Wrinkled nanoporous gold films with ultrahigh surface-enhanced raman scattering enhancement

Ling Zhang, Xingyou Lang, Akihiko Hirata, Mingwei Chen

Research output: Contribution to journalArticlepeer-review

188 Citations (Scopus)

Abstract

Amplified by plasomonic nanostructured metals, Raman intensity of organic molecules and biomolecules can be dramatically improved, particularly at "hot spots" where intense electromagnetic fields are produced in the vicinity of narrow nanogaps between metallic nanostructures. Therefore, developing new substrates with a high density of "hot spots" has been the recent topic of intense study. Here we report wrinkled nanoporous gold films that contain abundant Raman-active nanogaps produced by deformation and fracture of nanowire-like gold ligaments. This novel nanostructure yields ultrahigh surface enhanced Raman scattering for molecule detection.

Original languageEnglish
Pages (from-to)4407-4413
Number of pages7
JournalACS Nano
Volume5
Issue number6
DOIs
Publication statusPublished - 2011 Jun 28
Externally publishedYes

Keywords

  • nanogaps
  • nanoporous gold (NPG)
  • surface-enhanced Raman scattering (SERS)
  • wrinkle

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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