Supporting Information for
DNA
-
Mediated Electrochemistry of Disulfides on Graphite
Alon A. Gorodetsky and Jacqueline K.
Ba
rton
Department of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena,
California 91125
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Binding Energy (eV)
Coun
t
Supporting Figure 1: X-Ray phot
oelectron spectroscopy spectr
a of HOPG modified with
pyrene modified well matched duplex DNA. DNA with thiols in the sugar phosphate
backbone is shown in blue a
nd without thiols in the suga
r phosphate backbone is shown
in red.
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A.
B.
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Scan Rate (mV/s)
P
ea
k
C
urren
t
Supporting Figure 2: A: Cyclic voltammetry at
various scan rates of an electrode
modified with duplex DNA featuring a disulfid
e in the sugar phosphate. B: A plot of peak
current as a function of scan rate
for the reversible second wave.
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