The development of an ultra-sensitive electrochemical immunosensor using a PPyr-NHS functionalized disposable ITO sheet for the detection of interleukin 6 in real human serums
作者:Elif Burcu Aydın、Muhammet Aydın、Mustafa Kemal Sezgintürk
DOI:10.1039/d0nj03183f
日期:——
A label-free impedimetric immunosensor based on a conjugated poly(pyrrole N-hydroxy succinimide) (PPyr-NHS) polymer covered disposable indium tin oxide electrode (ITO) was fabricated for the ultrasensitive determination of interleukin 6 (IL 6) antigen. In this sensing platform, the PPyr-NHS polymer, which carried a number of succinimide groups on its end side, was used as a matrix material for the
基于共轭聚吡咯N的无标记阻抗免疫传感器制备了覆盖有羟基的琥珀酰亚胺(PPyr-NHS)聚合物的一次性铟锡氧化物电极(ITO),用于超灵敏地测定白介素6(IL 6)抗原。在该传感平台中,首次在其端侧带有多个琥珀酰亚胺基团的PPyr-NHS聚合物用作基质材料。该合成的聚合物具有优异的生物相容性和良好的导电性。另外,利用该材料作为基质材料可直接固定用作生物识别元件的IL 6受体(IL6R)。通过电化学阻抗谱(EIS)和循环伏安法(CV)技术确认了工作电极的制备,IL 6R的成功附着以及IL6R和IL 6抗原之间的特异性相互作用。此外,在构造过程中,通过扫描电子显微镜(SEM),原子力显微镜(AFM),傅立叶变换红外光谱(FTIR)和拉曼光谱对工作电极表面进行了表征。采用阻抗分析法定量IL 6抗原。在优化的实验条件下,设计的传感平台可以检测到范围从0.03 pg mL的IL 6抗原-1至22.5 pg