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Carbon nanotube band electrodes for electrochemical sensors
Electrochemistry Communications ( IF 5.4 ) Pub Date : 2017-12-06 , DOI: 10.1016/j.elecom.2017.11.023
Rongzhou Lin , Tuti Mariana Lim , Tuan Tran

Utilization of carbon nanotubes (CNTs) in fabrication of electrodes for electrochemical detection often faces a conflicting goal: achieving both high response current and high mass transfer coefficient. Typically, electrodes made in a form of CNT ensembles offer high response current as a result of the large number of CNTs. However, these electrodes have substantially low mass transfer coefficients due to overlapping of diffusion fields between neighboring CNTs. To resolve this conflict, we design band electrodes made of vertically-aligned CNT (CNBEs), which are macro-sized in length and submicro-sized in width. We show that the distinct dimensions of the CNBEs allow both high response currents and mass transfer coefficients. We also demonstrate that CNBEs offer excellent detection performances including wide linear range, high sensitivity, and low limit of detection in channel flow voltammetry.



中文翻译:

用于电化学传感器的碳纳米管带状电极

在制造用于电化学检测的电极时使用碳纳米管(CNT)常常面临一个冲突的目标:既要实现高响应电流又要实现高传质系数。典型地,由于大量的CNT,以CNT集合体形式制成的电极提供高响应电流。然而,由于相邻CNT之间的扩散场的重叠,这些电极具有基本上低的传质系数。为解决此冲突,我们设计了由垂直排列的CNT(CNBE)制成的带状电极,其长度为宏观尺寸,宽度为亚微米尺寸。我们表明,CNBE的不同尺寸允许高响应电流和传质系数。我们还证明了CNBE具有出色的检测性能,包括宽线性范围,高灵敏度,

更新日期:2017-12-06
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