jp067856w_si_001.pdf (494.16 kB)
Choking Effect of Single-Wall Carbon Nanotubes on Solvent Adsorption in Radial Breathing Mode
journal contribution
posted on 2007-03-01, 00:00 authored by Hiroaki Honda, Cheol-Min Yang, Hirofumi Kanoh, Hideki Tanaka, Tomonori Ohba, Yoshiyuki Hattori, Shigenori Utsumi, Katsumi KanekoThe radial breathing mode (RBM) frequency in Raman spectra of single-wall carbon nanotubes (SWNTs) is
upshifted (3−9 cm-1) by immersion of the SWNTs in various alcohols and water. However, the immersion
in the solvents does not cause any visible variation in the tangential mode frequency. The degree of this
RBM frequency upshift induced by the solvent adsorption corresponds to that caused by applying a high
pressure of 1 GPa (6−10 cm-1/GPa) in the literature. The degree of the RBM frequency upshift increases
with increases in the molecular weight of the solvents. RBM frequency upshift caused by immersion of
SWNTs in water is much larger than that by the molecular weight of alcohols, indicating the cluster formation
of water molecules.