Journal
PHYSICAL REVIEW B
Volume 78, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.113409
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Funding
- MEXT Joint Project of Chemical Synthesis Core Research Institutions [20048004, 20340075]
- Grants-in-Aid for Scientific Research [20048004] Funding Source: KAKEN
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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. 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. The diameter dependence of PL dynamics is explained by exciton energy transfer between the inner and outer tubes through Forster-type dipole-dipole interaction.
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