In this article the adsorption of 3-methylthiophene on planar and nanoparticle Au surfaces is investigated. The resulting systems are compared with a benchmark system based on 1-decanethiol. The characterization data collected evidence the formation of a packed 3-methylthiophene SAM on the planar surface. In particular, spectroscopic investigations suggest that 3-methylthiophene aromatic system is not adsorbed on the surface through the pi-electron system but rather through the S atom alone. On the other hand, the behavior of 3-methylthiophene on nanoparticle surfaces is notably different from that of the alkanethiol. Only a limited fraction of the surface of Au nanoparticles results to be actually coated after purification; this notwithstanding, the nanoparticle growth seems to be strongly influenced by the presence of such a labile encapsulating agent.
3-methylthiophene Self Assembled Monolayers on planar and nanoparticle Au surfaces / TERZI, Fabio; SEEBER, Renato; PIGANI, Laura; ZANARDI, Chiara; PASQUALI, Luca; NANNARONE, Stefano; M., FABRIZIO; S., DAOLIO. - In: JOURNAL OF PHYSICAL CHEMISTRY. B, CONDENSED MATTER, MATERIALS, SURFACES, INTERFACES & BIOPHYSICAL. - ISSN 1520-6106. - STAMPA. - 109:41(2005), pp. 19397-19402. [10.1021/jp0530956]
3-methylthiophene Self Assembled Monolayers on planar and nanoparticle Au surfaces
TERZI, Fabio;SEEBER, Renato;PIGANI, Laura;ZANARDI, Chiara;PASQUALI, Luca;NANNARONE, Stefano;
2005
Abstract
In this article the adsorption of 3-methylthiophene on planar and nanoparticle Au surfaces is investigated. The resulting systems are compared with a benchmark system based on 1-decanethiol. The characterization data collected evidence the formation of a packed 3-methylthiophene SAM on the planar surface. In particular, spectroscopic investigations suggest that 3-methylthiophene aromatic system is not adsorbed on the surface through the pi-electron system but rather through the S atom alone. On the other hand, the behavior of 3-methylthiophene on nanoparticle surfaces is notably different from that of the alkanethiol. Only a limited fraction of the surface of Au nanoparticles results to be actually coated after purification; this notwithstanding, the nanoparticle growth seems to be strongly influenced by the presence of such a labile encapsulating agent.File | Dimensione | Formato | |
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JPhysChemB_thiols_2005.pdf
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