Research Article
TLC-SERS Plates with a Built-In SERS Layer Consisting of Cap-Shaped Noble Metal Nanoparticles Intended for Environmental Monitoring and Food Safety Assurance
Figure 7
The effect of PVP protection of silver nanoparticles on 912 cm−1 peak intensities from malachite green. 1 (a) and 2 (a) are without PVP protection, before and after application of the separation gel layer, respectively. 1 (b) and 2 (b) show signals from PVP-protected silver nanoparticles.