Journal of Shanghai University(Natural Science Edition) ›› 2013, Vol. 19 ›› Issue (4): 417-422.

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Controlled Assembly of Ordered Nanoarrays for High SERS-active Substrates Using Templates

WANG Sha-sha, FU Qun, ZHOU Yi, ZHANG Hong-chao, WU Ming-hong, LEI Yong   

  1. (School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China)
  • Online:2013-08-27 Published:2013-08-27

Abstract: A simple method to fabricate a large-area highly ordered and structure controlled surface enhanced Raman active substrate with giant enhancement, uniformity and reproducibility is reported. Silver ordered nanocap arrays were fabricated using thermal evaporation in vacuum with UTAM as a shadow mask. The structure can be tuned further to optimize the enhancement factor according to UTAM fabrication parameters. The surface-enhanced Raman scattering (SERS) measurement results of active substrate with Rhodamine 6G as probe molecules showed a strong SERS effect with an enhancement factor (EF) up to 109, and high uniformity and reproducibility. Compared with the same thickness ordinary Ag film, the SERS enhancement effect of the Ag nanocap arrays is about 16.4 times stronger. This preparation method has the advantages of simple operation, low cost, ease of mass production, and high repeatability between different batches. The active substrate can be used for trace analysis on chemicals and biological molecules.

Key words: Ag nanoarrays arrays, reproducibility, surface-enhanced Raman scattering (SERS), ultra-thin alumina mask (UTAM), uniformity

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