DNA-guided lattice remodeling of carbon nanotubes-Science July 2022

July 28, 2022 by hn6u@virginia.edu

Congratulations to the Egelman lab for their recent paper published in Science on Carbon Nanotubes.  You can read the entire article here:science.abo4628

“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.”

 

You can also view the press release here: https://www.science.org/doi/10.1126/science.abo4628