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Onion-Like Nanoscale Structures and Fullerene-Type Cages Formed by Electron Irradiation of Turbostratic Bx.C1-x (x<0.2)

Published online by Cambridge University Press:  10 February 2011

D. Golberg ,
Y. Bando ,
K. Kurashima  and
T. Sasaki
D. Golberg
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki 305, JAPAN, golberg@nirim.go.jp
Y. Bando
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki 305, JAPAN, golberg@nirim.go.jp
K. Kurashima
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki 305, JAPAN, golberg@nirim.go.jp
T. Sasaki
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki 305, JAPAN, golberg@nirim.go.jp
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Abstract

Flakes of CVD grown BxC1-x, (x<0.2) films were exposed to intense electron irradiation (flux density up to ∼100 A/cm2) in a 300 kV high resolution electron microscope equipped with a field emission gun. The starting flakes revealed a turbostratic BxC1-x structure. The composition of the starting materials and irradiated products was determined by using electron energy loss spectroscopy (EELS). Depending on the electron dose applied, irradiation of the turbostratic material led to formation of soap-bubble-like irregularly-shaped objects (linear dimensions of ∼2–5 nm), onion- and semi-onion-like structures (d∼10nm), nested fullerenes (3–14 shells) and elementary fullerene-type cages (d∼0.7 nm). It is thought that these curled and closed nanostructures arise from a continuous bending of the hexagonal Bx C1-x sheets under electron irradiation. Finally, some possible structural models of BxC1-x fullerenes are considered.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 481: Symposium P – Science and Technology of Semiconductor Surface Preparation , 1997 , 389
Copyright
Copyright © Materials Research Society 1998

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References

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