Fig. 2: Hyperspectral imaging and photoluminescence spectroscopy of alkane-filled individual SWCNTs.

a Hyperspectral images of the E₁₁ PL from a single (6,5)-SWCNT that is filled with n-hexane along its length. Left: PL intensity image. Right: Map of the PL peak positions. b PL image of a (6,5)-SWCNT partially filled with n-hexane. Top: PL Peak position map. Bottom: PL intensity image. c PL spectra along the center of the n-hexane filled nanotube (indicated by the arrow in a) in comparison with an empty control. d PL spectra along the center of the nanotube partially filled with n-hexane (indicated by the arrow in b). e PL spectra from individual (6,5)-SWCNTs that are empty (blue), water-filled (orange), and n-hexane-filled (red). f Ensemble PL spectra of end-opened (red) and end-capped (6,5)-SWCNTs (blue) that had been incubated in n-hexane. Scale bars in a, b represent 500 nm. Note that in a, b, the peak position is from spectral fitting of each data set with a Gaussian function. The other spectra are fitted with a Voigt distribution function.