Jump to main content
Jump to site search

Issue 29, 2016
Previous Article Next Article

Dynamics of a plasmon-activated p-mercaptobenzoic acid layer deposited over Au nanoparticles using time-resolved SERS

Author affiliations

Abstract

Time-dependent SERS intensity recorded over a drop-coated coffee-ring pattern of p-MBA with gold colloids was investigated as a function of the specific laser power applied. Pure electromagnetic enhancement produced stochastic intensity variations of the whole SER spectra, which were mainly correlated with evolutions of the background intensity. Besides long-term, non-reversible spectral changes caused by plasmon-induced decarboxylation of p-MBA, transient original spectral profiles showing additional lines were also observed as the specific power reached 5.5 × 104 W cm−2. An unprecedented qualitative and quantitative study of SERS intensity variations based on the complementary use of both extreme deviation and cross-correlation statistics is provided, which resulted in an improved understanding of SERS mechanisms. More precisely, cross-correlation analysis made it possible to follow the evolution of groups of modes assigned to one species or sharing the same symmetry while so-called individual events denote particular resonance structures, whose occurrence was tentatively related to a photo-thermally activated motion of the gold nanostructures.

Graphical abstract: Dynamics of a plasmon-activated p-mercaptobenzoic acid layer deposited over Au nanoparticles using time-resolved SERS

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Apr 2016, accepted on 26 Apr 2016 and first published on 26 Apr 2016


Article type: Paper
DOI: 10.1039/C6CP02353C
Author version available: Download Author version (PDF)
Citation: Phys. Chem. Chem. Phys., 2016,18, 19567-19573
  •   Request permissions

    Dynamics of a plasmon-activated p-mercaptobenzoic acid layer deposited over Au nanoparticles using time-resolved SERS

    G. Smith, J. Girardon, J. Paul and E. Berrier, Phys. Chem. Chem. Phys., 2016, 18, 19567
    DOI: 10.1039/C6CP02353C

Search articles by author

Spotlight

Advertisements