Plasmonic response of aptamer-functionalized gold nanoparticles via target-induced aggregation for oxytetracycline detection.
A plasmonic, interface-engineered colorimetric aptasensor based on aptamer-functionalized gold nanoparticles for the rapid, sensitive, and selective detection of OTC, demonstrating excellent selectivity against structurally related antibiotics and enabling rapid visual detection within 6-8 min.