This invention relates to the field of nanobiosensing technology, and particularly to a method for preparing a multifunctional nanozyme probe and its application in
tuberculosis and HIV comorbidities. The nanozyme probe comprises a
covalent organic framework (COF) material as a carrier substrate, and first and second
noble metal nanoparticles loaded on the surface of the carrier substrate. The first
noble metal nanoparticles enhance the Raman
signal of the carrier substrate, and the second
noble metal nanoparticles provide
enzyme activity. This nanozyme probe possesses excellent colorimetric response performance,
peroxidase-like activity, and strong SERS performance, making it suitable as a multifunctional
signal probe. When applied to bidirectional lateral flow immunochromatography (LFIA), by modifying it with specific antibodies against
tuberculosis and HIV biomarkers, simultaneous and bidirectional detection of TB and HIV biomarkers can be achieved. This test strip supports three detection
modes: visual
colorimetry, catalytic amplification
colorimetry, and precise SERS quantification, improving the sensitivity,
dynamic range, and reliability of the detection.