Fig. 1. Experimental setup for preparing fiber SERS probes with laser-induced self-assembly method in a meniscus

Fig. 2. (a) Homemade instrument for SERS detection using fiber SERS probes; (b) measured SERS spectra of fiber SERS probes fabricated with different laser radiation times when laser irradiation has a power of 70 mW; (c) relationship between SERS intensity and laser radiation time at Raman peak of 1376 cm-1; (d)-(f) SEM images of fiber probes with different laser radiation times at 3, 7, and 9 min, respectively

Fig. 3. SERS results for the fiber probes at different laser powers of (a) 60 mW and (b) 85 mW; (c) relationship between SERS intensity and laser radiation time under different laser powers of 60, 70, and 85 mW for the Raman peak of 1376 cm-1

Fig. 4. SERS results of 10-5 mol/L thiram by the optimized fiber SERS probes. (a) Repeatability; (b) sensitivity

Fig. 5. SERS detection sensitivity of methyl parathion by optimized fiber SERS probes