Author/Authors :
Sato، نويسنده , , Yoshinori and Jeyadevan، نويسنده , , Balachandran and Hatakeyama، نويسنده , , Rikizo and Kasuya، نويسنده , , Atsuo and Tohji، نويسنده , , Kazuyuki، نويسنده ,
Abstract :
We investigated the electronic properties of the radial single-walled carbon nanotubes (SWCNTs) by using the Raman and the UV–Vis–NIR spectroscopy. The radial SWCNTs for the analysis were synthesized by the arc-discharge method with Ce as a catalyst. The yield of the radial SWCNTs with 1.55 nm diameter and 60 nm length was as high as 20% in the soot. From the UV–Vis–NIR spectrum and the tangential mode of Raman spectra, the radial SWCNTs were confirmed to be composed of semiconducting (0.64 and 1.14 eV for Vs1 → Cs1 and Vs2 → Cs2) and metallic (1.60 eV for Vm1 → Cm1) nanotubes.
