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Generation of carbon tripods on copper by chemical vapor deposition

Published online by Cambridge University Press:  31 January 2011

F. Le Normand ,
L. Constant ,
G. Ehret  and
C. Speisser
F. Le Normand*
Affiliation:
IPCMS-GSI, UMR 1046 du CNRS, Bat 69, 23, rue du Loess, 67037 Strasbourg Cedex, FRANCE
L. Constant
Affiliation:
IPCMS-GSI, UMR 1046 du CNRS, Bat 69, 23, rue du Loess, 67037 Strasbourg Cedex, FRANCE
G. Ehret
Affiliation:
IPCMS-GSI, UMR 1046 du CNRS, Bat 69, 23, rue du Loess, 67037 Strasbourg Cedex, FRANCE
C. Speisser
Affiliation:
IPCMS-GSI, UMR 1046 du CNRS, Bat 69, 23, rue du Loess, 67037 Strasbourg Cedex, FRANCE
*
a)Address all correspondence to this author.
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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(111) surface while conditions of very poor diamond nucleation (104–105 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 relevant preparation method to grow in a controlled way new forms of carbon with a narrow size distribution.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 2 , February 1999 , pp. 560 - 564
Copyright
Copyright © Materials Research Society 1999

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