Robust SERS substrates with massive nanogaps derived from silver nanocubes self-assembled on massed silver mirror via 1,2-ethanedithiol monolayer as linkage and ultra-thin spacer

Shu Chun Cheng, Ten Chin Wen

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Robust SERS substrates with hotspots on a large scale from massive nanogaps can be fabricated by assembling Ag nanocubes on the massed Ag mirror via 1,2-ethanedithiol monolayer as linkage and ultra-thin spacer. X-ray spectroscopy was used to confirm the existence of nanogaps. The plasmonic interaction between Ag nanocubes and the massed Ag mirror was corroborated by UV-Vis spectra. The strength and frequency change of plasmon resonance indicates the electrical field coupling between Ag nanocubes and the massed Ag surface. The 1,2-ethanedithiol spacer prevents the plasmon quench from complete contact between Ag nanocubes and the massed Ag surface, being corroborated by both simulations and SERS results. The SERS results prove the supreme performance of the robust substrate by detecting 10-9 M rhodamine 6G solution with high sensitivity (analytical enhancement factor 2.8 × 108), high reliability (6.6% standard deviation from 20-sites measurements), and high precision (calibration line with 99.9% correlation coefficient).

Original languageEnglish
Pages (from-to)1331-1337
Number of pages7
JournalMaterials Chemistry and Physics
Volume143
Issue number3
DOIs
Publication statusPublished - 2014 Feb 14

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics

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