Donato M Ceres

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In situ scanning tunneling microscopy has been performed on DNA-modified gold surfaces under physiological conditions. The STM images of DNA-modified gold surfaces are strongly dependent on the applied potential and percentage of DNA duplexes containing a single base mismatch. At negative surface potentials we observe reproducible features that are(More)
Ionic permselectivity of DNA films has been investigated by the analysis of the electrochemical response of methylene blue (MB) as a function of pH and ionic strength on DNA-modified electrodes in aqueous p-nitrophenol (p-NP) and phosphate buffers. We have observed a linear Pourbaix diagram in p-NP buffer indicating that the reduction of MB occurs with a(More)
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