KIP publications

year 2011
author(s) Dominik Enders, Tadaaki Nagao, Annemarie Pucci, Tomonobu Nakayama and Masakazu Aono
title Surface-enhanced ATR-IR spectroscopy with interface-grown plasmonic gold-island films near the percolation threshold
KIP-Nummer HD-KIP 11-195
KIP-Gruppe(n) F6
document type Paper
source Phys. Chem. Chem. Phys. 13 (2011) 4935-4941
doi 10.1039/C0CP01450H
Abstract (de)

Flat nano-island films prepared by wet-chemical deposition were investigated with attenuated total reflection infrared (ATR-IR) spectroscopy and scanning electron microscopy (SEM) in order to analyze the correlation between film morphology and optical properties. Here we choose Au as representative coinage metal (Au, Ag, Cu) that shows strong structure-dependent surface-enhanced infrared absorption (SEIRA). Infrared spectra of octadecanethiol monolayers on films of different stages of morphologic development show effects that are characteristic for SEIRA, such as enhanced vibrational signals, Fano-type line shape, and adsorbate induced baseline shifts. Their extent was found to be strongly dependent on the structural details and the strongest enhancement occurs at the percolation threshold of the two-dimensional island system. Also films beyond percolation show significant enhancement due to residual nanoholes that are acting as hotspots.

  author   = {Enders, Dominik and Nagao, Tadaaki and Pucci, Annemarie and Nakayama, Tomonobu and Aono, Masakazu},
  title    = {Surface-enhanced {ATR-IR} spectroscopy with interface-grown plasmonic gold-island films near the percolation threshold},
  journal  = {Phys. Chem. Chem. Phys.},
  year     = {2011},
  volume   = {13},
  pages    = {4935-4941},
  doi      = {10.1039/C0CP01450H},
  url      = {}
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