On the microelectrode behaviour of graphite-epoxy composite electrodes
On the microelectrode behaviour of graphite-epoxy composite electrodes
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DOI：
10.1016/s1388-2481(02)00265-5
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发表时间：
2002-03-01
影响因子：
5.4
通讯作者：
Willows, A
中科院分区：
文献类型：
--
作者：
O'Hare, D;Macpherson, JV;Willows, A
由嵌入绝缘粘合剂中的导电颗粒形成的电极显示出与微电极阵列通常相关的一些性质，即电流与对流和S形电流-电压曲线的独立性。我们系统地研究了一系列复合材料配方的电化学行为。的表面积，是导电和导电功能的大小的分数已被量化使用的新技术进行原子力显微镜（C-AFM）。我们已经表明，流动灵敏度和伏安行为与C-AFM的结果。更稀的制剂表现得像微电极阵列，尽管表现出大的时间常数。这种行为的起源进行了讨论。(C)2002 Elsevier Science B. V.保留所有权利。
Electrodes fashioned from conducting particles embedded in insulating binder show some properties commonly associated with arrays of microelectrodes, viz. independence of current from convective flow and sigmoidal current voltage curves. We have systematically investigated the electrochemical behaviour of a range of composite formulations. The fraction of the surface area that is conducting and the size of the conducting features have been quantified using the novel technique of conducting atomic force microscopy (C-AFM). We have shown that flow sensitivity and voltammetric behaviour are correlated with results from the C-AFM. The more dilute formulations behave like arrays of microelectrodes, though exhibiting large time constants. The origin of this behaviour is discussed. (C) 2002 Elsevier Science B.V. All rights reserved.