Physicochemical investigation of surfactant-coated gold nanoparticles synthesized in the confined space of dry reversed micelles

Vincenzo Turco Liveri, Alessandro Longo, Cristina Giordano

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34 Citazioni (Scopus)

Abstract

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.
Lingua originaleEnglish
pagine (da-a)494-499
Numero di pagine6
RivistaMaterials Chemistry and Physics
Volume98
Stato di pubblicazionePublished - 2006

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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