Figure 4 | Scientific Reports

Figure 4

From: 3D hotspot matrix of Au nanoparticles on Au island film with a spacer layer of dithiol molecules for highly sensitive surface-enhanced Raman spectroscopy

Figure 4

SERS performance of the AuNPs@BDMT@AuIF for R6G molecules. (a) Raman spectra for the AuIF and the AuNPs@BDMT@AuIF with different diameters of AuNPs at 10 μM of R6G concentration. The Raman signal of the AuNP_35nm@BDMT@AuIF sensor is about eight times higher than that of AuIF sensor. (b) SERS spectra of the AuNP_35nm@BDMT@AuIF sensor at R6G concentrations of 10−5 to 10−9 M. (c) Raman intensity at 611 cm−1 as a function of the logarithmic concentration of R6G for the AuIF, the AuNP_6nm@BDMT@AuIF, and the AuNP_35nm@BDMT@AuIF sensors. (d) Intensity distribution at 611 cm−1 was evaluated for 11 different regions at 10 μM of R6G concentration for the AuNP_35nm@BDMT@AuIF sensor.

Back to article page