Spin crossover micro and nanoparticles embedded in various
environments: an experimental and theoretical study


The aim of the project is to understand the behaviour of spin crossover micro and nano particles interacting with the environment, in order to handle and apply the properties of the bistability and switching of these materials at meso and nanoscale. The long term perspective consists in clarifying the possibilities of their application for the storage of high density information, or for their use as sensors and actuators. The systematic experimental studies will be correlated and interpreted by the simultaneous use of theoretical and numerical studies. The theoretical studies will be based on the experimental data and will be used not only to explain the observations, but also for correcting the experiments and to propose new experimental procedures.

         The idea of this scientific project is centred on the study of spin crossover micro and nanoparticles dispersed in various environments, either polymeric for the beginning or piezoelectric in a second stage. This idea is based on the fact that the behaviour of micro and nanoparticles embedded in various matrices is totally different comparing to free micro and nanoparticles. Due to the change of volume during the transition, not only the spin crossover compound is influenced, but also the environment. Therefore, its eventual piezoelectric properties could be controlled by the state of spin crossover compound. The hypotheses suggested by some of our  preliminary results show that the effects could depend on the volume change of the particles, on elastic interactions between the particle and the molecules composing the matrices (as van der Waals forces) and on the properties of the matrix (rigidity, density, fragility, viscosity, relaxation dynamics etc)

MODx - Mollio