High-Density Periodic Arrays of Self-Aligned Subwavelength Nanopyramids for Surface-Enhanced Raman Spectroscopy

Mingliang Jin, V.V. Pully, Cornelis Otto, Albert van den Berg, Edwin Carlen

Research output: Contribution to journalArticleAcademicpeer-review

52 Citations (Scopus)

Abstract

Novel nanotextured surfaces are presented with periodically self-aligned subwavelength nanogroove and nanopyramid structures with precisely defined pitch lambda(g) that are closely packed with 2 nm separation gaps over large areas and form high-density arrays of hot-spot scattering sites ideally suited for surface-enhanced Raman scattering (SERS) and Raman spectroscopy. The simple self-aligning fabrication technique requires only a single lithography step and wet anisotropic etching. Measured average Raman enhancement factors of G approximate to 10(6) from rhodamine 60 (R6G) on patterned Au surfaces with lambda(g) = 200 nm are consistent with numerical calculations. The nanostructured surfaces can be scaled to smaller dimensions, which results in increased enhancement as well as increased hot-spot spatial density.
Original languageUndefined
Pages (from-to)21953-21959
Number of pages7
JournalJournal of physical chemistry C
Volume114
Issue number50
DOIs
Publication statusPublished - 2010

Keywords

  • EWI-19002
  • IR-75885
  • METIS-279122

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