Hierarchical porous plasmonic metamaterials for reproducible ultrasensitive surface-enhanced raman spectroscopy

Xinyi Zhang, Yuanhui Zheng, Xin Liu, Wei Lu, Jiyan Dai, Dang Yuan Lei, Douglas Robert Macfarlane

Research output: Contribution to journalArticleResearchpeer-review

130 Citations (Scopus)

Abstract

Surface-enhanced Raman spectroscopy (SERS) has emerged as one of the most versatile tools for sensing and imaging chemical and biological analytes. SERS-based molecular detection can be achieved by using metal (mostly silver and gold) nanostructures as plasmonic antennas to amplify the Raman signals. While the enhanced Raman scattering by the nanohole arrays is mainly attributed to excitations of propagating surface plasmons via grating coupling, the nanoparticle arrays share the similar enhancement mechanism as individual nanostructures with excitations of LSPs. In addition, dealloyed nanoporous metals have also been exploited as attractive Raman-active structures because of their large surface area and three-dimensional (3D) bicontinuous porous configuration. Such unique features not only allow for excitations of LSPs but also provide a large number of molecular binding site.
Original languageEnglish
Pages (from-to)1090 - 1096
Number of pages7
JournalAdvanced Materials
Volume27
Issue number6
DOIs
Publication statusPublished - 2015

Keywords

  • Electromagnetic fields
  • Hierarchical porous metamaterials
  • Liquid-crystal-templating
  • Localized surface plasmons
  • Surface-enhanced Raman spectroscopy

Cite this