Do inner shells of double-walled carbon nanotubes fluoresce?
The reported fluorescence from inner shells of double-walled carbon nanotubes (DWCNTs) is an intriguing and potentially useful property. A combination of bulk and single-molecule methods was used to study the spectroscopy, chemical quenching, mechanical rigidity, abundance, density, and TEM images of the near-IR emitters in DWCNT samples. DWCNT inner shell fluorescence is found to be weaker than SWCNT fluorescence by a factor of at least 10,000. Observable near-IR emission from DWCNT samples is attributed to SWCNT impurities.
Tsyboulski, DA; Hou, Y; Fakhri, N; Ghosh, S; Zhang, R; Bachilo, SM; Pasquali, M; Chen, L; Liu, J; Weisman, RB
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