DNA-directed assembly of graphene homostructures
Abstract
We present a DNA-directed strategy for the programmable assembly of graphene homostructures, enabled by covalent DNA functionalization of azidated graphene nanosheets. Azidated graphene was synthesized via established electrochemical exfoliation methods and further refined by cascade centrifugation to control flake size and thickness. Complementary single-stranded DNA linkers were covalently attached to the graphene surface using copper-free click chemistry. Upon hybridization, DNA strands bridged individual graphene flakes into vertical and lateral junctions. Fluorescence recovery based on Cy5 labeling and dynamic light scattering confirmed successful DNA-guided assembly. The assembled structure configurations were investigated by atomic force microscopy and conductive AFM, highlighting the linking and insulating role of DNA tethered between flakes. This approach offers a modular platform for the construction of graphene–graphene architectures via biomolecular assembly.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (5)
Haosen Miao
Department of Chemistry, Queen Mary University of London , Mile End Road, London E1 4NS,
Kai Chen
Houlin Yu
Department of Chemistry, Queen Mary University of London , Mile End Road, London E1 4NS,
Mehamed Ali
Department of Chemistry, Queen Mary University of London , Mile End Road, London E1 4NS,
Matteo Palma
Department of Chemistry