Fig. 2: Versatility of photocatalytic SWCNT functionalization. | Nature Communications

Fig. 2: Versatility of photocatalytic SWCNT functionalization.

From: Circular dichroism of quantum defects in carbon nanotubes created by photocatalytic oxygen functionalization

Fig. 2

a Normalized PL spectra of different oxygen-functionalized SWCNT species with diameters ranging from 0.71 nm to 0.92 nm (excitation at respective E22 optical transition wavelengths as determined from UV-Vis-NIR absorption spectra, see Supplementary Fig. 11). b Functionalization of (6,5) SWCNTs after surfactant exchange to biocompatible polymer PL-PEG5000 (concentration 2 mg mL−1, without any post-treatment after dialysis). c Scale-up of photocatalytic functionalization using CoMoCAT raw material (SDS, 0.33% w/v) at high SWCNT concentrations (≈ 0.1 g L−1); black line: pristine SWCNTs; light blue: 10 min UV irradiation; dark blue: 20 min UV irradiation. The inset shows NIR PL images (950–1600 nm) of diluted pristine and functionalized CoMoCAT dispersions at identical concentration (525 nm excitation). d Functionalization of (6,5) SWCNTs shortened by tip sonication (6 h, average length of ≈ 63 nm). e Photocatalytic functionalization of PFO-BPy-wrapped (6,5) SWCNTs in THF using 2-tert-butylanthraquinone as photocatalyst. Source data are provided as a Source Data file.

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