Since the development of potentiometric ion-selective electrodes, remarkable steps have been taken towards progressive simplification and improved robustness of pH sensing probes. In particular, the design of compact sensing architectures using solid-state components holds great potential for portable and wearable applications. Here we report the development of an electrochemically gated device for pH detection, combining the robustness of potentiometric-like transduction with an extremely simple and integrated geometry requiring no reference. The sensor is a two-point probe device comprising two thin polymeric films, i.e. a charge transport layer and a pH-sensitive layer, and exhibits a sensitivity of (8.3 ± 0.2) × 10⁻³ pH unit⁻¹ in the pH range from 2 to 7. Thanks to the versatility and robustness of the optimised design, a textile pH sensor was fabricated whose performance is comparable with that of glass sensors.

自从电位离子选择电极的发展以来，已采取了显着的步骤来逐步简化pH传感探针并提高其耐用性。特别是，使用固态组件的紧凑型传感架构的设计在便携式和可穿戴应用中具有巨大的潜力。在这里，我们报告了一种用于pH检测的电化学门控设备的开发，该设备将电位计式转导的鲁棒性与极其简单且集成的几何形状结合在一起，无需参考。该传感器是一种两点探针装置，包括两个薄的聚合物膜，即电荷传输层和pH敏感层，其灵敏度为（8.3±0.2）×10 ^-3 pH单位^-1 pH值范围从2到7。得益于优化设计的多功能性和耐用性，制造出了一种织物pH传感器，其性能可与玻璃传感器媲美。