Acta Optica Sinica, Volume. 41, Issue 16, 1624001(2021)
Fabrication and Surface-Enhanced Raman Spectroscopy Performance of Three-Dimensional Cu(OH)2-Ag Substrate
Fig. 2. Characterization of Cu(OH)2-Ag substrate. (a) TEM image of Ag NPs; (b) SEM image of the Cu(OH)2-Ag substrate; (c) XRD patterns of Cu(OH)2 and Cu(OH)2-Ag substrate; (d) distribution of Ag elements on the Cu(OH)2-Ag substrate; (e) distribution of Cu elements on the Cu(OH)2-Ag substrate; (f) energy dispersive spectrum of the Cu(OH)2-Ag substrate
Fig. 3. Influence of etching time on the surface morphology of Cu(OH)2 and Raman enhancement performance of Cu(OH)2-Ag substrate. (a)--(e) SEM images of Cu(OH)2 at different etching time; (f) Raman spectra of R6G with mass concentration of 10-6 g/L on Cu(OH)2-Ag substrates with different etching time
Fig. 4. Influence of self-assembly time on the Raman enhancement performance of Cu(OH)2-Ag substrate. (a)--(f) SEM images of Cu(OH)2-Ag substrates at different self-assembly time; (g) Ag content of Cu(OH)2-Ag substrates at different self-assembly time; (h) Raman spectra of R6G with mass concentration of 10-6 g/L on Cu(OH)2-Ag substrates with different self-assembly time
Fig. 5. SERS spectra of R6G. (a) Raman spectra of R6G with different mass concentration on different substrates; (b) Raman spectra of R6G with different mass concentration on Cu(OH)2-Ag substrate; (c) relationship between the logarithm of mass concentration and Raman intensity at 612 cm-1 of R6G
Fig. 6. SERS performance of Cu(OH)2-Ag substrate. (a) Raman spectra of R6G (10-6 g/L mass concentration) collected at 13 randomly selected points on the substrate; (b) Raman mapping of R6G on the substrate at 612 cm-1; (c) peak intensity variation at 612 cm-1 for 13 points; (d) peak intensity variation of R6G spectra at 612 cm-1 on the substrates with different batches; (e) peak intensity variation of R6G at 612 cm-1 at different storage times
Fig. 7. SERS of MG. (a) Raman spectra of MG with different mass concentration in river water on Cu(OH)2-Ag substrate; (b) relationship between the logarithm of mass concentration and Raman intensity at 1614 cm-1 of MG
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Erwei Liu, Xia Fan, Yuanping Huang, Yapeng Fan, Zengling Yang. Fabrication and Surface-Enhanced Raman Spectroscopy Performance of Three-Dimensional Cu(OH)2-Ag Substrate[J]. Acta Optica Sinica, 2021, 41(16): 1624001
Category: Optics at Surfaces
Received: Feb. 5, 2021
Accepted: Mar. 19, 2021
Published Online: Aug. 12, 2021
The Author Email: Yang Zengling (yangzengling@cau.edu.cn)