title: Switchable self-assembly of Prussian blue analogs nano-tiles triggered by salt stimulus.
abstract: Prussian blue analogs (PBAs) are materials well known for their bulk physical and (electro)-chemical properties, with an outstanding selectivity for caesium in ion exchange processes. Crystalline nano-tiles, made of copper based PBA, are produced and dispersed in water by tuning their electrostatic interactions. The shape and size of the nano-crystals are determined by combining scattering, microscopic and spectral techniques. We show here that Cu-PBA nano-tiles form planar superstructures by an edge to edge self-assembly process controlled by specific cation effect and ionic strength. Sedimentation and (re-)dispersion of the nano-tiles are found to be fully reversible. This switchable anisotropic self-assembly triggered by salt stimulus makes PBA nanocrystals potentially interesting for applications.
authors.affiliation: Institut de Chimie Séparative de Marcoule ICSM, UMR 5257, CNRS/CEA/UM/ENSCM, BP 17171, Bagnols-sur-Céze 30207, France. pierre.bauduin@cea.fr.
authors.forename: D
authors.initials: D
authors.lastname: Dedovets
authors.affiliation: Institut de Chimie Séparative de Marcoule ICSM, UMR 5257, CNRS/CEA/UM/ENSCM, BP 17171, Bagnols-sur-Céze 30207, France. pierre.bauduin@cea.fr.
authors.forename: P
authors.initials: P
authors.lastname: Bauduin
authors.affiliation: Institut de Chimie Séparative de Marcoule ICSM, UMR 5257, CNRS/CEA/UM/ENSCM, BP 17171, Bagnols-sur-Céze 30207, France. pierre.bauduin@cea.fr.
authors.forename: J
authors.initials: J
authors.lastname: Causse
authors.affiliation: Institut de Chimie Séparative de Marcoule ICSM, UMR 5257, CNRS/CEA/UM/ENSCM, BP 17171, Bagnols-sur-Céze 30207, France. pierre.bauduin@cea.fr.
authors.forename: L
authors.initials: L
authors.lastname: Girard
authors.affiliation: Institut de Chimie Séparative de Marcoule ICSM, UMR 5257, CNRS/CEA/UM/ENSCM, BP 17171, Bagnols-sur-Céze 30207, France. pierre.bauduin@cea.fr.
authors.forename: O
authors.initials: O
authors.lastname: Diat