基于聚多巴胺敏化的TiO2单晶光电信号放大策略的免疫传感分析

versatile photoelectrochemical immunoassay protocol based on the poly(dopamine)-sensitized titanium dioxide (TiO2) signal crystal with the support of ordered mesoporous carbon. was designed for quantitative monitoring the tumor markers. Poly(dopamine) was introduced to alter the optical properties of TiO2 signal crystal,enzyme-like biomimetic catalyst was exploited as the signal ampli?er to catalyze the hydroquinone. Herein, a competitive-type immunosensor was fabricated through the biomimetic catalyst labeled prostate speci?c antigen competing with the target antigen of different concentrations to react with the specific antibody anchored on the poly(dopamine)-sensitized TiO2 signal crystal, which provided a new photoelectrochemical consideration for tumor markers analysis.