TY - JOUR
T1 - New fullerenes in the B-C-N system
T2 - Synthesis and analysis by an electron beam
AU - Golberg, Dmitri
AU - Bando, Yoshio
AU - Stéphan, Odile
AU - Bourgeois, Laure
AU - Kurashima, Keiji
AU - Sasaki, Takayoshi
AU - Sato, Tadao
AU - Goringe, Chris
PY - 1999/1/1
Y1 - 1999/1/1
N2 - Numerous fullerenes were synthesized in various B-C-N materials by in-situ electron beam irradiation in a high-resolution transmission analytical electron microscope JEM-3000F. Boron-doped graphitic carbons, hexagonal and rhombohedral boron nitrides, and ternary B-C-N turbostratic materials served as the starting materials for irradiation. The transformation to fullerene-like morphology from originally fiat or curled and jumbled graphene-like sheets or polygonal particles takes place through a solid-state phase transition by rearrangement of atoms, which is drastically enhanced by thermal and irradiation-induced diffusion. The scale of generated fullerenes ranges from ~1 nm (single-shelled objects) to 50 nm (giant nested objects having up to 75 shells). Fullerene symmetry and chemical composition were clarified by high-resolution transmission electron microscopy and electron energy loss spectroscopy, respectively. Finally, 3-D fullerene models were developed which particularly emphasize icosahedral symmetry for B-C and B-C-N fullerenes, and octahedral symmetry for BN fullerenes.
AB - Numerous fullerenes were synthesized in various B-C-N materials by in-situ electron beam irradiation in a high-resolution transmission analytical electron microscope JEM-3000F. Boron-doped graphitic carbons, hexagonal and rhombohedral boron nitrides, and ternary B-C-N turbostratic materials served as the starting materials for irradiation. The transformation to fullerene-like morphology from originally fiat or curled and jumbled graphene-like sheets or polygonal particles takes place through a solid-state phase transition by rearrangement of atoms, which is drastically enhanced by thermal and irradiation-induced diffusion. The scale of generated fullerenes ranges from ~1 nm (single-shelled objects) to 50 nm (giant nested objects having up to 75 shells). Fullerene symmetry and chemical composition were clarified by high-resolution transmission electron microscopy and electron energy loss spectroscopy, respectively. Finally, 3-D fullerene models were developed which particularly emphasize icosahedral symmetry for B-C and B-C-N fullerenes, and octahedral symmetry for BN fullerenes.
KW - Electron energy loss spectroscopy
KW - Electron irradiation
KW - Fullerenes
KW - High-resolution analytical electron microscopy
UR - http://www.scopus.com/inward/record.url?scp=0033492078&partnerID=8YFLogxK
U2 - 10.1093/oxfordjournals.jmicro.a023738
DO - 10.1093/oxfordjournals.jmicro.a023738
M3 - Article
AN - SCOPUS:0033492078
SN - 0022-0744
VL - 48
SP - 701
EP - 709
JO - Journal of Electron Microscopy
JF - Journal of Electron Microscopy
IS - 6
ER -