Fig. 5: Effect of the addition of oxygen gas.
From: Coalescence of carbon nanotubes while preserving the chiral angles
Optical absorption (−logT, where T is transmittance) spectra of (6,5) nanotube membranes after heat treatment at 600 °C in an 1 kPa argon atmosphere (a) with (10 Pa) and (b) without (<10−4 Pa) oxygen gas. The filled circles and asterisks indicate the lowest energy exciton peaks of (6,5) and (12,10) nanotubes, respectively. Insets in (a, b) are Raman spectra of the RBM. The filled circles and asterisks indicate the RBM peaks for (6,5) and (12,10) species, respectively. Source data are provided as a Source Data file.
