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Mono- and bi-functional arenethiols as surfactants for gold nanoparticles: synthesis and characterization.

Vitale F, Fratoddi I, Battocchio C, Piscopiello E, Tapfer L, Russo MV, Polzonetti G, Giannini C - Nanoscale Res Lett (2011)

Bottom Line: Stable gold nanoparticles stabilized by different mono and bi-functional arenethiols, namely, benzylthiol and 1,4-benzenedimethanethiol, have been prepared by using a modified Brust's two-phase synthesis.Nanocrystals diameters have been tuned in the range 2 ÷ 9 nm by a proper variation of Au/S molar ratio.In particular, the formation of networks has been observed with interconnected gold nanoparticles containing 1,4-benzenedimethanethiol as ligand.

View Article: PubMed Central - HTML - PubMed

Affiliation: ENEA (Italian National Agency for New Technologies, Energy and the Sustainable Economic Development), UTTMATB (Technical Unit of Materials Technologies - Brindisi), Brindisi Research Centre, S,S, 7 Appia km, 706, 72100 Brindisi, Italy. floriana.vitale@enea.it.

ABSTRACT
Stable gold nanoparticles stabilized by different mono and bi-functional arenethiols, namely, benzylthiol and 1,4-benzenedimethanethiol, have been prepared by using a modified Brust's two-phase synthesis. The size, shape, and crystalline structure of the gold nanoparticles have been determined by high-resolution electron microscopy and full-pattern X-ray powder diffraction analyses. Nanocrystals diameters have been tuned in the range 2 ÷ 9 nm by a proper variation of Au/S molar ratio. The chemical composition of gold nanoparticles and their interaction with thiols have been investigated by X-ray photoelectron spectroscopy. In particular, the formation of networks has been observed with interconnected gold nanoparticles containing 1,4-benzenedimethanethiol as ligand.

No MeSH data available.


The average diameter of the dodecanethiol (DdT, filled triangles) and benzylthiol (BzT, open circles) functionalized gold nanoparticles versus the Au/S molar ratio (r) by using the one-phase synthesis.
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Figure 4: The average diameter of the dodecanethiol (DdT, filled triangles) and benzylthiol (BzT, open circles) functionalized gold nanoparticles versus the Au/S molar ratio (r) by using the one-phase synthesis.

Mentions: In order to achieve a better understanding of the role of the surfactant molecule in the gold colloidal synthesis, our attention was also focused on the results obtained for dodecanethiol-capped gold nanoparticles, previously studied by our research group [21]. In that case, a modulation of the AuNP size was easily achieved by increasing the Au/S molar ratio either with one-phase or with two-phase synthesis. A linear increase of the particle sizes was observed for the pivot dodecanethiol-capped gold nanoparticles by increasing the Au/S molar ratio (Figure 4).


Mono- and bi-functional arenethiols as surfactants for gold nanoparticles: synthesis and characterization.

Vitale F, Fratoddi I, Battocchio C, Piscopiello E, Tapfer L, Russo MV, Polzonetti G, Giannini C - Nanoscale Res Lett (2011)

The average diameter of the dodecanethiol (DdT, filled triangles) and benzylthiol (BzT, open circles) functionalized gold nanoparticles versus the Au/S molar ratio (r) by using the one-phase synthesis.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211147&req=5

Figure 4: The average diameter of the dodecanethiol (DdT, filled triangles) and benzylthiol (BzT, open circles) functionalized gold nanoparticles versus the Au/S molar ratio (r) by using the one-phase synthesis.
Mentions: In order to achieve a better understanding of the role of the surfactant molecule in the gold colloidal synthesis, our attention was also focused on the results obtained for dodecanethiol-capped gold nanoparticles, previously studied by our research group [21]. In that case, a modulation of the AuNP size was easily achieved by increasing the Au/S molar ratio either with one-phase or with two-phase synthesis. A linear increase of the particle sizes was observed for the pivot dodecanethiol-capped gold nanoparticles by increasing the Au/S molar ratio (Figure 4).

Bottom Line: Stable gold nanoparticles stabilized by different mono and bi-functional arenethiols, namely, benzylthiol and 1,4-benzenedimethanethiol, have been prepared by using a modified Brust's two-phase synthesis.Nanocrystals diameters have been tuned in the range 2 ÷ 9 nm by a proper variation of Au/S molar ratio.In particular, the formation of networks has been observed with interconnected gold nanoparticles containing 1,4-benzenedimethanethiol as ligand.

View Article: PubMed Central - HTML - PubMed

Affiliation: ENEA (Italian National Agency for New Technologies, Energy and the Sustainable Economic Development), UTTMATB (Technical Unit of Materials Technologies - Brindisi), Brindisi Research Centre, S,S, 7 Appia km, 706, 72100 Brindisi, Italy. floriana.vitale@enea.it.

ABSTRACT
Stable gold nanoparticles stabilized by different mono and bi-functional arenethiols, namely, benzylthiol and 1,4-benzenedimethanethiol, have been prepared by using a modified Brust's two-phase synthesis. The size, shape, and crystalline structure of the gold nanoparticles have been determined by high-resolution electron microscopy and full-pattern X-ray powder diffraction analyses. Nanocrystals diameters have been tuned in the range 2 ÷ 9 nm by a proper variation of Au/S molar ratio. The chemical composition of gold nanoparticles and their interaction with thiols have been investigated by X-ray photoelectron spectroscopy. In particular, the formation of networks has been observed with interconnected gold nanoparticles containing 1,4-benzenedimethanethiol as ligand.

No MeSH data available.