http://www.cnr.it/ontology/cnr/individuo/prodotto/ID173451

Nano-structured oriented carbon films grown by PLD and CVD methods (Articolo in rivista)

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Nano-structured oriented carbon films grown by PLD and CVD methods (Articolo in rivista) (literal)

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Alternative label

E. Cappelli; S. Orlando; G. Mattei; C. Scilletta; F. Corticelli; P. Ascarelli (2004)
Nano-structured oriented carbon films grown by PLD and CVD methods
in Applied physics. A, Materials science & processing (Print); Springer, New York (Stati Uniti d'America)
(literal)

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E. Cappelli; S. Orlando; G. Mattei; C. Scilletta; F. Corticelli; P. Ascarelli (literal)

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1 CNR IMIP, I-00016 Monterotondo, Rome, Italy; 2 CNR IMIP, I-85050 Potenza, Italy; 3 CNR IMM, I-40129 Bologna, Italy (literal)

Titolo

Abstract

PLD and CVD methods, plasma or bias assisted, have been used to prepare thin films of nano-clustered graphite. The experimental conditions (vz. deposition apparatus, substrate temperature, working pressure, inert sustaining gases parent species, and applied voltage) have been changed with the final aim of obtaining small graphene particles with the basal planes oriented along the growth vector and perpendicular to the n-Si<100> substrate. Pulsed laser ablation (Nd:YAG, 2nd harmonic: lambda=532 nm, hnu=2.33 eV, tau=7 ns, nu=10 Hz, Phiapproximate to7 J/cm(2)), assisted by an RF-plasma, of a pyrolytic graphite target gave good results for nano-structure formation, provided high substrate temperature and high inert gas pressure are maintained. CVD methods, in the presence of high substrate temperature and a DC bias, showed a good attitude to drive a longitudinal growth of graphene layers and nano-wires from a reactive gas flow of Argon/Hydrogen and Methane. The morphology of the films grown at different conditions have been characterised by scanning electron microscopy (SEM). Film quality and nano-particle dimensions have been estimated by Raman spectroscopy. (literal)

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