A novel label-free photoelectrochemical immunosensor based on CdSe quantum dots sensitized Ho/Yb-TiO for the detection of Vibrio parahaemolyticus.

A novel photoelectrochemical (PEC) immunosensor based on CdSe quantum dots (QDs) sensitized Ho/Yb-TiO for the detection of Vibrio parahaemolyticus (VP) was assembled. The working electrode was constructed via the layer-by-layer (LBL) method with the Ho/Yb-TiO, CdSe QDs, NHS/EDC, antibody of VP (anti-VP), bovine serum albumin (BSA) modified on the surface of the FTO in sequence. Ascorbic acid (AA) acts as an electron donor to combine photogenerated holes in order to provide a stable current system.