SERS of Crystal Violet Adsorbed on Submicrometer Rod-Like ZnO

Submicrometer rod-like ZnO was prepared by wet-chemical technique at 70 ℃.The material was characterized by UV-vis spectroscopy(UV-Vis),scanning electron microscopy(SEM),X-ray diffraction(XRD) and Raman spectroscopy.The optimized geometry of crystal violet(CV) was calculated at DFT/B3LYP level with 6-311G* basis set.Meanwhile,the surface-enhanced Raman scattering(SERS) activity of submicrometer rod-like ZnO was investigated using CV as a probe molecular.Results show that the rod-like submicrometer ZnO has high purity and crystallinity,which belongs to the Wurtzite-type structure.The enhancement factor of CV adsorbed on rod-like ZnO is up to 1.2×102,which is attributed to chemical enhancement.