Nanotechnology

Researchers from Kyoto University report on findings in physics

  2008 NOV 24 - (VerticalNews.com) -- "We have studied photoluminescence (PL) spectrum and dynamics of the inner nanotubes in double-walled carbon nanotubes (DWNTs) and compared PL properties between DWNTs and single-walled carbon nanotubes (SWNTs). The PL peak energies of the inner tubes are redshifted from those of SWNTs with the same chiral indices," scientists writing in the journal Physical Review B report.

  "This PL redshift is enhanced with an increase in the inner tube diameter. The PL lifetime of DWNTs increases with a decrease in the inner tube diameter," wrote H. Hirori and colleagues, Kyoto University.

  The researchers concluded: "The diameter dependence of PL dynamics is explained by exciton energy transfer between the inner and outer tubes through Forster-type dipole-dipole interaction."

  Hirori and colleagues published their study in Physical Review B (Exciton energy transfer between the inner and outer tubes in double-walled carbon nanotubes. Physical Review B, 2008;78(11):3409).

  Additional information can be obtained by contacting H. Hirori, Kyoto University, Institute Chemical Research, Kyoto 6110011, Japan.

  The publisher of the journal Physical Review B can be contacted at: American Physical Society, One Physics Ellipse, College Pk, MD 20740-3844, USA.

  Keywords: Emerging Technologies, Nanotech, Nanotechnology, Nanotube, Single Walled Carbon NanotubesPhysics, Kyoto University.

  This article was prepared by VerticalNews Nanotechnology editors from staff and other reports. Copyright 2008, VerticalNews Nanotechnology via VerticalNews.com.