Fig. 3From: Quantitative Analysis of Single and Mix Food Antiseptics Basing on SERS Spectra with PLSR Method a Ag NR array on wafer after immersed in 10 mM HCl; b SEM morphology of Ag NR array after immersion in 10 mM HCl; c SEM morphology of the HfO2 ultrathin film-coated Ag NRs after immersion in 10 mM HCl; d Raman spectra of 1 × 10−5 M 4-Mba adsorbed on as-deposited and 10 mM HCl immersed HfO2 ultrathin film-coated Ag NR SERS substratesBack to article page