Description du projet
La recherche pourrait nous en dire plus sur la structure et la dynamique du verre
Le verre est omniprésent dans notre quotidien, mais la compréhension actuelle de sa structure et de sa dynamique demeure très limitée. L’absence d’un ordre à longue portée entrave la caractérisation complète de sa structure microscopique, alors qu’il présente également une hétérogénéité dynamique. Financé par le programme Actions Marie Skłodowska-Curie, le projet GlassX utilisera les techniques de diffraction des rayons X et de spectroscopie de corrélation de photons aux rayons X pour étudier de manière exhaustive les propriétés structurelles et dynamiques des verres métalliques déposés en phase vapeur. Plus particulièrement, il se concentrera sur le degré d’anisotropie locale, sur la relation entre leur structure et leur stabilité et sur les hétérogénéités dynamiques.
Objectif
Glasses are ubiquitous in our daily lives, yet the current understanding of them is very limited. Despite decades of research, the structure and dynamics of glasses and the nature of the glass transition remain open problems in condensed matter physics. To a large extent, this is due to the intrinsic properties of glasses: they lack long-range order, which makes it difficult to fully characterise their microscopic structures; they are out-of-equilibrium by nature, which leads to temporally evolving and spatially heterogeneous dynamics. With the advent of a new generation of X-ray sources and the development of novel X-ray technologies, these challenges can now be addressed. The GlassX action thus aims at exploiting these new opportunities to significantly better our understanding of glasses. The action is divided into four parts, each addressing an important open question in glass physics. Parts 1 and 2 focus on structural properties of vapor-deposited metallic glasses, including the degree of local anisotropy and the relation between their structure and stability. Parts 3 and 4 concentrate on the dynamics of glasses, including the wave-vector dependence and the existence of dynamic heterogeneities. These projects will make use of X-ray nano-diffraction and X-ray photon correlation spectroscopy techniques, both of which will see significant improvements with the newly available fourth-generation X-ray sources, making it possible to reach previously unexplored length and time scales. The knowledge generated by the action will contribute substantially to the field of glasses, both from the aspect of basic science and in terms of possible applications. Dissemination of the results will also be an integral part of the action, with the goal to effectively communicate the research outcome and its relevance to audiences both within and outside academia.
Champ scientifique
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Régime de financement
MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)Coordinateur
35122 Padova
Italie