1. Synthesis of colloidal dispersions of NiAl, ZnAl, NiCr, ZnCr, NiFe, and MgFe hydrotalcite-like nanoparticles
- Author
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Francesca Bellezza, Morena Nocchetti, Antonio Cipiciani, Stefano Giovagnoli, and Tamara Posati
- Subjects
Nial ,Materials science ,Aqueous solution ,Hydrotalcite ,Mineralogy ,Nanoparticle ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Biomaterials ,chemistry.chemical_compound ,Colloid ,Colloid and Surface Chemistry ,chemistry ,Chemical engineering ,Bromide ,Particle ,Microemulsion ,computer ,computer.programming_language - 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.
- Published
- 2012