Abstract
The discovery of buckminsterfullerene (C[sub 60]) and its production in macroscopic quantities has stimulated a great deal of research. More recently, attention has turned towards other curved graphitic networks, such as the giant fullerenes (C[sub n], n > 100) and carbon nanotubes. A general mechanism has been proposed in which the graphitic sheets bend in an attempt to eliminate the highly energetic dangling bonds present at the edge of the growing structure. Here, I report the response of carbon soot particles and tubular graphitic structures to intense electron-beam irradiation in a high-resolution electron microscope; such conditions resemble a high-temperature regime, permitting a degree of structural fluidity. With increased irradiation, there is a gradual reorganization of the initial material into quasi-spherical particles composed of concentric graphitic shells. This lends weight to the nucleation scheme proposed for fullerenes, and moreover, suggests that planar graphite may not be the most stable allotrope of carbon in systems of limited size. (Author).
Ugarte, D
[1]
- Ecole Polytechnique Federale, Lausanne (Switzerland)
Citation Formats
Ugarte, D.
Curling and closure of graphitic networks under electron-beam irradiation.
United Kingdom: N. p.,
1992.
Web.
doi:10.1038/359707a0.
Ugarte, D.
Curling and closure of graphitic networks under electron-beam irradiation.
United Kingdom.
https://doi.org/10.1038/359707a0
Ugarte, D.
1992.
"Curling and closure of graphitic networks under electron-beam irradiation."
United Kingdom.
https://doi.org/10.1038/359707a0.
@misc{etde_6856857,
title = {Curling and closure of graphitic networks under electron-beam irradiation}
author = {Ugarte, D}
abstractNote = {The discovery of buckminsterfullerene (C[sub 60]) and its production in macroscopic quantities has stimulated a great deal of research. More recently, attention has turned towards other curved graphitic networks, such as the giant fullerenes (C[sub n], n > 100) and carbon nanotubes. A general mechanism has been proposed in which the graphitic sheets bend in an attempt to eliminate the highly energetic dangling bonds present at the edge of the growing structure. Here, I report the response of carbon soot particles and tubular graphitic structures to intense electron-beam irradiation in a high-resolution electron microscope; such conditions resemble a high-temperature regime, permitting a degree of structural fluidity. With increased irradiation, there is a gradual reorganization of the initial material into quasi-spherical particles composed of concentric graphitic shells. This lends weight to the nucleation scheme proposed for fullerenes, and moreover, suggests that planar graphite may not be the most stable allotrope of carbon in systems of limited size. (Author).}
doi = {10.1038/359707a0}
journal = []
volume = {359:6397}
journal type = {AC}
place = {United Kingdom}
year = {1992}
month = {Oct}
}
title = {Curling and closure of graphitic networks under electron-beam irradiation}
author = {Ugarte, D}
abstractNote = {The discovery of buckminsterfullerene (C[sub 60]) and its production in macroscopic quantities has stimulated a great deal of research. More recently, attention has turned towards other curved graphitic networks, such as the giant fullerenes (C[sub n], n > 100) and carbon nanotubes. A general mechanism has been proposed in which the graphitic sheets bend in an attempt to eliminate the highly energetic dangling bonds present at the edge of the growing structure. Here, I report the response of carbon soot particles and tubular graphitic structures to intense electron-beam irradiation in a high-resolution electron microscope; such conditions resemble a high-temperature regime, permitting a degree of structural fluidity. With increased irradiation, there is a gradual reorganization of the initial material into quasi-spherical particles composed of concentric graphitic shells. This lends weight to the nucleation scheme proposed for fullerenes, and moreover, suggests that planar graphite may not be the most stable allotrope of carbon in systems of limited size. (Author).}
doi = {10.1038/359707a0}
journal = []
volume = {359:6397}
journal type = {AC}
place = {United Kingdom}
year = {1992}
month = {Oct}
}