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DNA-guided lattice remodeling of carbon nanotubes.

ABSTRACT: Covalent modification of carbon nanotubes is a promising strategy for engineering their electronic structures. However, keeping modification sites in registration with a nanotube lattice is challenging. We report a solution using DNA-directed, guanine (G)-specific cross-linking chemistry. Through DNA screening we identify a sequence, C₃GC₇GC₃, whose reaction with an (8,3) enantiomer yields minimum disorder-induced Raman mode intensities and photoluminescence Stokes shift, suggesting ordered defect array formation. Single-particle cryo-electron microscopy shows that the C₃GC₇GC₃ functionalized (8,3) has an ordered helical structure with a 6.5 angstroms periodicity. Reaction mechanism analysis suggests that the helical periodicity arises from an array of G-modified carbon-carbon bonds separated by a fixed distance along an armchair helical line. Our findings may be used to remodel nanotube lattices for novel electronic properties.

SUBMITTER: Lin Z

PROVIDER: S-EPMC9872717 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature

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DNA-guided lattice remodeling of carbon nanotubes.

Lin Zhiwei Z Beltran Leticia C LC De Los Santos Zeus A ZA Li Yinong Y Adel Tehseen T Fagan Jeffrey A JA Hight Walker Angela R AR Egelman Edward H EH Zheng Ming M

Science (New York, N.Y.) 20220728 6605

Covalent modification of carbon nanotubes is a promising strategy for engineering their electronic structures. However, keeping modification sites in registration with a nanotube lattice is challenging. We report a solution using DNA-directed, guanine (G)-specific cross-linking chemistry. Through DNA screening we identify a sequence, C3GC7GC3, whose reaction with an (8,3) enantiomer yields minimum disorder-induced Raman mode intensities and photoluminescence Stok ...[more]

PMID: 35901135

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