Book of Abstracts: Albany 2011

category image Albany 2011
Conversation 17
June 14-18 2011
©Adenine Press (2010)

Multi-Step Energy Transfer as a Communication Tool in Nanoscale DNA Assemblies

Bioinspired nanoscale technology requires new means to transfer information and driving forces for reaction of relevant distances. One possible solution can be to use excitation energy transfer in multiple steps to bridge large distances with high precision. This resembles the light harvesting complexes of photosynthetic organisms where absorbed energy is transported in multiple steps to the reaction center. We have created photonic systems based on multistep energy transfer capable of transferring excitation energy over long ranges with high specificity. Here, we present a self-assembled DNA-based photonic wire where excitation energy is transported over more than 20 nm (1). The wire utilizes the interlcalator YO-PRO to mediate end-to-end energy transfer in the photonic wire. We also introduce a photonic network with selectable outputs incorporated in a self-assembled DNA nano-construct. Though the binding of YO-PRO it is possible to direct energy transfer from one output dye to the other. Our work show how self-assembled structures of DNA and fluorophores can function as a basis for communication on the nanometer scale.

Jonas K. Hannestad
Bo Albinsson

Department of Chemical and Biological Engineering/Physical Chemistry Chalmers University of Technology SE-41296 Gothenburg, Sweden

ph: +46(0)31-772 30 46


Figure. Self-assembled DNA-based photonic wire. End-to-end energy transfer is facilitated by the meditative effect of YO-PRO.

  • J. K. Hannestad, P. Sandin, B. Albinsson, J. Am. Chem. Soc. 130 15889 (2008).