Influence of the interface on the optical activity of confined glucose films - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Colloid and Interface Science Année : 2016

Influence of the interface on the optical activity of confined glucose films

Janine Emile
Aziz Ghoufi

Résumé

We report on the time evolution of the optical activity of a thinning liquid film containing glucose, and confined between two glass slides. This dynamics strongly depends on the presence of surfactant molecules. With sodium dodecyl sulfate (SDS), we evidence favorable interactions of sugar molecules with the sulfate group. As previously observed for a freely suspended soap film in the air (see Emile et al., 2013), this corresponds to an anchoring of glucose molecules at the interface. For glucose alone, we also highlight a molecular rearrangement that is not instantaneous and occurs after several minutes. This interfacial organization leads to an unusual giant optical activity that is different with or without SDS. Molecular simulations confirm the anchoring of the glucose molecules at the glass/liquid interface, and show a different molecular orientation in each case
Fichier principal
Vignette du fichier
Influence of the interface on the optical activity.pdf (705.48 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01331955 , version 1 (17-11-2016)

Identifiants

Citer

Olivier Emile, Janine Emile, Aziz Ghoufi. Influence of the interface on the optical activity of confined glucose films. Journal of Colloid and Interface Science, 2016, 477, pp.103-108. ⟨10.1016/j.jcis.2016.05.047⟩. ⟨hal-01331955⟩
62 Consultations
132 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More