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Journal of NanomaterialsVolume 2008 2008, Article ID 649130, 6 pages

Research Article

Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Via Selmi 2, 40126 Bologna, Italy

Dipartimento di Chimica Industriale e dei Materiali, Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy

Received 29 April 2008; Accepted 31 August 2008

Academic Editor: Fahrettin Yakuphanoglu

Copyright © 2008 Elisabetta Foresti et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

For the first time copper 3-6-mercaptohexylthiophene-protected nanoparticles Cu T6SH have been synthesized by a one-phase system, utilizing an -LiCl mixture in diglyme as the reducing reagent and avoiding water medium dissolving copper salts. The prepared nanoclusters, characterized by transmission electron microscopy TEM, have shown a constant spherical morphology with a size dimension of 5-6 nm in diameter. After their synthesis, no morphological evolution and irreversible aggregation process has been observed after a storage in at low temperature for a period up to six months long. Cu T6SH nanoparticles have been investigated by UV-Visible UV-Vis and Fourier transmission infrared FTIR spectroscopes to characterize the alkylthiophenes monolayer conformations and the particles optoelectronic properties. The UV-Vis reveals the lack of the surface plasmonic band, previously observed in Cu-nanosized clusters at about 556–570 nm, and shows a wide-band centered at 293 nm, probably due to the high-conformational surface ordering of thiophene rings on the Cu core. The results highlight the importance of the modifications ported to the well-known one-phase synthetic reactions to obtain a clear lack, even after a storage of six months, of any irreversible aggregation that has always characterized chain thiophene-protected metallic nanoparticles.





Autor: Elisabetta Foresti, Guido Fracasso, Massimiliano Lanzi, Isidoro Giorgio Lesci, Luisa Paganin, Tommaso Zuccheri, and Norberto

Fuente: https://www.hindawi.com/



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