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Photoluminescence from single walled carbon nanotubes: a comparison between suspended and micelle-encapsulated nanotubes | | J. Lefebvre
; J. M. Fraser
; Y. Homma
; P. Finnie
; | | Date: |
18 Aug 2003 | | Subject: | cond-mat | | Abstract: | Single walled carbon nanotubes (SWNTs) are luminescent. Up to now, two preparation methods, both of which isolate individual SWNTs, have enabled the detection of nanotube bandgap photoluminescence (PL): encapsulation of individual SWNTs into surfactant micelles, and direct growth of individual SWNTs suspended in air between pillars. This paper compares the PL obtained from suspended SWNTs to published PL data obtained from encapsulated SWNTs. We find that emission peaks are blue-shifted by 28 meV on average for the suspended nanotubes as compared to the encapsulated nanotubes. Similarly, the resonant absorption peaks are blue-shifted on average by 16 meV. Both shifts depend weakly on the particular chirality and diameter of the SWNT. | | Source: | arXiv, cond-mat/0308359 | | Services: | Forum | Review | PDF | Favorites | |
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