Optimization and characterization of Au cuboid nanostructures as a SERS device for sensing applications

M. Chirumamilla*, Gobind Das, A. Toma, A. Gopalakrishnan, R. Proietti Zaccaria, Carlo Liberale, F. De Angelis, Enzo Di Fabrizio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Gold cuboid nanostructures with edge size in the range of 40-65 nm and inter-particle separation of 20 nm were fabricated by electron beam lithography. The aim of the present work is to investigate the effect of cuboid size on surface enhanced Raman scattering intensity and, thereby, to optimize the size of nanostructures in order to maximize signal enhancement. The electric field distribution of 4 × 4 array of Au cuboid nanostructures was numerically simulated by commercial software. A monolayer of Rhodamine-6G is deposited on the device using chemisorption technique, finding an enhancement factor ∼10 4, which candidates the cuboid nanostructures as a promising enhanced Raman substrate.

Original languageEnglish (US)
Pages (from-to)189-192
Number of pages4
JournalMicroelectronic Engineering
Volume97
DOIs
StatePublished - Sep 1 2012

Keywords

  • Biosensor
  • Cuboid nanostructures
  • Electron beam lithography
  • Plasmonics
  • SERS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

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