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Effect of copolymer sequence on structure and relaxation times near a nanoparticle surface

03.07.2018 | Alex Trazkovich; Mitchell Wendt; Lisa Hall, Soft Matter, 2018

We simulate a simple nanocomposite consisting of a single spherical nanoparticle surrounded by coarse-grained polymer chains. The polymers are composed of two different monomer types that differ only in their interaction strengths with the nanoparticle. We examine the effect of adjusting ...


Spin-coating-assisted fabrication of ultrathin physical hydrogel films with high toughness and fast response

03.07.2018 | Si Yu Zheng; Ye Tian; Xin Ning Zhang; Miao Du; Yihu Song; Zi Liang Wu; Qiang Zheng, Soft Matter, 2018

Hydrogel films have promising applications in medical dressings, flexible electronics, etc. However, it is challenging to fabricate ultrathin hydrogel films with high toughness and controllable thickness. Here, we report a facile approach to prepare tough physical hydrogel films by spin-coating ...


Change in collective motion of colloidal particles driven by optical vortex with driving force and spatial confinement

03.07.2018 | Keita Saito; Shogo Okubo; Yasuyuki Kimura, Soft Matter, 2018

We studied the change in collective behavior of optically driven colloidal particles on a circular path. The particles are simultaneously driven by the orbital angular momentum of an optical vortex beam generated by a holographic optical tweezer. The driving force is controlled by the topological ...


A thermoresponsive dynamic polymer brush fabricated by the segregation of amphiphilic diblock copolymers

03.07.2018 | Hirokazu Tanoue; Kazuma Inoue; Norifumi L. Yamada; Kohzo Ito; Syo Miyao; Takashi Ishizone; Hideaki Yokoyama, Soft Matter, 2018

A highly dense polymer brush was previously fabricated by the spontaneous segregation of amphiphilic diblock copolymers in an elastomer matrix into water and a hydrophobic polymer interface and named a ‘dynamic polymer brush’. We fabricated a lower critical solution temperature (LCST)-type ...


Diffusiophoretically induced interactions between chemically active and inert particles

03.07.2018 | Shang-Yik Reigh; Prabha Chuphal; Snigdha Thakur; Raymond Kapral, Soft Matter, 2018

In the presence of a chemically active particle, a nearby chemically inert particle can respond to a concentration gradient and move by diffusiophoresis. The nature of the motion is studied for two cases: first, a fixed reactive sphere and a moving inert sphere, and second, freely moving reactive ...


A dual pH-responsive supramolecular gelator with aggregation-induced emission properties

03.07.2018 | Marlen Externbrink; Steffen Riebe; Carsten Schmuck; Jens Voskuhl, Soft Matter, 2018

Functionalising AIE-active aromatic thioethers with self-complementary zwitterionic binding sites leads to a dual pH-responsive supramolecular organogelator with aggregation-induced emission (AIE) properties. The self-assembled fibrillar gel network is highly fluorescent (λem = 490 nm), whereas ...


Phase separation in binary mixtures of active and passive particles

03.07.2018 | Pritha Dolai; Aditi Simha; Shradha Mishra, Soft Matter, 2018

We study binary mixtures of small active and big passive athermal particles interacting via soft repulsive forces on a frictional substrate. Athermal self propelled particles are known to phase separate into a dense aggregate and a dilute gas-like phase at fairly low packing fractions. Known as ...


Spontaneous domain formation in disordered copolymers as a mechanism for chromosome structuring

03.07.2018 | Matteo Negri; Marco Gherardi; Guido Tiana; Marco Cosentino Lagomarsino, Soft Matter, 2018

Motivated by the problem of domain formation in chromosomes, we studied a co--polymer model where only a subset of the monomers feel attractive interactions. These monomers are displaced randomly from a regularly-spaced pattern, thus introducing some quenched disorder in the system. Previous work ...


Correlation between grafted nanoparticle-matrix polymer interface wettability and slip in polymer nanocomposites.

03.07.2018 | Mohd Ibrahim; Nafisa Begam; Venkat Padmanabhan; Jaydeep Kumar Basu, Soft Matter, 2018

Controlling and understanding the flow properties of polymer nanocomposites (PNC) is very important in realising their potential for various applications. In this study we report molecular dynamics simulation studies of slip between a rotating polymer-grafted nanoparticle and the surrounding free ...


Impact of “half-crown/two carbonyl” - Ca2+ Metal Ion Interactions of a Low Molecular Weight Gelator (LMWG) on its Fiber to Nanosphere Morphology Transformation with Gel-to-Sol Phase Transition.

03.07.2018 | Arunava Maity; Ananta Dey; Mrinal Kanti Si; Bishwajit Ganguly; Amitava Das, Soft Matter, 2018

We report here a smart functional low molecular weight gelator (LMWG) L, containing unusual metal ion coordination site, i.e. “half-crown/two carbonyl”. The gelator L shows excellent gelation behavior with typical fibrillar morphology in acetonitrile, methanol and ethanol medium. Upon Ca2+ ion ...


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