Scientific Highlights from Network Area 4 Archives - Page 3 of 6

2022-03-11T17:40:44+01:000000004431202203

Figure 2: Membrane deformations induced by actin assembly. A membrane bilayer (pink) constituting an initially spherical liposome is deformed through the growth of a branched actin network (blue marks the colour of the end of actin filaments) at its surface. Spikes (inward) and tubes (outward) are formed during this process. Note that compared to the cell geometry, the geometry here is inside out, as the ingredients of the cytoskeleton are outside the liposome. Bar 5 μm. Copyright: Cécile Sykes, CNRS

2022-03-11T17:40:44+01:000000004431202203

How Active Biopolymer Networks Shape the Cell Membrane

Experiments on active deformations of a cell membrane by an actin assembly may inspire new materials and approaches. Cécile Sykes from the Laboratoire de Physique de l‘Ecole Normale Supérieure reports on results raising... (Read more)

2022-03-09T14:59:42+01:000000004231202203

$Figure 1: Simulated state diagram illustrating various membrane structures for different Peclet numbers (Pe) characterizing particle propulsion strength and volume fractions (ϕ) of active particles. The three main regimes are tethering (red symbols), fluctuating (blue symbols) and bola/prolate (brown symbols) vesicle shapes. Each dot containing a grid pattern indicates the position of the nearest snapshot within the shape diagram. Simulations mimic a nearly tensionless flaccid vesicle. Copyright: authors$

2022-03-09T14:59:42+01:000000004231202203

From Soft Active Systems to Synthetic Cells

Scientists from the ETH Zurich and Forschungszentrum Jülich highlight their recent collaborative study on a novel active system of self-propelled particles (SPPs) enclosed in a lipid vesicle, which exhibits dramatic shape changes resembling... (Read more)

2022-03-08T18:48:58+01:000000005831202203

The new concept makes it possible to induce complex behaviour in adaptive and communicating soft matter microsystems. Copyright: Avik Samanta

2022-03-08T18:48:58+01:000000005831202203

Towards the Minimalistic Design of Life-like Abiotic Systems

We unravelled polymer-like phase-separation behaviour in multiblock single-stranded DNA which provides an opportunity to fabricate all-DNA protocells with several encoded sequences for post-functionalization with spatio-temporal... (Read more)

2021-11-19T17:56:35+01:000000003530202111

Visualization of the exchange mechanism of telechelic chains in flower-like micelles via a sequence of consecutive equilibrium steps. Diffusion of free telechelic chains is excluded. Reprinted with permission from König N. et al., Phys. Rev. Lett. 124, 197801 (2020). Copyright 2020 by the American Physical Society.

2021-11-19T17:56:35+01:000000003530202111

Molecular Exchange of Telechelic Polymer Micelles

Telechelic polymers encompass many interesting aspects of soft matter physics – including hierarchical self-assembly, non-Newtonian flow behaviour, and colloidal interactions. Furthermore, they are important as associative thickeners in products used in daily life... (Read more)