Novel electrochemical aptasensor for ultrasensitive detection of sulfadimidine based on covalently linked multi-walled carbon nanotubes and in situ synthesized gold nanoparticle composites.
本研究开发了一种基于适配体(APT)的电化学生物传感策略,用于检测磺胺二甲嘧啶(SM2)。首先,裸金电极(AuE)通过自组装修饰2-氨基乙硫醇(2-AET),作为连接子用于固定多壁碳纳米管/金纳米粒子复合材料(MWCNTs/AuNPs);随后,巯基化APT通过硫-金亲和作用组装到电极表面。当样品中存在SM2时,APT与SM2特异性结...