Keywords: طیف سنجی مادون قرمز افزایش سطح; Nanoparticles; Nanomaterials; Infrared spectroscopy; Surface-enhanced infrared spectroscopy; Functionalization; Infrared imaging; CDs; Carbon dots; DR-FTNIR; Diffuse reflectance Fourier transform near-infrared; DRIFTS; Diffuse reflectance infrared Fourier