Morphology of active deformable 3D droplets on ArXiv

Morphology of active deformable 3D droplets
Liam J. Ruske, Julia M. Yeomans
arXiv: 2010.10427

We numerically investigate the morphology and disclination line dynamics of active nematic droplets in three dimensions. Although our model only incorporates the simplest possible form of achiral active stress, active nematic droplets display an unprecedented range of complex morphologies. For extensile activity finger-like protrusions grow at points where disclination lines intersect the droplet surface. For contractile activity, however, the activity field drives cup-shaped droplet invagination, run-and-tumble motion or the formation of surface wrinkles. This diversity of behaviour is explained in terms of an interplay between active anchoring, active flows and the dynamics of the motile dislocation lines. We discuss our findings in the light of biological processes such as morphogenesis, collective cancer invasion and the shape control of biomembranes, suggesting that some biological systems may share the same underlying mechanisms as active nematic droplets.

ActiveMatter PIs+ESRs Online Meeting on 10 September 2020

The ActiveMatter PI+ESRs meeting took place on 10 September 2020. Because of the current travel restrictions and regulations imposed to hinder the spread of the CoViD-19 epidemics, the meeting was held online.

The aim of the meeting was to give an update to all the members on the progress of the ActiveMatter network.

Currently 12 of the 15 Early Stage Researchers (ESRs) have already been recruited and could started their project. During the meeting the ESRs had the opportunity to introduce themselves to the rest of the network and to present their research project.

The presentations of the ESRs have been uploaded on the Youtube channel of the ActiveMatter network and are available online.

Links to the individual presentations:
Liam Ruske, UOXF
Carolina van Baalen, ETH
Audrey Nsamela, ELVESYS
Danne van Roon, FC.ID
Chun-Jen Chen, UKONS
Sandrine Heijnen, UCL
Jesús Manuel Antúnez Dominguez, ELVESYS
David Bronte Ciriza, CNR
Laura Natali, UGOT
Ayten Gülce Bayram, UBIL
Davide Breoni, UDUS
Jérémie Mar Bertrand, EPFL

Pictures
(Screenshot by Caroline Beck Adiels)

(Screenshot by Giorgio Volpe)

(Screenshot by Giorgio Volpe)

(Screenshot by Agnese Callegari)

(Screenshot by Agnese Callegari)

Jérémie Marc Bertrand joins the ActiveMatter ITN

Jérémie Marc Bertrand started his training at EPFL in Lausanne as one of the Early Stage Researchers (ESRs) of ActiveMatter ITN.

His work focuses on the mechanisms and the scaling properties of artificial nano-swimmers that navigate using phoretic self-propulsion.

He will conduct his research under the supervision of Prof. Ignacio Pagonabarraga.

David Bronte Ciriza joins the ActiveMatter ITN

David Bronte Ciriza started his training at CNR-IPCF Messina as one of the Early Stage Researchers (ESRs) of ActiveMatter ITN.

His work focuses on understanding the dynamics of artificial swimmers in optical tweezers, both theoretically and experimentally.

He will conduct his research under the supervision of Dr. Maria Antonia Iatì and Dr. Onofrio Maragò.

Davide Breoni joins the ActiveMatter ITN

Davide Breoni started his PhD program in Physics at the University of Dusseldorf as one of the Early Stage Researchers (ESRs) of the ActiveMatter ITN.

His work will focus on modeling and simulating the dynamics of mixtures of active and passive particles in evaporating droplets.

He will conduct his research under the supervision of Prof. Hartmut Löwen.

Jesús Manuel Antúnez Domínguez joins the ActiveMatter ITN

Jesús Manuel Antúnez Domínguez started his training at Elvesys as one of the Early Stage Researchers (ESRs) of ActiveMatter ITN.

His work focuses on characterizing active matter in micro-chambers.

He will conduct his research under the supervision of Aurélie Vigne at Elvesys, and co-supervised by Dr. Caroline Adiels at the University of Gothenburg.