Ag／Si-NPA基底上共吸附R6G和CV的表面增强拉曼散射  

Surface-enhanced Raman Scattering of Rhodamine 6G and Crystal Violet Co-adsorbed on Ag/Si-NPA

作　　者：王永强[1,2] 王海燕[1,3] 马省[1] 李新建[1] 

机构地区：[1]郑州大学物理工程学院,材料物理教育部重点实验室,郑州450052 [2]河南理工大学物理化学学院,焦作454003 [3]郑州轻工业学院技术物理系,郑州450002

出　　处：《高等学校化学学报》2012年第6期1306-1311,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:11074224);河南省重大科技攻关项目(批准号:082101510007)资助

摘　　要：以硅纳米孔柱阵列(Si-NPA)为基底,采用浸渍沉积技术制备了具有较高表面增强拉曼散射(SERS)活性的Ag/Si-NPA衬底,并采用扫描电子显微镜和透射电子显微镜对其表面形貌和结构进行了表征.在此基础上,选择罗丹明6G(R6G)和结晶紫(CV)2种生物染料分子并采用不同的混合吸附程序对其共吸附状态下的SERS光谱进行了探测.结果表明,当2种分子的溶液浓度均为10-7 mol/L时,无论采用何种浸渍吸附程序,其SERS谱中CV的特征拉曼峰都被R6G完全掩盖.对溶液采用错级配置(R6G和CV的浓度分别为10-9和10-7 mol/L)后,所测SERS谱上获得了分别对应于R6G和CV的分离良好、相对强度匹配、分辨率高的2个SERS特征峰组,从而有利于简化现实混合探测过程中对SERS特征峰的指认和判断.Based on silicon nanoporous pillar array （Si-NPA）, an active substrate （Ag/Si-NPA） with strong surface-enhanced Raman scattering（SERS） effect was prepared by an immersion plating method. The surface morphology and structure of Ag/Si-NPA were characterized by field-emission scanning electron microscopy （FESEM） and transmission electron microscopy（TEM）. Choosing two important biological dyes, Rhodamine 6G（R6G） and crystal violet（CV）, as the target materials and adopting three different adsorbing procedures, the SERS spectra for RtG and CV co-adsorbed on Ag/Si-NPA were detected. It was found that the Raman peaks for CV were completely glossed over by that of RtG when the concentration of both solutions was 10-7 tool/L, no matter what adsorbing procedure was adopted. The phenomenon was explained based on the experi- mental conditions and results. When the solution concentrations for R6G and CV were chosen as 10-9 and 10-7 tool/L, two groups of characteristic SERS peaks with good separation, well-matched relative intensity and high resolution, corresponding to R6G and CV, respectively, were obtained. Such a SERS spectrum was very help- ful for predigesting the indexing and estimating procedure about the characteristic peaks. Our results might provid an investigable route for realizing the SERS detection of multi-dye labeled complex bio-molecule systems.

关 键 词：罗丹明6G 结晶紫 硅纳米孔柱阵列 Ag/Si—NPA 表面增强拉曼散射 共吸附 

分 类 号：O647[理学—物理化学]