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Highly Sensitive Non-Enzymatic Wireless Glucose Sensor Based on Ni-Co Oxide Nanoneedle-Anchored Polymer Dots
Journal of Industrial and Engineering Chemistry ( IF 5.9 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.jiec.2020.06.028
Hyeong Jun Jo , Arnab Shit , Hee Sauk Jhon , Sung Young Park

Abstract Polymer dot (PD)-bridged nickel cobalt oxide (NiCo2O4 (NCO)) nanoneedle-assembled globe-shaped clusters for high-performance glucose sensors were prepared via the consecutive calcination and packaging of PDs using the hydrothermal technique. The sp2-conjugated bridge of electrons, abundantly available catechol functionalized active sites offered by the PDs, and porous structure of NCO created effective electron transport routes for electrocatalytic reactions. The remarkable synergy between the conductive PDs and NCO conferred the PDs-bridged NCO (PDs-NCO) exceptional electrocatalytic activity for glucose detection. Under the optimal applied potential of +0.5 V, the developed PDs-NCO-coated Ni foam (NF) electrode presented the broad detection range from 5 μM to 0.25 mM, sensitivity of 806.17 μA mM−1 cm−2, detection limit of 2.75 μM, and exceptional selectivity. Furthermore, the PDs-NCO-coated NF electrode achieved the specific capacitance of 35.63 F g−1 at the current density of 0.5 A g−1 and superb cycling stability including the 96.7% specific capacitance retention over 5000 charge-discharge cycles. In addition, glucose-sensing could be easily monitored using a wireless sensor on a smartphone. The combination of NCO and PDs represents an innovative approach for constructing high-performance, reusable, non-enzymatic glucose sensors with low detection limit, high sensitivity, and excellent selectivity.

中文翻译:

基于镍钴氧化物纳米针锚定聚合物点的高灵敏度非酶无线葡萄糖传感器

摘要 通过使用水热技术对PDs进行连续煅烧和封装,制备了用于高性能葡萄糖传感器的聚合物点(PD)-桥接镍钴氧化物(NiCo2O4(NCO))纳米针组装的球形簇。电子的 sp2 共轭桥、PD 提供的大量可用的儿茶酚官能化活性位点以及 NCO 的多孔结构为电催化反应创造了有效的电子传输途径。导电PDs和NCO之间显着的协同作用赋予了PDs桥接的NCO(PDs-NCO)用于葡萄糖检测的优异电催化活性。在+0.5 V的最佳外加电位下,开发的PDs-NCO包覆的泡沫镍(NF)电极具有从5 μM到0.25 mM的宽检测范围,灵敏度为806.17 μA mM-1 cm-2,检测限为2.75微米,和卓越的选择性。此外,PDs-NCO 涂覆的 NF 电极在 0.5 A g-1 的电流密度下实现了 35.63 F g-1 的比电容和出色的循环稳定性,包括在 5000 次充放电循环中保持 96.7% 的比电容。此外,可以使用智能手机上的无线传感器轻松监测葡萄糖感应。NCO 和 PD 的结合代表了一种构建高性能、可重复使用、非酶促葡萄糖传感器的创新方法,具有低检测限、高灵敏度和出色的选择性。可以使用智能手机上的无线传感器轻松监测葡萄糖感应。NCO 和 PD 的结合代表了一种构建高性能、可重复使用、非酶促葡萄糖传感器的创新方法,具有低检测限、高灵敏度和出色的选择性。可以使用智能手机上的无线传感器轻松监测葡萄糖感应。NCO 和 PD 的结合代表了一种构建高性能、可重复使用、非酶促葡萄糖传感器的创新方法,具有低检测限、高灵敏度和出色的选择性。
更新日期:2020-09-01
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