Resumo

HERNANDEZ, R. et al. Obtaining and characterization of ZnSe nanoparticles from aqueous colloidal dispersions. Superf. vacío [online]. 2014, vol.27, n.1, pp.11-14. ISSN 1665-3521.

Structural, morphological and compositional characterizations of zinc selenide (ZnSe) nanoparticles (NPs) are presented. ZnSe NPs have been obtained by colloidal synthesis in aqueous solution using zinc nitrate (Zn(NO₃)₂) and elemental selenium (Se) as precursors, sodium borohydride (NaBH₄) as reducing agent, a solution of sodium hydroxide (NaOH) and pentasodium tripolyphosphate (Na₅P₃O₁₀) named Extran was used as surfactant. The pH was varied from 8 to 11 and the Zn:Se molar concentration was varied from 3:1 to 1:3. A cleaning process was applied to eliminate the by-products using hydrochloric acid (HCl). ZnSe NPs exhibit a cubic zinc-blende structure. The NPs size was estimated between 4.9 nm and 3.0 nm and depends on molar concentration.

Palavras-chave : ZnSe; Nanoparticles; Colloidal method; Aqueous media.

        · texto em Inglês     · Inglês ( pdf )