title: Dual Raman features of double coaxial carbon nanotubes with N-doped and B-doped multiwalls.
abstract: Double coaxial carbon nanotubes with nitrogen (N)-doped and boron (B)-doped multiwalls possess composite Raman characteristics, originating not only from the outer N-doped but also from inner B-doped layers. Both N and B dopings result in substantial shifts of the characteristic D band and G band of sp(2) carbon constituting nanotube walls but in different ways. The downshift of the G band is correlated with the decreases of electrical resistivity of carbon nanotubes regardless of N or B doping.
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
authors.forename: Quan-Hong
authors.initials: QH
authors.lastname: Yang
authors.forename: Peng-Xiang
authors.initials: PX
authors.lastname: Hou
authors.forename: Masashi
authors.initials: M
authors.lastname: Unno
authors.forename: Seigo
authors.initials: S
authors.lastname: Yamauchi
authors.forename: Riichiro
authors.initials: R
authors.lastname: Saito
authors.forename: Takashi
authors.initials: T
authors.lastname: Kyotani
mesh_terms: D004563:Electrochemistry / Q000379:methods*; D008422:Materials Testing; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000032:analysis / Q000737:chemistry*; D012666:Semiconductors; D013059:Spectrum Analysis, Raman / Q000379:methods*
chemical_list: D037742:Nanotubes, Carbon