Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science (Ministry of Education), College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
Shandong Provincial Key Laboratory of Biochemical Engineering, College of Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
Talanta. 2025 Jan 1;282:127048. doi: 10.1016/j.talanta.2024.127048. Epub 2024 Oct 16.
Herein, we report a fast (10 min) and simple surface treatment of pure carbon cloth (CC) only by an air plasma. The structural characterizations indicate that the air plasma process brings out higher rugosity, more defects, and increased oxygen-related groups on CC surfaces than Ar- or N-plasma, which can offer abundant capture sites, large electroactive area, and superhydrophilic interface for analytes. As a result, the air-treated CC (CC-P) electrode achieves a pronounced improvement of electrocatalytic activity for the [Fe(CN)]/[Fe(CN)] probe evidenced by increased peak currents, decreased peak-to-peak separation, and the lowered resistance of charge transfer. It is also demonstrated that the self-supported CC-P electrode possesses excellent sensing performance toward dopamine (DA) and uric acid (UA). The feasibility of the simultaneous electrochemical detection of DA and UA can be verified by their large peak potential gap (∼112 mV) for differential pulse voltammetry. The chronoamperometric sensor yields wide linear ranges of 0.05-100 μM for DA and 0.5-300 μM for UA. The corresponding detection limits are estimated to be 2.6 and 20.4 nM for DA and UA, respectively. The sensor also displays satisfactory selectivity, stability, and reproducibility. Due to good flexibility, the CC-P electrode presents great potential for manufacturing wearable and soft electronics for human health monitoring.
在此，我们仅通过空气等离子体快速（10 分钟）且简单地处理纯碳布（CC）。结构表征表明，与 Ar 或 N 等离子体相比，空气等离子体处理在 CC 表面带来了更高的粗糙度、更多的缺陷和更多的含氧基团，可为分析物提供丰富的捕获位点、更大的电活性面积和超亲水界面。结果，处理后的 CC（CC-P）电极对 [Fe(CN)]/[Fe(CN)]探针表现出明显改善的电催化活性，表现为峰电流增加、峰-峰分离减小以及电荷转移电阻降低。还证明了自支撑 CC-P 电极对多巴胺（DA）和尿酸（UA）具有出色的传感性能。通过差分脉冲伏安法，其大的峰电位差（约 112 mV）可以验证 DA 和 UA 的同时电化学检测的可行性。计时安培传感器对 DA 的线性范围为 0.05-100 μM，对 UA 的线性范围为 0.5-300 μM。相应的检测限分别估计为 2.6 和 20.4 nM 用于 DA 和 UA。该传感器还表现出良好的选择性、稳定性和重现性。由于良好的柔韧性，CC-P 电极在制造用于人体健康监测的可穿戴和软电子产品方面具有很大的潜力。
