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Boron- and nitrogen-doped single-walled carbon nanohorns with graphite-like thin sheets prepared by CO2 laser ablation method
- Yuge, Ryota, Bandow, Shunji, Yudasaka, Masako, Toyama, Kiyohiko, Iijima, Sumio, Manako, Takashi
- Carbon 2017 v.111 pp. 675-680
- X-radiation, argon (noble gases), boron, carbon dioxide, graphene, nitrogen
- Boron- and nitrogen-codoped single walled carbon nanohorns (BN-SWCNHs) were prepared by CO2 laser ablation of a boron-containing carbon target under nitrogen atmosphere. The structures were spherical SWCNH aggregates containing many graphite-like thin sheets (GLSs), which was different from general SWCNHs. X-ray photoelectron spectra indicated that the doped quantities of boron and nitrogen were about 1.2 and 1.0 at.%, respectively. The boron and nitrogen atoms were implanted partially as the BN bonding in a graphene lattice, although they were also implanted individually as three-fold coordinated sp2 bonding. The boron-doped GLSs were preferentially prepared by CO2 laser ablation of a boron-containing carbon target under argon atmospheres. As a result, we found that the boron accelerated the formation of GLSs. The simple CO2 laser ablation method will be useful for heteroatoms doping into carbon nanohorns.