Electrochemical oxidation of adenine using platinum electrodes modified with carbon nanotubes

被引：9

作者：

Pogacean, Florina ^{[1
]}

Biris, Alexandru R. ^{[1
]}

Coros, Maria ^{[1
]}

Watanabe, Fumiya ^{[2
]}

Biris, Alexandru S. ^{[2
]}

Clichici, Simona ^{[3
]}

Filip, Adriana ^{[3
]}

Pruneanu, Stela ^{[1
]}

机构：

[1] Natl Inst Res & Dev Isotop & Mol Technol, RO-400293 Cluj Napoca, Romania

[2] Univ Arkansas, Ctr Integrat Nanotechnol Sci, Little Rock, AR 72204 USA

[3] Univ Med & Pharm, Dept Physiol, Cluj Napoca, Romania

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2014年 / 59卷

关键词：

Carbon nanotube; Adenine oxidation; Electrochemical impedance spectroscopy; Modified electrode; AMPEROMETRIC DETECTION; RADIO-FREQUENCY; GUANINE; GRAPHENE; DNA; CATALYST; BASES;

D O I：

10.1016/j.physe.2014.01.016

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Single- (SWNTs), double- (DWNTs), and multi-walled (MWNTs) carbon nanotubes were synthesized by controlled Radio Frequency-catalytic Chemical Vapor Deposition (RF-cCVD). Their morphological and structural characteristics were identified using Transmission Electron Microscopy (TEM/HRTEM) and X-ray powder diffraction (XRD). Next, three platinum electrodes with identical amounts of each nanotube material (denoted Pt-SW, Pt-DW, and Pt-MW) were modified in order to test the electro-catalytic characteristics of the carbon nanotubes and further used for the electrochemical oxidation of adenine. The signal recorded with the Pt-SW electrode was very poor, due to the predominantly semiconducting properties of these nanotubes. In contrast, the signal recorded with Pt-DW or Pt-MW was well-defined, with the peak potentials at 1.07 and 1.01 V vs Ag/AgCl, respectively. In both cases, the detection limit (DL) for adenine was found to be 3 x 10(-6) M. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：181 / 185

页数：5

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