Surface-enhanced Raman scattering imaging of a single molecule on urchin-like silver nanowires

Wei Han Hsiao, Hsin Yu Chen, Yu Cheng Yang, Yu Liang Chen, Chi Young Lee, Hsin-Tien Chiu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Urchin-like silver nanowires are prepared by reacting AgNO3(aq) with copper metal in the presence of cetyltrimethylammonium chloride and HNO3(aq) on a screen-printed carbon electrode at room temperature. The diameters of the nanowires are about 100 nm, and their lengths are up to 10 μm. Using Raman spectroscopy, the detection limit of Rhodamine 6G (R6G) on the urchin-like silver nanowire substrate can be as low as 10-16 M, while the analytical enhancement factor is about 1013. Raman mapping images confirm that a single R6G molecule on the substrate can be detected.

Original languageEnglish
Pages (from-to)3280-3284
Number of pages5
JournalACS Applied Materials and Interfaces
Volume3
Issue number9
DOIs
StatePublished - 28 Sep 2011

Keywords

  • galvanic reduction
  • Rhodamine 6G
  • silver nanowires
  • single-molecule detection
  • surface-enhanced Raman spectroscopy

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