A novel photoelectrochemical sensor based on SiNWs@PDA for efficient detection of myocardial infarction.

Based on the necessity and urgency of cardiac troponin I (cTnI) detection for the diagnosis of myocardial infarction, a novel unlabeled photoelectrochemical (PEC) immunosensor has been developed to detect cTnI rapidly and sensitively. Silicon nanowire arrays (SiNWs) were prepared metal-assisted chemical etching. To improve the stability and sensitivity towards cTnI sensing, the surface of silicon nanowire arrays were coated with polydopamine by an growth method.