Authors: JeanFrançois Bryche Raymond Gillibert Grégory Barbillon Philippe Gogol Julien Moreau Marc Lamy de la Chapelle Bernard Bartenlian Michael Canva
Publish Date: 2015/09/30
Volume: 11, Issue: 2, Pages: 601-608
Abstract
In this paper we report on an improved enhancement of the surfaceenhanced Raman scattering SERS effect Such improvement is obtained by using a continuous gold film underlayer which is added below an array of gold nanostructures Two types of nanostructures were studied to validate our results regular disk arrays with two diameters 110 and 210 nm and lines with a width of 110 nm all on a gold film of 30 nm thick A supplementary gain of one order of magnitude on the SERS enhancement factor EF was experimentally demonstrated for several excitation wavelengths 633 660 and 785 nm With such SERS substrates EFs of 107 are observed for thiophenol detection This opens the way towards routine and reliable detection of molecules at low concentrationThe authors acknowledge ANR P2N ANR12NANO0016 and the support of the French Government for partial funding of the project in which this work takes place This work was partly supported by the French RENATECH network IOGS/CNRS is also part of the European Network of Excellence in BioPhotonics Photonics for Life P4L
Keywords: