Abstract: Surface-enhanced Raman Scattering(SERS) spectra of single-walled carbon nanotubes(SWCNTs) on silver films with different nano-particle sizes from 20-100 nm deposited on quartz and glass substrates were studied systematically.The characteristic Raman spectral features of SWCNT G-band and D-band were analyzed.The two bands show a similar tendency with the change of nano-particle size of silver on quartz and glass substrates.The position and the intensity of the G-band are less sensitive to the films silver particle sizes in the studied range,indicating that hexagonal carbon rings are stable and have a weak interaction with silver films.The shape of the D-band is dependent on the silver size.The smaller the silver particle size,the more the contribution of high frequency vibrations to the D-band,indicating that disorder carbon has a strong interaction with the active silver films.

Key words: Single-walled carbon nanotube, Surface-enhanced Raman scattering spectrum, Silver film, Nano-particle size