Electrochemical behavior of gold electrodes modified with photosensitizer-tethered DNA.
We investigated electrochemical characteristics of gold electrodes modified with photosensitizer-tethered DNA. We synthesized 3'-thiol-modified DNA strands (ODN-SH) and 3'-anthraquinone-modified DNA strands (AQ-ODN). We prepared an AQ-ODN/ODN-SH duplex-modified electrode through hybridization of AQ-ODN with ODN-SH on the gold electrode. We used an amperometric technique for its photocurrent measurement. The large photocurrent was observed by irradiation of a DNA modified electrode at 365 nm. We also measured photocurrent with different DNA sequences on gold electrodes.
Okamoto
Akimitsu
A
Department of Synthetic Chemistry and Biological Chemistry, Faculty of Engineering, Kyoto University, Kyoto 606-8501, Japan.
Kamei
Taku
T
Tanaka
Kazuo
K
Saito
Isao
I
D004247:DNA / Q000737:chemistry* / Q000528:radiation effects; D004563:Electrochemistry; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D008027:Light; D009692:Nucleic Acid Heteroduplexes / Q000528:radiation effects; D017319:Photosensitizing Agents / Q000737:chemistry*
D009692:Nucleic Acid Heteroduplexes; D017319:Photosensitizing Agents; D006046:Gold; D004247:DNA