Bifunctional photoelectrochemical aptasensor based on heterostructured Ag3PO4/Ag/TiO2 nanorod array for determination of two tumor markers

Mikrochim Acta. 2023 Feb 7;190(3):85. doi: 10.1007/s00604-023-05654-w.

Abstract

Constructing of heterostructures can significantly improve the photoelectrical (PEC) response signal by promoting the migration and suppressing the recombination of photogenerated carries. A bifunctional PEC sensing platform was designed for simultaneous high-performance detection of mucin-1 (MUC1) and carcinoembryonic antigen (CEA), which was based on generated Z-scheme heterostructured Ag3PO4/Ag/TiO2 nanorod arrays (NAs) and enzyme-mediated catalytic precipitation by alkaline phosphatase (ALP) and Au/hollow Co3O4 polyhedron. The proposed aptasensor displayed linear ranges of 1.0-100 ng mL-1 and 0.1-50 ng mL-1 for MUC1 and CEA with limit of detections of 0.430 and 0.058 ng mL-1, respectively. This strategy offers potential applications for early diagnosis, monitoring progression, and even evaluating the prognosis of breast cancer in practice.

Keywords: Biocatalytic precipitation; Nanozyme; Photoelectrochemical aptasensor; Signal amplification; Z-scheme heterostructure.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biomarkers, Tumor*
  • Carcinoembryonic Antigen
  • Electrochemical Techniques
  • Limit of Detection
  • Nanotubes* / chemistry
  • Silver / chemistry

Substances

  • Biomarkers, Tumor
  • Carcinoembryonic Antigen
  • titanium dioxide
  • silver phosphate
  • Silver