Smart (Nano) materials:: TiO2 nanostructured films to modify electrodes for assembling of new electrochemical probes

被引:51
作者
Curulli, A
Valentini, E
Padeletti, G
Viticoli, A
Caschera, D
Palleschi, G
机构
[1] ISMN, Inst Nanostruct Mat, CNR, Div 2, I-00161 Rome, Italy
[2] Univ Roma Tor Vergata, Dept Chem, I-00133 Rome, Italy
[3] CNR, Div Montelibretti, ISMN, Inst Nanostruct Mat, I-00016 Monterotondo, Italy
关键词
TiO2 nanostructured films; modified electrodes; heterogeneous electron-transfer rate constant; K degrees(app); electrochemical probes;
D O I
10.1016/j.snb.2005.03.044
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Smart (Nano) materials with biosensing functions posses enormous potential in the development of new generation stable biosensors, chemical sensors, and actuators. Recently, there is a considerable interest in using TiO2 nanostructured materials as a film-forming material since they have high surface area, optical transparency, high bio-compatibility, and relatively good conductivity. In this work, TiO2 oxides were used as nanoporous electrodes to study the electron transfer mechanisms of H2O2 and many interesting biological molecules, as 3,4-dihydroxyphenylacetic acid (DOPAC), ascorbic acid, guanine, L-tyrosine, acetaminophen, and beta-NADH, in order to assemble a new generation of chemical sensors and biosensors. A kinetic study was also reported in this paper, which demonstrated high performances towards electrocatalytic processes, obtained at nanostructured TiO2-modified electrodes. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:441 / 449
页数:9
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