Semiconducting single-wall carbon nanotubes (SWCNTs) are a promising materials platform for near-infrared in vivo imaging, optical sensing, and single-photon emission at telecommunication wavelengths. The functionalization of SWCNTs with luminescent defects can result in considerably enhanced photoluminescence (PL) properties attributable to environment friendly trapping of extremely cellular excitons and red-shifted emission from these lure states. Among the many most studied luminescent defect sorts are oxygen and aryl defects which have largely related optical properties. Thus far, no direct comparability between SWCNTs functionalized with oxygen and aryl defects beneath an identical circumstances has been carried out. Right here, we make use of a mixture of spectroscopic strategies to quantify the variety of defects, their distribution alongside the nanotubes and thus their exciton trapping efficiencies. The totally different slopes of Raman D/G+ ratios versus calculated defect densities from PL quantum yield measurements point out substantial dissimilarities between oxygen and aryl defects. Supported by statistical evaluation of single-nanotube PL spectra at cryogenic temperatures they reveal clustering of oxygen defects. The clustering of two–3 oxygen defects, which act as a single exciton lure, happens regardless of the functionalization technique and thus allows the usage of easy equations to find out the density of oxygen defects and defect clusters in SWCNTs primarily based on customary Raman spectroscopy. The offered analytical method is a flexible and delicate software to check defect distribution and clustering in SWCNTs and might be utilized to any new functionalization technique.
