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PMBA (4-Mercaptobenzoic acid)

A - Silver-Gold Hybrid Substrate
B - Silver Substrate
C - Background
PMBA 10-6 M

The graph shows the difference between intensity of SERS signals of 10-6 M PMBA and background on Silver and Silver-Gold Hybrid Substrate.

Laser wavelength: 785 nm
Laser power: 6mW
Integration time: 1 second
Raman Spectrometer: B&WTEK
Lens magnification: 50x
Sampling method: immersion
Substrate used: Silver, Silver-Gold Hybrid