Figure 3From: Gold nanoparticle thin films fabricated by electrophoretic deposition method for highly sensitive SERS applicationComparison of top-view FESEM images of the three samples: (a) S3, (b) S2, (c) S1. (d) High-resolution FESEM image of sample S1. The positions (red circles) indicate that sub-10-nm gaps have been formed between the neighboring particles on this film.Back to article page