Journal
NANO LETTERS
Volume 8, Issue 5, Pages 1363-1367Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl080048r
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We studied the exciton energy transfer in pairs of semiconducting nanotubes using high-resolution optical microscopy and spectroscopy on the nanoscale. Photoluminescence from large band gap nanotubes within bundles is observed with spatially varying intensities due to distance-dependent internanotube transfer. The range of efficient energy transfer is found to be limited to a few nanometers because of competing fast nonradiative relaxation responsible for low photoluminescence quantum yield.
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