Carbon nanotube fiber microelectrodes show a higher resistance to dopamine fouling.
Carbon nanotube fiber microelectrodes show a higher resistance to dopamine fouling.
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DOI：
10.1021/ac401399s
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发表时间：
2013-08-06
影响因子：
7.4
通讯作者：
Safina, Gulnara
中科院分区：
文献类型：
--
作者：
Harreither, Wolfgang;Trouillon, Raphael;Poulin, Philippe;Neri, Wilfrid;Ewing, Andrew G.;Safina, Gulnara
我们比较了碳纳米管纤维（CNTF）微电极和传统碳纤维（CF）微电极的性能和抗DA污染性。这两种材料表现出相当的外球和内球氧化还原反应的电化学活性。虽然CNTF可能具有更高的固有RC常数，从而限制了其高频行为，但CNTF在电极稳定性方面显示出比CF显著更高的耐久性。在100 μM DA的恒定氧化过程中，CNTF微电极测得的信号显示了一个2小时的窗口，在此窗口内没有观察到电流下降。在相同条件下，在CF微电极处获得的电流降低了近50%。的污垢过程的模型，假设形成的表面上的绝缘体不断增长的补丁，已被比较的数据。这个模型被发现与我们的结果非常一致，并表明在0.1 - 2 nm s-1范围内的补丁的增长率。
We have compared the properties and resistance to DA fouling of a carbon nanotube fiber (CNTF) microelectrode to a traditional carbon fiber (CF) microelectrode. These two materials show comparable electrochemical activities for outer-sphere and inner-sphere redox reactions. Although the CNTF might have a higher intrinsic RC constant, thus limiting its high-frequency behavior, the CNTF show a significantly higher durability than the CF in terms of electrode stability. During constant oxidation of 100 μM DA, the signal measured by the CNTF microelectrode shows a 2-hour window over which no decrease in current is observed. Under the same conditions, the current obtained at the CF microelectrode decreases by almost 50 %. A model of the fouling process, assuming the formation of growing patches of insulator on the surface, has been compared to the data. This model is found to be in good agreement with our results, and indicates a growth rate of the patches in the 0.1 - 2 nm s−1 range.
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DOI：
10.1039/b807563h
发表时间：
2009-01
期刊：
The Analyst
影响因子：
--
作者：
Huffman ML;Venton BJ
通讯作者：
Venton BJ
影响因子：
3
作者：
KAWAGOE, KT;ZIMMERMAN, JB;WIGHTMAN, RM
通讯作者：
WIGHTMAN, RM
影响因子：
4.2
作者：
Heien, MLAV;Phillips, PEM;Wightman, RM
通讯作者：
Wightman, RM
影响因子：
5.4
作者：
Musameh, M;Wang, J;Lin, YH
通讯作者：
Lin, YH
影响因子：
15
作者：
DuVall, SH;McCreery, RL
通讯作者：
McCreery, RL