Fig. 3: Spatially resolved functionalization of SWCNT thin films.

a Schematic illustration of the functionalization procedure using UV-light (λ_ex = 365 nm) and a shadow mask, which is placed on top of a spin-coated nanotube network (polymer-wrapped (6,5) SWCNTs) on BCB-coated glass or silicon substrates. Irradiation through an aqueous AQS solution (2 mg mL⁻¹) in contact with the nanotube film leads to the formation of luminescent defects in the exposed areas. b AFM image of SWCNT network used for functionalization (scale bar, 1 µm). c Map of integrated Raman D/G⁺ ratios at the shadow mask edge (solid black line) after functionalization. d, e Averaged, normalized PL spectra (>100 averaged spectra) of masked and exposed areas after functionalization. Source data are provided as a Source Data file.