Au Nanocucumbers with Interior Nanogap for Multiple Laser Wavelength-Compatible Surface-Enhanced Raman Scattering

Jae Ho Hwang, Nitin Kumar Singhal, Dong-Kwon Lim, Jwa Min Nam

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

It is critical to design and synthesize plasmonic nanostructures that can generate very strong and quantitative surface-enhanced Raman scattering (SERS) signals that could be amplified by multiple laser wavelengths to realize the full potential of SERS nanoprobes. Here, we report the synthesis of Au-nanobridged nanogap cucumbers (Au-NNCs) from DNA-modified Au nanorods and comparison of their SERS signals with three different Raman dyes with our recently reported Au-nanobridged nanogap spheres (Au-NNSs). Although the Au-NNSs generate highly stable and reliable signals, these spherical nanogap structures with a smooth surface produce strong SERS signals (SERS enhancement factor at ∼108) only with 633 nm excitation laser. The Au-NNCs with a bumpy surface generated up to ∼3-, ∼23-, and ∼130-fold higher SERS signals with 514, 633, and 785 nm excitation laser wavelengths, respectively, compared to the Au-NNSs.

Original languageEnglish
Pages (from-to)882-886
Number of pages5
JournalBulletin of the Korean Chemical Society
Volume36
Issue number3
DOIs
Publication statusPublished - 2015 Mar 1
Externally publishedYes

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Raman scattering
Wavelength
Lasers
Laser excitation
Nanoprobes
Nanorods
Nanostructures
Coloring Agents
DNA

Keywords

  • Core-shell particle
  • Gold nanorod
  • Multiple laser wavelength compatibility
  • Nanogap
  • Surface-enhanced Raman scattering

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Au Nanocucumbers with Interior Nanogap for Multiple Laser Wavelength-Compatible Surface-Enhanced Raman Scattering. / Hwang, Jae Ho; Singhal, Nitin Kumar; Lim, Dong-Kwon; Nam, Jwa Min.

In: Bulletin of the Korean Chemical Society, Vol. 36, No. 3, 01.03.2015, p. 882-886.

Research output: Contribution to journalArticle

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