title: Synthesis of colloidal dispersions of NiAl, ZnAl, NiCr, ZnCr, NiFe, and MgFe hydrotalcite-like nanoparticles.
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.
authors.affiliation: 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
authors.forename: Francesca
authors.initials: F
authors.lastname: Bellezza
authors.forename: Morena
authors.initials: M
authors.lastname: Nocchetti
authors.forename: Tamara
authors.initials: T
authors.lastname: Posati
authors.forename: Stefano
authors.initials: S
authors.lastname: Giovagnoli
authors.forename: Antonio
authors.initials: A
authors.lastname: Cipiciani