Carbon nanotube-modified electrodes for electrochemical DNA-sensors

被引：12
|
作者：
Abdullin, T. I.
Nikitina, I. I.
Ishmukhametova, D. G.
Budnikov, G. K.
Konovalova, O. A.
Salakhov, M. Kh.
机构：
[1] Kazan VI Lenin State Univ, Dept Biol & Soil Sci, Kazan 420008, Tatarstan, Russia
[2] Kazan VI Lenin State Univ, Butlerov Inst Chem, Kazan 420008, Tatarstan, Russia
[3] Kazan VI Lenin State Univ, Dept Phys, Kazan 420008, Tatarstan, Russia
来源：
JOURNAL OF ANALYTICAL CHEMISTRY | 2007年 / 62卷 / 06期
关键词：
D O I：
10.1134/S1061934807060184
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Glassy-carbon electrodes (GCEs) are modified with preoxidized multiwalled carbon nanotubes (CNTs). According to the data of atomic force microscopy, the layers of CNTs on GCEs possess a homogeneous nanostructurized surface. The voltammetric properties of a GCE/CNT depend on the modifier load. Guanine and deoxyguanosine monophosphate are strongly adsorbed on GCE/CNT and oxidized at +690 and +930 mV (pH 7.0), respectively. The oxidation current of guanine DNA nucleotides adsorbed on a GCE/CNT is significantly higher for the thermally denaturated biopolymer than for the native one. Our results are of interest for the development of sensors based on the electrochemical properties of nucleic acids.
引用
收藏
页码：599 / 603
页数：5
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