Designed fabrication of ordered porous Au/Ag nanostructured films for surface-enhanced Raman scattering substrates
Designed fabrication of ordered porous Au/Ag nanostructured films for surface-enhanced Raman scattering substrates
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DOI：
10.1021/la052659u
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发表时间：
2006-03-14
期刊：
影响因子：
3.9
通讯作者：
Ozaki, Y
中科院分区：
文献类型：
--
作者：
Lu, LH;Eychmüller, A;Ozaki, Y
本文报道了两种新型多孔金属纳米结构薄膜的设计制备，即有序大孔Au/Ag纳米结构薄膜和有序中空Au/Ag纳米结构薄膜。与以往报道不同的是，本文提出的方法可以方便地通过简单地改变实验条件来控制薄膜结构。用扫描电子显微镜（SEM）对薄膜的形貌进行了表征，并以罗丹明6G（R6G）为探针分子，对其作为表面增强拉曼散射（SERS）基底的性能进行了评价。我们表明，这种多孔纳米结构的膜组成的较大的互连的聚集体是非常可取的SERS基板方面的高拉曼强度增强，优异的稳定性和再现性。相互连接的纳米结构聚集体，长程有序的孔隙度，和纳米级的粗糙度是负责这种大的SERS增强能力的重要因素。
This article reports the designed preparation of two different kinds of novel porous metal nanostructured films, namely, an ordered macroporous Au/Ag nanostructured film and an ordered hollow Au/Ag nanostructured film. Different from previous reports, the presently proposed method can be conveniently used to control film structures by simply varying the experimental conditions. The morphology of these films has been characterized by scanning electron microscopy (SEM), and their performance as surface-enhanced Raman scattering (SERS) substrates has been evaluated by using rhodamine 6G (R6G) as a probe molecule. We show that such porous nanostructured films consisting of larger interconnected aggregates are highly desirable as SERS substrates in terms of high Raman intensity enhancement, excellent stability, and reproducibility. The interconnected nanostructured aggregate, long-range ordering porosity, and nanoscale roughness are important factors responsible for this large SERS enhancement ability.