Semiconducting single-wall carbon nanotubes (SWCNTs) are a promising material for single-photon emission (SPE) applications. Each single-chirality (n,m)-SWCNT has a one-dimensional graphene lattice and unique cylinder diameter, which gives its intrinsic optical bandgap properties. Defects in the sp2 lattice structure of these SWCNTs create local bandgap changes that trap excitons allowing for a wavelength-specific single-photon generation. Hence, a key development is a controlled, covalent modification of the sp2 lattice that increases quantum yield and tunability through various chemical modifications. Here, we present defect engineered SWCNTs with a covalently modified lattice directed by chemical reactions of the DNA wrapping. We use absorption, photoluminescence and Resonance Raman spectroscopy to characterize the unique defects and determine the extent of the lattice-lattice interaction.

Creating DNA-guided defects in SP2 carbon lattice

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ACS Fall 2022

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