AbstractGold nanoparticle/surfactant composites have been synthesized by a novel reduction reaction in the confined space of dry sodium bis(2-ethylhexyl)sulfosuccinate (AOT) or lecithin reversed micelles dispersed in n-heptane and cyclohexane, respectively. The reaction was carried outby adding an opportune amount of anhydrous hydrazine/tetrahydrofuran solution to a suspension of HAuCl4-containing dry reversed micellesdispersed in organic solvent. UV–vis investigation ascertained the formation of stable metal gold nanoparticles and the analysis of FT-IR spectrahighlighted the formation of an oriented surfactant monolayer at the nanoparticle surface. Simple evaporation under vacuum of the organic solventleads to the preparation of very interesting gold nanoparticle/surfactant liquid crystal composites. Such nanocomposites, characterized by WAXSand SAXS, showed the presence of small (radius∼14 A° ) and stable gold nanoparticles dispersed in the surfactant matrix. It has been also emphasizedthat a simple washing process with ethanol is a suitable method to eliminate the excess of surfactant leaving a novel nanomaterial constituted bygold nanoparticles coated by a monolayer of opportunely oriented surfactant molecules.© 2005 Elsevier B.V. All rights reserved.
|Numero di pagine||6|
|Rivista||Materials Chemistry and Physics|
|Stato di pubblicazione||Published - 2006|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics