par De Decker, Yannick 
;Raghamy, Amir;Imbihl, Ronald
Référence The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 123, 18, page (11602-11610)
Publication Publié, 2019-05-01
;Raghamy, Amir;Imbihl, RonaldRéférence The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 123, 18, page (11602-11610)
Publication Publié, 2019-05-01
Article révisé par les pairs
| Résumé : | Phase transitions between different states of a system often involve a long-term maturation process known as ripening, whose mechanism can take various forms. Recent experimental investigations on phase transitions involving vanadium oxides on rhodium have shown the existence of a new ripening mechanism, during which micrometric islands of a dense VO x phase move and coalesce exclusively in the presence of a catalytic reaction. It was hypothesized that this new pathway is fueled by an underlying polymerization/depolymerization process. In this work, we develop a generic reaction-diffusion model containing the basic physicochemical ingredients of these systems. This model reproduces qualitatively the observed behaviors and confirms that it can be traced back to an interplay between intermolecular interactions and the nonequilibrium polymerization process. |
