N-isopropylacrylamide was polymerized on the surface of copper-plated carbon paper electrode by a novel redox initiation system composed of persulfate and copper nanoparticles, and the PNIPAAm−Cu NPs@CP film electrode was obtained. Cyclic voltammetry (CV) results showed that the electrode exhibits a reversible temperature, pH and glucose switchable electrical signal response through the ferrocene carboxylic acid (Fc(COOH)). With this basis, a 4-current output logic gate system consisting of 3-response inputs of temperature, pH, and glucose was fabricated and a corresponding logic circuit for 3-input/4-output ports was established. This work might provide a new avenue for the development of multi-valued biologic systems.

中文翻译：

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铜催化自由基聚合法构建刺激响应薄膜电极及其在多值生物系统中的应用

N-异丙基丙烯酰胺通过由过硫酸盐和铜纳米颗粒组成的新型氧化还原引发体系在镀铜碳纸电极表面聚合，得到PNIPAAm-Cu NPs@CP薄膜电极。循环伏安法 (CV) 结果表明，电极通过二茂铁羧酸 (Fc(COOH)) 表现出可逆的温度、pH 值和葡萄糖可切换的电信号响应。在此基础上，制作了由温度、pH、葡萄糖三响应输入组成的四电流输出逻辑门系统，并建立了相应的三输入四输出逻辑电路。这项工作可能为多值生物系统的开发提供新的途径。