Self-assembled monolayers of aminosilanes chemically bonded onto silicon wafers for immobilization of purified humic acids

C. Barbot; O. Bouloussa; W. Szymczak; M. Plaschke; G. Buckau; J.-P. Durand; J. Pieri; J.I. Kim; F. Goudard

Self-assembled monolayers of aminosilanes chemically bonded onto silicon wafers for immobilization of purified humic acids

C. Barbot ^{1, 2} O. Bouloussa ³ W. Szymczak ⁴ M. Plaschke ⁵ G. Buckau ⁵ J.-P. Durand ^{1, 2} J. Pieri ^{1, 2} J.I. Kim ⁵ F. Goudard ^{1, 2}

1 GERMETRAD - Laboratoire GERMETRAD

2 MMS - Mer, molécules et santé EA 2160

3 Institut Curie

4 HZM - Helmholtz-Zentrum München

5 Forschungszentrum Karlsruhe

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.

Keywords : Humic acid ATR-FTIR SAMs TOF-SIMS AFM

Type de document :

Article dans une revue

Domaine :

Chimie

Chimie / Chimie inorganique

Liste complète des métadonnées

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 6 novembre 2019 - 13:21:57

Self-assembled monolayers of aminosilanes chemically bonded onto silicon wafers for immobilization of purified humic acids

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Self-assembled monolayers of aminosilanes chemically bonded onto silicon wafers for immobilization of purified humic acids

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