Preparation and characterization of cobalt-based nanostructured materials |
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Authors: | G Carotenuto L Pasquini E Milella M Pentimalli R Lamanna L Nicolais |
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Institution: | (1) Istituto per i Materiali Compositi e Biomedici. Consiglio Nazionale delle Ricerche. Piazzale Tecchio, 80 - 80125, Napoli, Italy, IT;(2) Dipartimento di Fisica. Universitá di Bologna e INFM V.le Berti-Pichat 6/2I - 40127, Bologna, Italy, IT;(3) MAT-COMP. ENEA C.R. Brindisi S.S. 7 Appia Km 713.7 - 72100, Brindisi, Italy, IT;(4) BIOTEC-AGRO. ENEA C.R. Trisaia S.S. 106 Jonica Km 419.5 - 75026, Rotondella, Matera, Italy, IT |
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Abstract: | Nano-sized cobalt clusters passivated by alkane-thiol molecules were obtained by the action of concentrated thiol solutions
on micrometric cobalt particles. Thiol molecules caused an erosive process on the metal grains with the consequent formation
of nano-sized metal debris and cobalt thiolate as by-product. The final material microstructure was composed by cobalt clusters
embedded into a continuum cobalt thiolate matrix. Depending on the thiol molecule length, the material texture ranged from
rubbery to waxy. These new types of nanocomposite materials were found to be crystalline, thermally stable up to ca. 300 °C, intensely red colored, and high hydrophobic. In addition, they generated polymeric structures when dissolved in non-polar
solvents.
Received 27 September 2002 Published online 6 March 2003
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ID="a"e-mail: giancaro@unina.it |
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Keywords: | PACS 68 43 -h Chemisorption/physisorption: adsorbates on surfaces – 81 07 Pr Organic-inorganic hybrid nanostructures – 81 16 Be Chemical synthesis methods |
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