A colorimetric and ratiometric fluorescence dual-mode biosensor based on Pt–Ni bimetallic nanozymes for the detection of ofloxacin drug residues

Key Points

• The biosensor demonstrates high sensitivity for detecting ofloxacin residues, aiding drug residue monitoring.
• It operates using colorimetric and fluorescence signals to enhance detection accuracy.
• Utilizing platinum-nickel bimetallic nanozymes, the system improves responsiveness and performance.
• This technology supports environmental safety by enabling efficient detection of pharmaceutical contaminants.