title: Growth of metal-catalyst-free nitrogen-doped metallic single-wall carbon nanotubes.
abstract: Nitrogen-doped (N-doped) single-wall carbon nanotubes (SWCNTs) were synthesized by chemical vapor deposition using SiOx nanoparticles as a catalyst and ethylenediamine as the source of both carbon and nitrogen. The N-doped SWCNTs have a mean diameter of 1.1 nm and a narrow diameter range, with 92% of them having diameters from 0.7 to 1.4 nm. Multi-wavelength laser Raman spectra and temperature-dependent electrical resistance indicate that the SWCNT sample is enriched with metallic nanotubes. These N-doped SWCNTs showed excellent electrocatalytic activity for the oxygen reduction reaction and highly selective and sensitive sensing ability for dopamine detection.
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China. cliu@imr.ac.cn.
authors.forename: Jin-Cheng
authors.initials: JC
authors.lastname: Li
authors.forename: Peng-Xiang
authors.initials: PX
authors.lastname: Hou
authors.forename: Lili
authors.initials: L
authors.lastname: Zhang
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.forename: Hui-Ming
authors.initials: HM
authors.lastname: Cheng
mesh_terms: D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D004298:Dopamine / Q000737:chemistry; D004563:Electrochemistry; D004566:Electrodes; D005029:Ethylenediamines / Q000737:chemistry; D008422:Materials Testing; D008670:Metals / Q000737:chemistry*; D036103:Nanotechnology; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013696:Temperature
chemical_list: D005029:Ethylenediamines; D008670:Metals; D037742:Nanotubes, Carbon; C031234:ethylenediamine; D002244:Carbon; D012822:Silicon Dioxide; D009584:Nitrogen; D010100:Oxygen; D004298:Dopamine