Probing the effects of conjugation path on the electronic transmission through single molecules using scanning tunneling microscopy.
A systematic study of the relationship between the molecular structure of a series of thiol end-capped oligo-phenylenevinylenes (OPVs) and the coherent electronic transmission at the single molecule level was measured by scanning tunneling microscopy (STM). This reveals a significant change in the electronic transparency of various OPV derivatives due to the insertion of a methylene spacer group or due to nitro group substitution. Apparently, changes in the conjugation path through the central benzene ring from para to meta substitution does not have a profound effect on the electronic transparency of the molecules.
Moth-Poulsen
Kasper
K
Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark.
Patrone
Lionel
L
Stuhr-Hansen
Nicolai
N
Christensen
Jørn B
JB
Bourgoin
Jean-Philippe
JP
Bjørnholm
Thomas
T