Can the mechanical activation (polishing) of screen-printed electrodes enhance their electroanalytical response?
Can the mechanical activation (polishing) of screen-printed electrodes enhance their electroanalytical response?
复制标题
DOI：
10.1039/c6an00167j
复制
发表时间：
2016-01-01
期刊：
影响因子：
4.2
通讯作者：
Banks, Craig E.
中科院分区：
文献类型：
--
作者：
Cumba, Loanda R.;Foster, Christopher W.;Banks, Craig E.
丝网印刷电极（SPE）的机械活化（抛光）进行了探索，并显示出改善的伏安响应（在特定情况下）时，无论是常用的氧化铝浆料或金刚石喷雾抛光。证明的概念证明的电化学传感亚硝酸盐的伏安电流的增加被发现使用两个抛光协议，表现出改进的检测限（3西格玛）和电分析灵敏度的两倍增加相比，相应的未抛光的对应物。据发现，机械活化/抛光增加的C/O比显着影响内球电化学探针（而外球系统保持不受影响）。机械活化/抛光有可能是一个简单的预处理技术，可以扩展和常规应用于其他分析物的电分析响应的可观察到的改善。
The mechanical activation (polishing) of screen-printed electrodes (SPEs) is explored and shown to exhibit an improved voltammetric response (in specific cases) when polished with either commonly available alumina slurry or diamond spray. Proof-of-concept is demonstrated for the electrochemical sensing of nitrite where an increase in the voltammetric current is found using both polishing protocols, exhibiting an improved limit of detection (3 sigma) and a two-fold increase in the electroanalytical sensitivity compared to the respective un-polished counterpart. It is found that mechanical activation/polishing increases the C/O ratio which significantly affects inner-sphere electrochemical probes only (whereas outer-sphere systems remain unaffected). Mechanical activation/polishing has the potential to be a simple pre-treatment technique that can be extended and routinely applied towards other analytes for an observable improvement in the electroanalytical response.