In Situ Detection of Trace Furfural in Aqueous Solution Based on Au Nanoparticle/Au Film Surface-Enhanced Raman Spectroscopy

Figure 6

(a) The SERS spectra of 10⁻² mol/L furfural solution at six randomly selected points collected on six-layered substrates. (b) Changes in the SERS intensity of furfural characteristic peak (1665 cm⁻¹) with time.

(a)

(b)