Growth of gold nanoparticles at gelatin-silica bio-interfaces
Imen Bensaid,
Sylvie Masse,
Mohamed Selmane,
Shemseddine Fessi,
Thibaud Coradin
Affiliations
Imen Bensaid
Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 11 Place Marcelin Berthelot, 75005 Paris, France
Sylvie Masse
Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 11 Place Marcelin Berthelot, 75005 Paris, France
Mohamed Selmane
Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 11 Place Marcelin Berthelot, 75005 Paris, France
Shemseddine Fessi
Laboratoire de Chimie des Matériaux et Catalyse, Département de Chimie, Faculté des Sciences de Tunis, Campus Universitaire de Tunis El Manar, 2092 Tunis, Tunisia
Thibaud Coradin
Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 11 Place Marcelin Berthelot, 75005 Paris, France
The growth of gold nanoparticles via chemical reduction of HAuCl4 dispersed in gelatin-silicate mixtures was studied. Gelatin leads to densely packed nanoparticles whereas open colloidal aggregates with tight boundaries are formed within silica. Within the bio-hybrid systems, gold species are located within the gelatin-silicate particles and/or within the gelatin phase, depending on the preparation conditions. These various localizations and their impact on the final nanoparticle structure are discussed considering attractive and repulsive electrostatic interactions existing between the three components. These data suggest that bio-hybrid systems are interesting and versatile interfaces to study crystallization processes in confined environments.
