Wang Zheng, Zhu Jiayuan, Shen Ying-Zhuo, Ma Cheng, Li Hongbo, Liu Wei, Hu Xiao-Ya, Xu Qin
Institute of Innovation Materials and Energy, School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.
School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China.
Mikrochim Acta. 2025 Sep 11;192(10):659. doi: 10.1007/s00604-025-07503-4.
A novel all-solid-state flexible electrochromic sensor without liquid electrolytes and external power sources is reported which simplifies device construction and instrumentation requirement and offers high stability and energy efficiency. A polyacrylamide hydrogel was used as the solid electrolyte, and prussian blue (PB) on one end of a flexible bipolar electrode (BPE) served as the electrochromic region. Molecularly imprinted polymers (MIPs) modified on the other pole of the BPE, as electron injection regions, recognized targets and formed a sandwich structure with the aptamer functionalized light-responsive zirconium-based metal-organic frameworks (UiO-66) coated TiO (Apt-UiO-66@TiO) quantitatively. Under ultraviolet light-irradiation, the captured TiO@UiO-66 triggered potential differences between the two poles of the BPE, causing the discoloration of PB. The degree of PB color change correlated with the concentration of bisphenol A (BPA) in the range 1.0 × 10 to 1.0 × 10 M. BPA could be quantified via the intelligent RGB analysis, and the limit of detection reaches 5.96 × 10 M. The sensor has been applied to the assay of BPA in bottled water samples with satisfactory results. This all-solid-state flexible sensor can be integrated into flexible devices with enhanced portability for field applications.
报道了一种新型的无液体电解质和外部电源的全固态柔性电致变色传感器，该传感器简化了设备结构和仪器要求，并具有高稳定性和能源效率。使用聚丙烯酰胺水凝胶作为固体电解质，柔性双极电极（BPE）一端的普鲁士蓝（PB）用作电致变色区域。在BPE另一极上修饰的分子印迹聚合物（MIPs）作为电子注入区域，识别目标并与定量包被有适体功能化光响应锆基金属有机框架（UiO-66）的TiO（Apt-UiO-66@TiO）形成三明治结构。在紫外光照射下，捕获的TiO@UiO-66引发BPE两极之间的电位差，导致PB变色。PB颜色变化程度与双酚A（BPA）浓度在1.0×10至1.0×10 M范围内相关。BPA可通过智能RGB分析进行定量，检测限达到5.96×10 M。该传感器已应用于瓶装水样品中BPA的检测，结果令人满意。这种全固态柔性传感器可集成到柔性设备中，增强现场应用的便携性。
