Herein, Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/reduced graphene oxide (rGO) (PEDOT:PSS/rGO) composite was prepared and further functionalized with L-Cysteine (LC) to manifest sensitive and selective detection of copper (Cu²⁺) and lead (Pb²⁺) ions using Field Effect Transistor (FET) in the concentration range of 1-60 µg/L. The sensor (PEDOT:PSS/rGO/L-Cysteine) exhibits low-voltage operations, highly sensitive and selective towards target metal ions (Cu²⁺ and Pb²⁺). The lower detection limits for Cu²⁺ and Pb²⁺ were found to be 0.33 µg/L and 2.36 µg/L, which is well below the World Health Organization WHO recommendations (2 mg/L (2 ppm) for Cu²⁺ ions and 10 µg/L (10 ppb) for Pb²⁺ ions.

在此，制备了聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）/还原氧化石墨烯（rGO）（PEDOT：PSS / rGO）复合材料，并用L-半胱氨酸（LC）进一步官能化以显示敏感并使用场效应晶体管（FET）在1-60 µg / L的浓度范围内选择性检测铜（Cu ²⁺）和铅（Pb ²⁺）离子。传感器（PEDOT：PSS / rGO / L-Cysteine）具有低电压操作，对目标金属离子（Cu ²⁺和Pb ²⁺）具有高度的敏感性和选择性。发现Cu ²⁺和Pb ²⁺的最低检测限为0.33 µg / L和2.36 µg / L，远低于世界卫生组织的WHO建议（Cu的2 mg / L（2 ppm））²⁺离子和10μg/ L（10 ppb）的Pb ²⁺离子。