Highly active Au NP microarray films for direct SERS detection

Abstract

In this study, we demonstrated a flexible transparent three-dimensional (3D) ordered micro-hemisphere (MHS) array PDMS film with self-assembled Au nanoparticles (NPs) (an Au NP-MHS array film) as a surface-enhanced Raman scattering (SERS) platform for the <italic>in situ</italic> detection of pesticides in food.