Improved Quantitative SERS Enabled by Surface Plasmon Enhanced Elastic Light Scattering.

ABSTRACT: The application of surface-enhanced Raman spectroscopy (SERS) for everyday quantitative analysis is hindered by the point-to-point variability of SERS substrates that arises due to the heterogeneous distribution of localized electromagnetic fields across a suite of plasmonic nanostructures. Herein, we adopt surface-enhanced elastic scattering as a SERS internal standard. Both elastic and inelastic (i.e., Raman) scattering are simultaneously enhanced by a given "hot spot", and thus, the surface-enhanced elastic scattering signal provides a localized intrinsic internal standard that scales across all of the plasmon-enhanced electromagnetic fields within a substrate. Elastically scattered light originates from the amplified spontaneous emission (ASE) of the commercial laser, leading to the fo

SUBMITTER: Wei H 

PROVIDER: S-EPMC5981291 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature