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Titolo:
Generation of carbon tripods on copper by chemical vapor deposition
Autore:
Le Normand, F; Constant, L; Ehret, G; Speisser, C;
Indirizzi:
CNRS, UMR 1046, GSI, IPCMS, F-67037 Strasbourg, France CNRS Strasbourg France F-67037 6, GSI, IPCMS, F-67037 Strasbourg, France
Titolo Testata:
JOURNAL OF MATERIALS RESEARCH
fascicolo: 2, volume: 14, anno: 1999,
pagine: 560 - 564
SICI:
0884-2914(199902)14:2<560:GOCTOC>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEGATIVE-CURVATURE; GRAPHITIC CARBON; DIAMOND; GROWTH; IRRADIATION; PRESSURE; ONIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Le Normand, F CNRS, UMR 1046, GSI, IPCMS, Bat 69,23 Rue Loess, F-67037 Strasbourg, France CNRS Bat 69,23 Rue Loess Strasbourg France F-67037 , France
Citazione:
F. Le Normand et al., "Generation of carbon tripods on copper by chemical vapor deposition", J MATER RES, 14(2), 1999, pp. 560-564

Abstract

We report the first observation of large graphitic capped clusters with threefold symmetry (tripods), They were generated under the diamond growth conditions by the chemical vapor deposition process activated by hot filaments on a Cu(lll) surface while conditions of very poor diamond nucleation (10(4)-10(5) cm(-2)) are fullfilled. They were characterized by direct high resolution imaging and selected area diffraction. Furthermore, a lot of them are connected. The behavior of hydrogen radicals to curl and to close limited-size graphitic planes is emphasized to explain their formation. These tripods appear to be readily stable carbon as they form only after other limited-size graphitic clusters such as graphite lumps or bucky onions. It is thus expected that the chemical vapor deposition process is a quite relevantpreparation method to grow in a controlled way new forms of carbon with a narrow size distribution.

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Documento generato il 02/12/20 alle ore 05:18:48