Fig. 3From: Pinhole Effect on the Melting Behavior of Ag@Al2O3 SERS SubstratesSEM images of Ag@Al2O3/2, Ag@Al2O3/5, Ag@Al2O3/20, Ag@Al2O3/40, Ag@Al2O3/80, and Ag@Al2O3/100 after heating at 350 °C.Back to article page