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Comparison of adhesion layers of gold on silicate glasses for SERS detection ArchiMer
Colas, Florent; Barchiesi, D.; Kessentini, S.; Toury, T.; De La Chapelle, M. Lamy.
Gold is one of the most widely used metals for building up plasmonic devices. Although slightly less efficient than silver for producing sharp resonance, its chemical properties make it one of the best choices for designing sensors. Sticking gold on a silicate glass substrate requires an adhesion layer, whose effect has to be taken into account. Traditionally, metals (Cr or Ti) or dielectric materials (TiO2 or Cr2O3 ) are deposited between the glass and the nanoparticle. Recently, indium tin oxide and (3-mercaptopropyl)trimethoxysilane (MPTMS) were used as a new adhesion layer. The aim of this work is to compare these six adhesion layers for surface- enhanced Raman scattering sensors by numerical modeling. The near-field and the far-field optical responses...
Tipo: Text Palavras-chave: Surface-enhanced raman scattering; Adhesion layer; Nanocylinder; Discrete dipole approximation.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00298/40907/40083.pdf
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Propriétés optiques et thermoplasmoniques de réseaux de nanocylindres: applications à la détection de molécules et de micro-objets ArchiMer
Colas, Florent.
Raman spectroscopy is a technique that is non-invasive, non-destructive, allowing the identification of the molecules contained in a solid, liquid or gaseous sample. However it suffers from one major drawback : low sensitivity. This limit is now about to be pushed through the fast growth of SERS (Surface Enhanced Raman Scattering). This phenomenon has been already implemented successfully in various applications : biomedical, biology, analytical chemistry, environmental science... However, despite a growing number of scientific works, some aspects of the SERS sensors still need to be studied. This work focused on the study of the near-field and the far-field properties of arrays of nanocylinders for the detection of organic compounds. The studied parameters are...
Tipo: Text Palavras-chave: Plasmon de surface; Diffusion raman exaltee de surface; Champ proche; Champ lointain; Nanocylindres; Thermoplasmonique; Pinces optiques.; Surface plasmon; Near-field; Far-field; Nanocylinder; Thermoplasmonic; Surface enhanced raman scattering; Optical tweezers..
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00620/73191/72385.pdf
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