Xiaofeng Shi, Xinmin Zhang, Xia Yan, Lizhen Ma, Xu Zhang, Haikuan Ma, Jun Ma. Detection of Polycyclic Aromatic Hydrocarbons (PAHs) in Water Based on Three-Dimensional Surface-Enhanced Raman Scattering Substrates[J]. Acta Optica Sinica, 2018, 38(7): 0724001
- Acta Optica Sinica
- Vol. 38, Issue 7, 0724001 (2018)
Fig. 1. Schematic of polymerization reaction of GMA-EDMA porous material
Fig. 2. Flow chart of preparation of 3D SERS substrates and spectra collection of SERS
Fig. 3. SEM images of 3D SERS substrates. (a) Blank GMA-EDMA porous material; (b) Au-nanoparticle-absorbed GMA-EDMA porous material
Fig. 4. SERS spectra of pyrene solution (1×10-7 mol·L-1) obtained with two different substrates
Fig. 5. Raman spectra of solid phenanthrene and SERS spectra of phenanthrene solutions with different concentrations
Fig. 6. Relationship between Raman intensity at 707 cm-1 and 1351 cm-1 and concentration of phenanthrene solution
Fig. 7. Raman spectra of solid pyrene and SERS spectra of pyrene solutions with different concentrations
Fig. 8. Relationship between Raman intensity at 590 cm-1 and 1237 cm-1 and concentration of pyrene solution
Fig. 9. SERS spectra of benzo(k) fluoranthene solutions with different concentrations and Raman spectra of solid benzo(k) fluoranthene
Fig. 10. Relationship between Raman intensity at 548 cm-1 and 664 cm-1 and concentration of benzo(k) fluoranthene
Fig. 11. SERS spectra of benzo(k) fluoranthene, pyrene, phenanthrene with same concentration of 1×10-8 mol·L-1 and mixture of these three substances
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Table 1. Main Raman peak positions of phenanthrene, pyrene, and benzo(k) fluoranthene
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Table 2. Linear fitting equations and corresponding coefficients between Raman peak intensity and concentration of phenanthrene, pyrene, benzo(k) fluoranthene in the low concentration range
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