Surface-enhanced Raman scattering on gold nanorod pairs with interconnection bars of different widths

Weisheng Yue, Yang Yang, Zhihong Wang, Longqing Chen, Xianbin Wang

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We demonstrate that surface-enhanced Raman scattering (SERS) enhancement could be tuned by adjusting the width of a connection bar at the bottom of a gold nanorod pair. Arrays of gold nanorod pairs with interconnection bars of different widths at the bottom of the interspace were fabricated by electron-beam lithography and used for the SERS study. Rhodamine 6G (R6G) was used as the probe molecule for the SERS. In addition to the large SERS enhancement observed in the nanostructured substrates, the SERS enhancement increases as the width of the connection bar increases. This result provides an important method for tuning SERS enhancement. Numerical simulations of electromagnetic properties on the nanostructures were performed with CST Microwave Studio, and the results correspond well with the experimental observations. © 2012 Elsevier B.V. All rights reserved.
Original languageEnglish (US)
Pages (from-to)734-738
Number of pages5
JournalSensors and Actuators B: Chemical
Volume171-172
DOIs
StatePublished - Aug 2012

ASJC Scopus subject areas

  • Materials Chemistry
  • Instrumentation
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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