SERS-signal optimised AgNPs-plated-ZnO nanoflower-like structure synthesised for sensing applications

AgNPs-plated-ZnO nanoflower (NFs)-like structures (Ag@ZnO NFs) with optimised signals were synthesised via wet chemical method at different temperatures (50-80 degrees C). The enhancement factors (EFs) computed for the resultant Ag@ZnO ranged between 2.36-8.46x10(7) obtained at the different temperatures using 4-aminothiophenol (4-ATP). The achieved EF results indicate Ag@ZnO synthesised at 50 degrees C gave the best enhancement. It was therefore selected, characterised and used to fabricate a SERS-based nanosensor for the detection of 2,4-dichlorophenoxyacetic acid (2,4-D) with a limit of detection (LOD) of 2.87 x 10(-3) mu g/L. realised. (C) 2019 Elsevier B.V. All rights reserved.