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Active topological defects in dense 2D systems

Project description

Investigating defect behavior in dense active matter

Defect behaviour in 2D materials holds the key to understanding many natural and technological processes. These points, where the material’s usual order breaks down, are not mere imperfections but actively affect melting (where a solid transitions to a liquid) and structural changes. When energy is continuously supplied in active matter systems, including living cells or synthetic particles, defects exhibit entirely new dynamics that challenge traditional theories. Active hexatic phases, a state of matter existing between solid and liquid phases, are particularly intriguing. Supported by the Marie Skłodowska-Curie Actions programme, the AcTiDeNS project aims to decode the complex defect behaviour in these systems. The proposed research will offer new insights that could transform material design and deepen understanding of collective dynamics in biological tissues.

Objective

Two-dimensional (2D) materials are at the heart of modern science and technology, from advanced electronic devices to biological tissues. In these systems, unusual phases of matter emerge, where the key players are topological defects, singular points where the local order breaks down. Far from being mere imperfections, defects control fundamental processes such as melting and structural transitions. In parallel, active matter, systems of particles that consume energy to move, such as synthetic colloids or living cells, plays as central to the science of complex systems. Active 2D materials can also exhibit topological phases, but continuous energy input drives novel dynamics and defect behaviors that cannot be explained by equilibrium theories. Understanding these behaviors is a pressing challenge, with implications for designing smart defect-engineered materials and for interpreting biological processes such as tissue remodeling.
This project will tackle this challenge by provide a quantitative framework to describe topological defects in active hexatic phases, a poorly understood but widely observed state of matter. Combining advanced simulations, statistical physics, and analytical modelling, it aims at delivering the first quantitative and testable description of defect dynamics in active hexatics, bridging microscopic physics with macroscopic behavior. Beyond advancing fundamental knowledge of non-equilibrium phase transitions, the project will open avenues toward defect-based design of new smart materials and provide fresh tools to understand collective dynamics in biological tissues.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2025-PF

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Coordinator

UNIVERSITAT DE BARCELONA
Net EU contribution
€ 194 074,56
Address
GRAN VIA DE LES CORTS CATALANES 585
08007 Barcelona
Spain
Region
Este Cataluña Barcelona
Activity type
Higher or Secondary Education Establishments
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Total cost
No data