 |
Article dans une revue
Self-assembled monolayers of aminosilanes chemically bonded onto silicon wafers for immobilization of purified humic acids
Abstract : In this paper, we report on the covalent attachment of humic acids on silicon wafers.
Monolayers of 11-amino-undecylsiloxane were prepared on silicon wafers by substitution of 11-bromo-undecylsiloxane with an azido group followed by a subsequent reduction. These substrates were coupled with humic acids via a diazotization procedure. Characterization of the functionalized surfaces was performed by different methods: ATR-FTIR, ellipsometry, AFM, TOF-SIMS and amino groups surface density was monitored by UV spectroscopy. These different methods confirmed the immobilization of humic acids on the substrates, consisting in a very useful tool for environmental applications, in particular, for determination of complexation constants between immobilized humic acid moiety and radionuclides. These miniaturized solid state system could be used as a sensitive detector for trace elements in fluid solutions or lixiviation studies in the framework of radionuclide dissemination and modelling studies from radioactive storage.
https://hal-normandie-univ.archives-ouvertes.fr/hal-02278755
Contributeur : Cécile Barbot <>
Soumis le : mercredi 4 septembre 2019 - 15:44:31
Dernière modification le : mercredi 10 juin 2020 - 19:22:06
Contributeur : Cécile Barbot <>
Soumis le : mercredi 4 septembre 2019 - 15:44:31
Dernière modification le : mercredi 10 juin 2020 - 19:22:06
