Soft Matter emerging investigators 2017
This issue of Soft Matter highlights the work of emerging investigators in the field of soft matter. Dr Neil Hammond, Executive Editor of Soft Matter, introduces the issue.
Clogging of microfluidic systems
We review how micrometer-scale particles in suspension can form clogs in microfluidic systems and modify the fluid flow.
Ion specificities of artificial macromolecules
In this review, we discuss the ion specificities of artificial macromolecules based on direct and indirect ion–macromolecule interactions.
Chain conformations and phase behavior of conjugated polymers
Knowledge of the chain conformations and phase behavior of conjugated polymers is synthesized as starting points for better understanding the structure–property relationships of this class of materials.
Colloidal heat engines: a review
Stochastic heat engines can be built using colloidal particles trapped using optical tweezers.
Off-equilibrium surface tension in miscible fluids
When two miscible fluids are brought in contact, an effective off-equilibrium surface tension arises that controls the shape and the evolution of their interface. We review more than a century of investigations of the effective surface tension in molecular and complex fluids.
Active diffusion of model chromosomal loci driven by athermal noise
The active dynamics of chromosomes in living cells is investigated based on the notion of tension propagation.
Drop morphologies on flexible fibers: influence of elastocapillary effects
A drop of liquid deposited between two flexible fibers exerts a capillary force that leads to a collapsed state at small angle.
Shape oscillations of particle-coated bubbles and directional particle expulsion
Ultrasound waves drive shape oscillations of particle-coated microbubbles. During the ultrafast, non-uniform deformation of the interface, particles are expelled from the antinodes of the shape oscillations.
Dynamic dilution exponent in monodisperse entangled polymer solutions
We study the linear viscoelastic properties and the dilution effect of entangled linear chains diluted in oligomers or in real solvents.
Compression of hard core–soft shell nanoparticles at liquid–liquid interfaces: influence of the shell thickness
Hard core-soft shell nanoparticles show a rich structural behavior under compression when confined at a fluid interface and present crucial differences to fully deformable hydrogel particles.
Tunable hygromorphism: structural implications of low molecular weight gels and electrospun nanofibers in bilayer composites
Tunable hygromorphic responses achieved in bilayer composites derived from electrospun mats and low molecular weight gelators.
Thermoresponsive microgels at the air–water interface: the impact of the swelling state on interfacial conformation
Poly(N-vinylcaprolactam) (PVCL) is a new temperature-responsive type of polymer microgel with improved biocompatibility as compared to more commonly used poly(N-isopropylacrylamide) (PNIPAM).
Self-assembly of colloidal micelles in microfluidic channels
The self-assembly of amphiphilic Janus colloids in microfluidic channels under Poiseuille flow is studied using computer simulations. The aggregates grow in the weakly sheared channel center, whereas a distinct cluster breakup occurs in strongly sheared channel regions.
Dynamics of a microorganism in a sheared viscoelastic liquid
In this paper, we investigate the dynamics of a model spherical microorganism, called squirmer, suspended in a viscoelastic fluid undergoing unconfined shear flow.
Curing and viscoelasticity of vitrimers
Epoxy/carboxylic acid-based vitrimers relax stress in two steps.
Self-assembly of repulsive interfacial particles via collective sinking
We consider how interactions between many floating, electrically charged particles modify the interaction energy: interfacial deformations due to many particles are larger than those of an isolated particle. This leads to a larger binding energy than would be expected based on the pair-wise interaction potential.
Drainage dynamics of thin liquid foam films containing soft PNiPAM microgels: influence of the cross-linking density and concentration
We investigate the drainage dynamics of thin liquid foam films containing PNiPAM microgel suspensions with two cross-linking densities (1.5 and 5 mol% BIS) and at two microgel concentrations (0.1 and 1% wt).
Multiscale directed self-assembly of composite microgels in complex electric fields
Alternating complex electric fields were employed to direct the self-assembly of spherical and ellipsoidal composite microgels to create, among other structures, 2D hexagonal arrays of vertically aligned ellipsoidal particles and 3D rewritable structures.
Sub-nanometre mapping of the aquaporin–water interface using multifrequency atomic force microscopy
Multifrequency atomic force microscopy is used to gain sub-nanometre insights into the structure of aquaporin 0 and its interface with the surrounding water.
Sticking and sliding of lipid bilayers on deformable substrates
Supported lipid membranes exhibit two different stress response mechanisms to substrate deformation.
Thermodynamics and phase behavior of acid-tethered block copolymers with ionic liquids
Block copolymers carrying acid groups exhibited rich phase sequences with the addition of ionic liquid in which the cation/anion ratio in the ionic liquid exerted profound effects on the segregation strength and topology of the self-assembled structures.
Solvent vapor annealing in block copolymer nanocomposite films: a dynamic mean field approach
By employing a new computational framework, we show that the nanoparticle distribution after solvent annealing in block copolymer thin films depends on the solvent evaporation rate.
Cooperative strings in glassy nanoparticles
Motivated by recent experimental results on glassy polymer nanoparticles, we develop a minimal theoretical framework for the glass transition in spherical confinement.
Apparent contact angle and contact angle hysteresis on liquid infused surfaces
The apparent contact angle and contact angle hysteresis of a droplet on liquid infused surfaces have strong dependence on the relative size between the droplet and its surrounding wetting ridge.
Excitation of vibrational soft modes in disordered systems using active oscillation
We introduce a new method to excite a specific mode (left) as obtained in the normal mode analysis (right), but with much lower computational and memory costs.
Coalescence of electrically charged liquid marbles
We investigated the electro-coalescence of two liquid marbles and systematically characterized the effects of different operating parameters on it.
Topological structure prediction in binary nanoparticle superlattices
Systems of spherical nanoparticles with capping ligands have been shown to self-assemble into beautiful superlattices of fascinating structure and complexity.