Fig. 5From: A Simple Laser Ablation-Assisted Method for Fabrication of Superhydrophobic SERS Substrate on Teflon Filma The diagrammatic sketch of detecting substance on the engraved PTFE. b SERS spectra of MB molecules with the same concentration (1 × 10−9 M) was obtained on original PTFE and engraved PTFE respectively. c, d, and e SERS spectra of MB molecules, R6G molecules, and BSA with various concentration respectivelyBack to article page