Two birds with one stone: colorimetric and photothermal dual-mode biosensor based on CoOOH nanorings for detecting β-galactosidase activity and Escherichia coli

Abstract

Pathogenic bacterial infections are a serious global public health threats, creating an urgent requirement for the rapid, sensitive, and reliable detection of bacteria. Herein, a multi-colorimetric and portable photothermal dual-mode biosensor with cross-references and self-calibration was established for the analysis of β-galactosidase (β-Gal) and Escherichia coli (E. coli).