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Synthesis and Microstructural Analysis of Benzylthiol-functionalized Au Nanocrystals

Published online by Cambridge University Press:  01 February 2011

Floriana Vitale
Affiliation:
floriana.vitale@brindisi.enea.it, ENEA, Dept.of Physics Technology and New Materials (FIM), Strada Statale Appia, Brindisi I-72100, Italy
Luciana Mirenghi
Affiliation:
luciana.mirenghi@brindisi.enea.it, ENEA, Dept.of Physics Technology and New Materials (FIM), Strada Statale Appia, Brindisi, I-72100, Italy
Emanuela Piscopiello
Affiliation:
emanuela.piscopiello@brindisi.enea.it, ENEA, Dept.of Physics Technology and New Materials (FIM), Strada Statale Appia, Brindisi, I-72100, Italy
Maria Lucia Protopapa
Affiliation:
lucia.protopapa@brindisi.enea.it, ENEA, Dept.of Physics Technology and New Materials (FIM), Strada Statale Appia, Brindisi, I-72100, Italy
Leander Tapfer
Affiliation:
leander.tapfer@brindisi.enea.it, ENEA, Dept.of Physics Technology and New Materials (FIM), Strada Statale Appia, Brindisi, I-72100, Italy
Cinzia Giannini
Affiliation:
cinzia.giannini@ic.cnr.it, CNR, Institute of Crystallography, via Amendola 122/O, Bari, I-70126, Italy
Antonietta Guagliardi
Affiliation:
antonella.guagliardi@ic.cnr.it, CNR, Institute of Crystallography, via Amendola 122/O, Bari, I-70126, Italy
Antonio Cervellino
Affiliation:
antonio.cervellino@psi.ch, Lab. for Neutron Scattering, ETH Zurich and PSI Villigen, Villigen PSI, CH-5232, Switzerland
Giovanni Pellegrini
Affiliation:
pellegrini@padova.infm.it, University of Padova, Dept.of Physics, via Marzolo 8, Padova, I-35131, Italy
Enrico Trave
Affiliation:
trave@padova.infm.it, University of Padova, Dept.of Physics, via Marzolo 8, Padova, I-35131, Italy
Giovanni Mattei
Affiliation:
mattei@padova.infm.it, University of Padova, Dept.of Physics, via Marzolo 8, Padova, I-35131, Italy
Paolo Mazzoldi
Affiliation:
mazzoldi@padova.infm.it, University of Padova, Dept.of Physics, via Marzolo 8, Padova, I-35131, Italy
Ilaria Fratoddi
Affiliation:
ilaria.fratoddi@uniroma1.it, University "La Sapienza", Dept.of Chemistry, P.le Aldo Moro 5, Roma, I-00185, Italy
Maria Vittoria Russo
Affiliation:
mariavittoria.russo@uniroma1.it, University "La Sapienza", Dept.of Chemistry, P.le Aldo Moro 5, Roma, I-00185, Italy
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Abstract

We report on the synthesis and microstructural and microanalytical analysis of dodecanethiol and benzylthiol-stabilized Au nanoparticles (diameter range between 2 nm and 10 nm). Stable functionalized gold nanoparticles were synthesized by using two different routes: a two-phase liquid-liquid method and a one-phase method. The size, strain, shape and crystalline structure of the nanocrystals were determined by a full-pattern X-ray powder diffraction analysis and high-resolution electron microscopy. The chemical environment of the Au nanocrystals and their interaction with the thiols was investigated by X-ray photoelectron spectroscopy. Photoluminescence spectroscopy measurements show a characteristic IR emission at λ=960 nm of small sized Au nanocrystals (∼3 nm). The origin of this IR emission line seems to be correlated to the Au-S bonding and the size of the nanoparticles.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

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References

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Synthesis and Microstructural Analysis of Benzylthiol-functionalized Au Nanocrystals
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