Structural Characterization of Self-Assembled Monolayers of Organosilanes Chemically Bonded on Silica Wafers by Dynamical Force Microscopy

Sébastien Navarre (1) , Franck Choplin (1) , J. Bousbaa (1) , Bernard Bennetau (1) , Laurent Nony (2) , Jean-Pierre Aimé (3)

1 LCOO - Laboratoire de chimie organique et organométallique
2 L2MP - Laboratoire matériaux et microélectronique de Provence
3 CPMOH - Centre de physique moléculaire optique et hertzienne

In this article, a dynamical force microscopy study of self-assembled monolayers of organosilanes, grafted on a silica support, is reported. Organosilanes, terminated either with a functional group (ethylene glycol) or with a methyl group, were used. The influence of the reaction time and the solvent composition on the grafting was investigated to improve the homogeneity of the self-assembled monolayers. Numerical simulations of approach-retract curves, obtained in the tapping mode, were performed and compared to experimental ones. Informations, such as mechanical response and height of the grafted organic layers, have been obtained.

Mots clés: self-assembled monolayers; silanes; AFM; Tapping; Nonlinear dynamics

Domaines: Agrégats Moléculaires et Atomiques [physics.atm-clus]; Matière Molle [cond-mat.soft]

Sébastien Navarre, Franck Choplin, J. Bousbaa, Bernard Bennetau, Laurent Nony, et al.. Structural Characterization of Self-Assembled Monolayers of Organosilanes Chemically Bonded on Silica Wafers by Dynamical Force Microscopy. Langmuir, 2001, 17, pp.4844-4850. ⟨hal-00004533⟩