Evaluating diverse electrode surface patterns of 3D printed carbon thermoplastic electrochemical sensors
Evaluating diverse electrode surface patterns of 3D printed carbon thermoplastic electrochemical sensors
复制标题
评估 3D 打印碳热塑性电化学传感器的各种电极表面图案
DOI：
10.1039/d3an01592k
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发表时间：
2024
期刊：
影响因子：
--
通讯作者：
Miller C
中科院分区：
文献类型：
--
作者：
Miller C
电化学传感技术依赖于在电极表面发生的氧化还原反应。该表面的构造在电化学传感器的发展中是极其重要的。包括3D打印在内的大多数先前的电极制造方法都生产出具有平坦表面的电极。3D打印具有独特的潜力来创建复杂和独特的电极表面形状。在拟议的工作中，制作了具有九种不同表面形态的3D打印炭黑聚乳酸电极。将这些与平坦表面电极进行比较。为了评估电极的性能，在三种不同的氧化还原探针（二茂铁甲醇、铁氰化物和多巴胺）中进行测量。我们的研究结果强调，当电极的几何表面积归一化时，电极表面的表面图案可以影响观察到的电流和电子转移动力学。电极表面上具有圆顶和旗形图案的电极显示出最高的氧化电流，并且阳极和阴极峰值电流（ΔE）之间的差值较低。然而，具有环的设计具有较低的电流值和较高的ΔE值。这些差异很可能是由于不同图案化设计的不同表面粗糙度导致的电极表面上导电位点的可及性的变化。我们的研究结果强调，当使用3D打印制作电极时，电极表面的表面图案化可以用作提高传感器性能的有效方法，以适应不同的应用。
Electrochemical sensing techniques rely on redox reactions taking place at the electrode surface. The configuration of this surface is of the utmost importance in the advancement of electrochemical sensors. The majority of previous electrode manufacturing methods, including 3D printing have produced electrodes with flat surfaces. There is a distinct potential for 3D printing to create intricate and distinctive electrode surface shapes. In the proposed work, 3D printed carbon black polylactic acid electrodes with nine different surface morphologies were made. These were compared to a flat surface electrode. To evaluate the performance of the electrodes, measurements were conducted in three different redox probes (ferrocene methanol, ferricyanide, and dopamine). Our findings highlighted that when electrodes were normalised for the geometric surface area of the electrode, the surface pattern of the electrode surface can impact the observed current and electron transfer kinetics. Electrodes that had a dome and flag pattern on the electrode surface showed the highest oxidation currents and had lower values for the difference between the anodic and cathodic peak current (ΔE). However, designs with rings had lower current values and higher ΔE values. These differences are most likely due to variations in the accessibility of conductive sites on the electrode surface due to the varying surface roughness of different patterned designs. Our findings highlight that when making electrodes using 3D printing, surface patterning of the electrode surface can be used as an effective approach to enhance the performance of the sensor for varying applications.