Exciton Delocalization in a DNA-Templated Organic Semiconductor Dimer Assembly

Xiao Wang, Ruojie Sha, William B. Knowlton, Nadrian C. Seeman, James W. Canary, Bernard Yurke

Research output: Contribution to journalArticlepeer-review


A chiral dimer of an organic semiconductor was assembled from octaniline (octamer of polyaniline) conjugated to DNA. Facile reconfiguration between the monomer and dimer of octaniline-DNA was achieved. The geometry of the dimer and the exciton coupling between octaniline molecules in the assembly was studied both experimentally and theoretically. The octaniline dimer was readily switched between different electronic states by protonic doping and exhibited a Davydov splitting comparable to those previously reported for DNA-dye systems employing dyes with strong transition dipoles. This approach provides a possible platform for studying the fundamental properties of organic semiconductors with DNA-templated assemblies, which serve as candidates for artificial light-harvesting systems and excitonic devices.

Original languageEnglish (US)
Pages (from-to)1301-1307
Number of pages7
JournalACS nano
Issue number1
StatePublished - Jan 25 2022


  • DNA conjugation
  • circular dichroism
  • exciton delocalization
  • organic semiconductor
  • proton doping

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy


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