The European Physical Journal Special Topics

, Volume 224, Issue 9, pp 2001–2010 | Cite as

Detection of Rhodamine 6G at low concentrations using Raman Spectroscopy: A comparison between Ag and Au-based nanoporous substrates

  • D. Fernand
  • D. Bergé-Lefranc
  • C. Pardanaud
  • T.N.T. Phan
  • A. Merlen
  • V. Hornebecq
Regular Article
Part of the following topical collections:
  1. Advances in Design and Modeling of Porous Materials


The detection of R6G on nanoporous susbtrates at low concentrations (10−4 M < C < 10−7M) was studied coupling its thermodynamic adsorption properties and its Raman response. Two susbtrates were used, they consist in a mesoporous silica matrix in which Ag or Au nanoparticles are incorporated. From a thermodynamic point of view, it was evidenced, using adsorption isotherms and enthalpies, that R6G presents a higher affinity towards Ag@SiO2 than Au@SiO2. Furthermore, for C >1.10−6 M, it was evidenced that R6G Raman response does not depend on metal chemical nature. It is linearly correlated to R6G adsorbed amounts, evidencing the pre-concentration property of the substrates. For lower concentrations, differences were observed in Raman responses. For C = 1.10−6 M, the Raman bands of R6G adsorbed on SiO2 and Au@SiO2 are similar to those found at higher concentrations. For Ag@SiO2, two new bands, corresponding to bending modes of ethylamine groups, are present as well as the band related to Ag-N stretching mode. This was explained by the specific interaction developed between R6G and Ag@SiO2. For C = 1.10−7 M, only the two bands related to R6G ethylamine groups are present for all substrates and a Raman signal enhancement was found for Ag-based substrate.


SERS European Physical Journal Special Topic Adsorbed Amount Adsorption Enthalpy Raman Response 
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Copyright information

© EDP Sciences and Springer 2015

Authors and Affiliations

  • D. Fernand
    • 1
  • D. Bergé-Lefranc
    • 2
  • C. Pardanaud
    • 3
  • T.N.T. Phan
    • 4
  • A. Merlen
    • 5
  • V. Hornebecq
    • 1
  1. 1.Aix Marseille Université, CNRS, MADIREL UMR 7246, Centre de Saint-JérômeMarseille Cedex 20France
  2. 2.Aix Marseille Université, CNRS, IMBE, UMR 7263, Biogénotoxicologie – Santé Humaine et Environnement, Faculté de PharmacieMarseille Cedex 5France
  3. 3.Aix Marseille Université, CNRS, PIIM UMR 7345, Centre de Saint-JérômeMarseille Cedex 20France
  4. 4.Aix Marseille Université, CNRS, ICR UMR 7273, Centre de Saint-JérômeMarseille Cedex 20France
  5. 5.IM2NP, UMR 7334, Site de l’Université de Toulon – CNRSLa Garde CedexFrance

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