Wearable Sweatband Sensor Platform Based on Gold Nanodendrite Array as Efficient Solid Contact of Ion-Selective Electrode,Analytical Chemistry

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Wearable Sweatband Sensor Platform Based on Gold Nanodendrite Array as Efficient Solid Contact of Ion-Selective Electrode
Analytical Chemistry ( IF 6.7 ) Pub Date : 2017-09-22 00:00:00 , DOI: 10.1021/acs.analchem.7b01560
Shuqi Wang ₁ , Yongjin Wu ₁ , Yang Gu ₁ , Tie Li ₁ , Hui Luo ₁ , Lian-Hui Li ₁ , Yuanyuan Bai ₁ , Lili Li ₁ , Lin Liu ₁ , Yudong Cao ₁ , Haiyan Ding ₁ , Ting Zhang ₁

Affiliation

As chemical sensors are in great demand for portable and wearable analytical applications, it is highly desirable to develop an all-solid-state ion-selective electrode (ISE) and reference electrode (RE) platform with simplicity and stability. Here we propose a wearable sensor platform with a new type of all-solid-state ISE based on a gold nanodendrite (AuND) array electrode as the solid contact and a poly(vinyl acetate)/inorganic salt (PVA/KCl) membrane-coated all-solid-state RE. A simple and controllable method was developed to fabricate the AuNDs on a microwell array patterned chip by one-step electrodeposition without additional processing. For the first time, the AuND electrodes with different real surface area and double layer capacitance were developed as solid contact of the Na⁺-ISE to investigate the relationship between performance of the ISE and surface area. As-prepared AuND-ISE with larger surface area (∼7.23 cm²) exhibited enhanced potential stability compared to those with smaller surface area (∼1.85 cm²) and to bare Au ISE. Important as the ISE, the PVA/KCl membrane-coated Ag/AgCl RE exhibited highly stable potential even after 3 months’ storage. Finally, a wearable sweatband sensor platform was developed for efficient sweat collection and real-time analysis of sweat sodium during indoor exercise. This all-solid-state ISE and RE integrated sensor platform provided a very simple and reliable way to construct diverse portable and wearable devices for healthcare, sports, clinical diagnosis, and environmental analysis applications.

中文翻译：

基于金纳米树突阵列作为离子选择电极的高效固相接触的可穿戴式导汗带传感器平台

由于化学传感器非常需要便携式和可穿戴分析应用，因此非常需要开发一种具有简单性和稳定性的全固态离子选择电极（ISE）和参比电极（RE）平台。在此，我们提出一种可穿戴式传感器平台，该平台具有一种新型的全固态ISE，该平台基于金纳米树枝晶（AuND）阵列电极作为固体触点，并具有聚醋酸乙烯酯/无机盐（PVA / KCl）膜涂层全固态稀土。开发了一种简单可控的方法，无需一步步进行电沉积即可通过一步电沉积在微孔阵列图案化芯片上制造AuND。首次开发了具有不同实际表面积和双层电容的AuND电极作为Na ^+的固体接触-ISE研究ISE性能与表面积之间的关系。与具有较小表面积（〜1.85cm ²）和裸Au ISE的那些相比，具有较大表面积（〜7.23cm ²）的制备的AuND-ISE表现出增强的电位稳定性。作为ISE重要的是，即使在储存3个月后，PVA / KCl膜包裹的Ag / AgCl RE仍显示出高度稳定的电位。最后，开发了一种可穿戴的汗带传感器平台，用于在室内运动过程中有效收集汗液并实时分析汗液中的钠。这种全固态ISE和RE集成传感器平台为构建用于医疗保健，体育，临床诊断和环境分析应用的各种便携式和可穿戴设备提供了一种非常简单可靠的方法。

更新日期：2017-09-23

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