Surface Plasmon Resonance and Interference Coenhanced SERS Substrate of AAO/Al-Based Ag Nanostructure Arrays

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• 作者：Dongzhi Shan ; Liqing Huang ; Xin Li ; Weiwei Zhang ; Jun Wang ; Long Cheng ; Xuehong Feng ; You Liu ; Jingping Zhu ; Yu Zhang
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：October 16, 2014
• 年：2014
• 卷：118
• 期：41
• 页码：23930-23936
• 全文大小：625K
• ISSN：1932-7455

文摘

Surface-enhanced Raman scattering (SERS) substrate of Ag nanostructure arrays patterned by porous anodic aluminum oxide (AAO) membrane supported on Al substrate (AAO/Al) were fabricated by electron beam evaporation technique. By introducing Al substrate, the optical and SERS properties of as-prepared AAO/Al-based Ag nanostructure arrays are much different from those of the AAO-based array. By optimizing the thickness of both deposited Ag and AAO membrane, the SERS enhancement factor (EF) of as-fabricated AAO/Al-based Ag nanostructure arrays reached 9.77 脳 10⁷ due to the SPR and destructive interference coenhanced effects, which is higher than that of AAO-based Ag nanostructure arrays. Also, the mechanism of SPR and destructive interference coenhanced local EM fields as well as SERS enhancement were demonstrated by FDTD simulation results.