Nanostructured carbon films produced by supersonic cluster beam deposition have been studied by in situ Raman spectroscopy. Raman spectra show the formation of a sp2 solid with a very large fraction of sp-coordinated carbyne species showing a long-term stability under ultra high vacuum. Distinct Raman contributions from polyyne and cumulene species have been observed. The long-term stability and the behavior of carbyne-rich films under different gas exposure have been characterized showing different evolution for different sp configurations. Our experiments confirm theoretical predictions and demonstrate the possibility of easily producing a stable carbyne-rich pure carbon solid. The stability of the sp2-sp network has important implications for astrophysics and for the production of novel carbon-based systems.
Cluster-beam deposition and in situ characterization of carbyne-rich carbon films / L. Ravagnan, F. Siviero, C. Lenardi, P. Piseri, E. Barborini, P. Milani, C.S. Casari, A. Li Bassi, C.E. Bottani. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 89:28(2002 Dec 31), pp. 285506.1-285506.4.
Cluster-beam deposition and in situ characterization of carbyne-rich carbon films
L. RavagnanPrimo
;C. Lenardi;P. Piseri;P. Milani;
2002
Abstract
Nanostructured carbon films produced by supersonic cluster beam deposition have been studied by in situ Raman spectroscopy. Raman spectra show the formation of a sp2 solid with a very large fraction of sp-coordinated carbyne species showing a long-term stability under ultra high vacuum. Distinct Raman contributions from polyyne and cumulene species have been observed. The long-term stability and the behavior of carbyne-rich films under different gas exposure have been characterized showing different evolution for different sp configurations. Our experiments confirm theoretical predictions and demonstrate the possibility of easily producing a stable carbyne-rich pure carbon solid. The stability of the sp2-sp network has important implications for astrophysics and for the production of novel carbon-based systems.Pubblicazioni consigliate
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