ArticleJournal of the American Chemical Society2026
DNA Assembly Templated by Chiral Nanotube Lattices: From Helix to Rings.
Article in Journal of the American Chemical Society, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
Controlled assembly of DNA expands its utility in materials science. Most DNA-based architectures rely on Watson-Crick base pairing and stacking. Identifying additional programmable interactions could widen the design space. Single-stranded DNA (ssDNA) is known to adsorb on carbon nanotubes (CNTs) as sequence- and chirality-dependent helices, but direct structural evidence for a nanotube lattice-templating mechanism has been limited. Here we use cryo-electron microscopy to compare the assembly of the ssDNA sequence TTA TAT TAT ATT (ss65) on enantiomeric (6,5) CNTs. On the left-handed (+) (6,5) CNT, ss65 forms stacked, ring-like wraps with an axial repeat of 15.3 Å and with micrometer-scale coherence length. In contrast, on the right-handed (-) (6,5) CNT, ss65 adopts a conventional 1-start helical wrap with a helical pitch of ∼16.4 Å. These results indicate that the handedness of the underlying chiral lattice can bias ssDNA into distinct topologies (helix versus rings) and suggest a strategy for DNA assembly based on CNT lattice recognition, in addition to base pairing and stacking.
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