent. SEM images clearly showed that the obtained HTlc posses a high tendency to spontaneously form homogeneous and dense stacking of plate-like HTlc crystals directly from aqueous solution, giving rise to the developing of functional materials in optical, electrical and magnetic fields.