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利用化学沉积法和溶胶法制备了粒径在20~100 nm范围内不同的表面增强纳米结构活性银膜,系统地研究了单壁碳纳米管(SWCNT)的表面增强拉曼光谱(SERS)的G-band和D-band.比较玻璃和石英两种不同基片上的结果发现,单壁碳管的SERS谱随银膜粒径的变化有相同的变化趋势.G-band峰移对20~100nm范围内活性银膜粒径的差异不敏感,表明该波段所对应的碳管六元环本征振动比较稳定,与界面的化学相互作用较弱.D-band的峰形随基片和活性银膜粒径不同均有改变,且随着粒径变小,高频振动贡献有增大的趋势,表明无序碳与活性银膜间存在很强的相互作用.
Surface active nanostructured silver films with different particle sizes in the range of 20 ~ 100 nm were prepared by chemical deposition and sol-gel methods. Surface-enhanced Raman spectroscopy (SERS) of single-walled carbon nanotubes (SWCNTs) G-band and D-band.Comparing the results of glass and quartz on two different substrates, we found that the SERS spectrum of single-walled carbon nanotubes (CNTs) has the same trend with the change of silver film size.The shift of G-band to 20 ~ 100nm The results show that the corresponding vibration of the six-membered ring of carbon nanotubes in this band is relatively stable and the chemical interaction with the interface is weak.The peak shape of D-band varies with the substrate and active silver The differences in the sizes of the films changed, and as the particle size became smaller, the contribution of high-frequency vibration tended to increase, indicating a strong interaction between the disordered carbon and the active silver film.