Abstract Gold 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 out by adding an opportune amount of anhydrous hydrazine/tetrahydrofuran solution to a suspension of HAuCl4-containing dry reversed micelles dispersed in organic solvent. UV–vis investigation ascertained the formation of stable metal gold nanoparticles and the analysis of FT-IR spectra highlighted the formation of an oriented surfactant monolayer at the nanoparticle surface. Simple evaporation under vacuum of the organic solvent leads to the preparation of very interesting gold nanoparticle/surfactant liquid crystal composites. Such nanocomposites, characterized by WAXS and SAXS, showed the presence of small (radius∼14 A° ) and stable gold nanoparticles dispersed in the surfactant matrix. It has been also emphasized that a simple washing process with ethanol is a suitable method to eliminate the excess of surfactant leaving a novel nanomaterial constituted by gold nanoparticles coated by a monolayer of opportunely oriented surfactant molecules. © 2005 Elsevier B.V. All rights reserved.

CALANDRA P, GIORDANO C, LONGO A, & TURCO LIVERI V (2006). Physicochemical investigation of surfactant-coated gold nanoparticles synthesized in the confined space of dry reversed micelles. MATERIALS CHEMISTRY AND PHYSICS, 98(2-3), 494-499 [10.1016/j.matchemphys.2005.09.068].

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

GIORDANO, Cristina;TURCO LIVERI, Vincenzo
2006

Abstract

Abstract Gold 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 out by adding an opportune amount of anhydrous hydrazine/tetrahydrofuran solution to a suspension of HAuCl4-containing dry reversed micelles dispersed in organic solvent. UV–vis investigation ascertained the formation of stable metal gold nanoparticles and the analysis of FT-IR spectra highlighted the formation of an oriented surfactant monolayer at the nanoparticle surface. Simple evaporation under vacuum of the organic solvent leads to the preparation of very interesting gold nanoparticle/surfactant liquid crystal composites. Such nanocomposites, characterized by WAXS and SAXS, showed the presence of small (radius∼14 A° ) and stable gold nanoparticles dispersed in the surfactant matrix. It has been also emphasized that a simple washing process with ethanol is a suitable method to eliminate the excess of surfactant leaving a novel nanomaterial constituted by gold nanoparticles coated by a monolayer of opportunely oriented surfactant molecules. © 2005 Elsevier B.V. All rights reserved.
CALANDRA P, GIORDANO C, LONGO A, & TURCO LIVERI V (2006). Physicochemical investigation of surfactant-coated gold nanoparticles synthesized in the confined space of dry reversed micelles. MATERIALS CHEMISTRY AND PHYSICS, 98(2-3), 494-499 [10.1016/j.matchemphys.2005.09.068].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/24018
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