Performance characteristics of bio-inspired metal nanostructures as surface-enhanced Raman scattered (SERS) substrates

Hector I. Areizaga-Martinez, Ivan Kravchenko, Nickolay V. Lavrik, Michael J. Sepaniak, Samuel P. Hernández-Rivera, Marco A. De Jesús

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The fabrication of high-performance plasmonic nanomaterials for bio-sensing and trace chemical detection is a field of intense theoretical and experimental research. The use of metal-silicon nanopillar arrays as analytical sensors has been reported with reasonable results in recent years. The use of bio-inspired nanocomposite structures that follow the Fibonacci numerical architecture offers the opportunity to develop nanostructures with theoretically higher and more reproducible plasmonic fields over extended areas. The work presented here describes the nanofabrication process for a series of 40 μm × 40 μm bio-inspired arrays classified as asymmetric fractals (sunflower seeds and romanesco broccoli), bilaterally symmetric (acacia leaves and honeycombs), and radially symmetric (such as orchids and lily flowers) using electron beam lithography. In addition, analytical capabilities were evaluated using surface-enhanced Raman scattering (SERS). The substrate characterization and SERS performance of the developed substrates as the strategies to assess the design performance are presented and discussed.

Original languageEnglish
Pages (from-to)1432-1445
Number of pages14
JournalApplied Spectroscopy
Volume70
Issue number9
DOIs
StatePublished - Sep 1 2016

Keywords

  • Bio-inspired nanostructures
  • Fibonacci sequence
  • lithography
  • surface-enhanced spectroscopy

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