H2020Индивидуална стипендия2015–2017

COLPHAM · Collective Phenomena in dense Active Matter: phase transitions and non-equilibrium dynamics.

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2015-07-15 → 2017-08-13
Финансиране от ЕС: 158 122 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Колективното поведение на самодвижещи се частици, като бактерии или птици, се анализира чрез модели от статистическата механика. Разбирането на тези процеси помага за организирането на елементи в материалознанието и биологията по начини, които са невъзможни при пасивните системи.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Collective Phenomena in dense Active Matter: phase transitions and non-equilibrium dynamics.

The main goal of this project was to elucidate the general principles governing the collective behavior of self-propelled (or active) particles (i.e. any ‘biomimetic’ units able to convert energy into motion, like bacteria, birds or synthetic Janus colloids). Active matter, made of large assemblies of interacting active particles, evolves out-of-equilibrium, offering new promises in organizing elementary units at different scales in ways that are unreachable to traditional equilibrium passive systems. As such, the understanding of the emergent collective behavior of active systems has direct applications in a broad range of disciplines, ranging from material science and biology. The collective phenomena in active matter has been mostly understood in terms of simplified particle models using the framework of statistical mechanics, which allow to identify the key ingredients giving rise to such non-equilibrium behaviour. We followed this strategy in order to tackle the main objectives of the project: 1) To understand the phase behavior of self-propelled particles: Can we describe non-equilibrium phase transitions induced by self-propulsion in terms of equilibrium-like concepts? 2) How does an active fluid flow? 3) Can we use effective thermodynamic concepts to describe the dynamics of active systems? 4) How is the collective behavior of active matter affected by velocity alignment interactions? The project addressed all initial objectives and opened new directions of research that where not initially foreseen. Important new research results have been attained. We clarified the nature of several phase transitions in active systems, showing to what extent ideas from equilibrium systems can be borrowed to describe them. We elucidated the generic mechanisms by which self-propelled agents synchronize and found new routes for pattern formation. The project also allowed initiating collaborations with other academic institutions in the EU. The collaboration between the fellow (in Spain), its German and British partners initiated in the framework of the project, contributed to develop lasting relations and increase the scientific excellence of the fellow and the ERA. Overall, the completion of this project has advanced in the state-of-the-art by contributing with original results and has consolidated the fellow as a leading expert in the field.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The overall aim of the research activities presented in this proposal is to elucidate the general principles governing the physics of many-body systems of active particles when excluded-volume interactions compete with internal driving forces. We aim to reach a general understanding of this novel class of “active materials” and give an answer to the following question: How are the structure of the liquid and solid phases, and their mechanical response to an applied deformation, affected by self-propulsion? Statistical mechanics can efficiently deal with a broad class of soft matter systems at thermal equilibrium. However, active matter evolves in a non-equilibrium manner, as it is made of elements which have their own source of motion, which demands a new conceptual framework to describe it. By combining numerical simulations and theoretical analysis of model systems, we intend to get new quantitative predictions that can be tested experimentally in suspensions of self-propelled colloids, active emulsions or dense assemblies of cells, and exploit our results to design and characterise novel materials through collaboration with experimental groups. The completion of this programme will represent a major contribution into this fast-growing field with direct applications in materials science and biophysics: the engineering of synthetic materials that mimic the behaviour of living matter is a major challenge of current science and technology.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITAT DE BARCELONA · BarcelonaКоординаторИспания