Preparation of SiO2@ Au nanorod array as novel surface enhanced Raman substrate for trace pollutants detection*
Hou Meng-Jinga), Zhang Xiana), Cui Xiao-Yanga), Liu Cana), Li Zheng-Caob), Zhang Zheng-Junb)†
       
(a) Raman spectras of 10−6 M R6G adsorbed on the SERS substrates whose Au depositing times are 30 s, 60 s, 90 s, 120 s, 150 s, and 180 s respectively. (b) Intensity of 612 cm−1 peak in the Raman spectrums in Fig. (a).