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Research Article

Highly effective and reproducible surface-enhanced Raman scattering substrates based on Ag pyramidal arrays

Yandong Wang1, Nan Lu1( ), Wentao Wang1, Lingxiao Liu1, Lei Feng1, Zhoufang Zeng1, Haibo Li1, Weiqing Xu1, Zijian Wu2, Wei Hu2, Yanqing Lu2, Lifeng Chi1,3
State Key Laboratory of Supramolecular Structure and MaterialsJilin UniversityChangchun130012China
National Laboratory of Solid State MicrostructuresNanjing UniversityNanjing210093China
Physikalisches Institut and Center for Nanotechnology (CeNTech)Westfälische Wilhelms-UniversitätMünsterD-48149Münster, Germany
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Abstract

Close-packed Ag pyramidal arrays have been fabricated by using inverted pyramidal pits on Si as a template and used to generate plentiful and homogeneous surface-enhanced Raman scattering (SERS) hot sites. The sharp nanotip and the four edges of the Ag pyramid result in strong electromagnetic field enhancement with an average enhancement factor (EF) of 2.84 × 107. Moreover, the features of the close-packed Ag pyramidal array can be well controlled, which allows SERS substrates with good reproducibility to be obtained. The relative standard deviation (RSD) was lower than 8.78% both across a single substrate and different batches of substrates.

Keywords

etchingSERSnanosphere lithographyAg pyramidal arrayreproducibility

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Nano Research
Volume 6 Issue 3,
March 2013
Pages 159-166
DOI: 10.1007/s12274-013-0291-0
Cite this article:
Wang Y, Lu N, Wang W, et al. Highly effective and reproducible surface-enhanced Raman scattering substrates based on Ag pyramidal arrays. Nano Research, 2013, 6(3): 159-166. https://doi.org/10.1007/s12274-013-0291-0

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Received: 14 November 2012
Revised: 29 December 2012
Accepted: 02 January 2013
Published: 18 January 2013
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2013
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