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Rapid Nanoprobe Signal Enhancement by In Situ Gold Nanoparticle Synthesis
Published on: March 7, 2018
A plasmon-enhanced fluorescent nanoprobe for ultrasensitive and selective detection of nitroaniline derivatives
Farhin Akhtar1, Santanu Dolai2, Sabyasachi Pramanik1
1Department of Engineering Sciences, Rajiv Gandhi Institute of Petroleum Technology Sivasagar Campus, Sivasagar, Assam-785697, India. spramanik@rgipt.ac.in.
Abstract:
A water-soluble, plasmon-enhanced fluorescent nanoprobe is engineered through Zn2+-directed assembly of HQS-capped silver nanoparticles and zinc quinolate complexes. Plasmonic coupling amplifies emission, enabling selective ppb-level detection of 4-nitroaniline and 2,4-dinitroaniline via NH2 → Zn2+ coordination-induced static quenching, delivering excellent sensitivity in real water matrices with high selectivity, sensitivity, and environmental applicability.
