Plasmon-Enhanced Fluorescent Nanoprobe for Ultrasensitive and Selective Detection of Nitroaniline Derivatives

Key Points

• The aim is to develop a sensitive and selective nanoprobe for detecting nitroaniline derivatives.
• Engineered a plasmon-enhanced fluorescent nanoprobe using water-soluble components.
• Employed Zn²⁺-directed assembly of silver nanoparticles and zinc–quinolate complexes.
• Utilized plasmonic coupling to amplify fluorescence emission.
• Achieved selective detection of 4-nitroaniline and 2,4-dinitroaniline at parts per billion (ppb) levels.
• Demonstrated enhanced fluorescence compared to conventional detection methods.