罗丹明6G在银纳米线阵列上的SERS光谱研究

Surface-Enhanced Raman Scattering Spectra of Rh6G Adsorbed on Ag Nanowire Arrays

制备出有序、均匀的活性衬底一直是表面增强拉曼散射(SERS)研究中的关键。阳极氧化法制备的多孔氧化铝膜的结构有序、均匀,为纳米金属SERS基底的制备提供了模板。以沉积了银的多孔氧化铝组装体为衬底,研究了罗丹明6G(Rh6G)分子的表面增强拉曼散射光谱。结果表明,沉积了银的多孔氧化铝模板是很好的SERS衬底,Rh6G分子在此衬底上的SERS谱强度与银纳米线在表面的显露高度有关,而其拉曼频移未受表面状态的影响,而PO34-离子的存在使SERS强度得到很大提高。

The degree of order and uniform of substrates is the key to surface-enhanced Raman scattering study.The structure of porous alumina template by anodic oxidation method is ordered and uniform and the template could be used as the substrate of SERS.Nanowire arrays of Ag were fabricated from the template of porous alumina.The authors observed the SERS signals of the Rh6G adsorbed on the Ag nanowire arrays. The results revealed that the SERS intensity depended on the length of the wires that emerged on the surface that was controlled by the etching time,but the frequency was not affected by the surface condition;the results also revealed that PO34 can increase the intensity of SERS signals.