Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 19, Issue 21, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/19/21/215202
Keywords
-
Categories
Ask authors/readers for more resources
In an attempt to understand the complexities of DNA charge transport we have used a scanning tunnelling microscope break junction to repeatedly form a large number of Au-DNA-Au junctions. The DNA is covalently bound to the Au electrodes via gold-thiol bonds, and all measurements are carried out in an aqueous buffer solution to maintain a biological conformation of the duplex. A statistical analysis is carried out to determine the conductance of a single DNA duplex. Previously, we have seen an algebraic dependence of the conductance on length, suggesting a hopping mechanism. To attempt to verify this as the conduction mechanism we have changed the solution temperature and applied an electrochemical gate to the molecular junction to help elucidate the charge transport properties. In an alternating GC sequence with a length of eight base pairs, neither the temperature nor the gate potential caused a significant change in the conductance within the available experimental window.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available