Interconvertible Self-Assembly and Rheological Properties of Planar Bilayers and Vesicle Gels in Anionic/Nonionic (CF/CH) Surfactant Solutions

Abstract We use computer simulations to study the morphology and rheological properties of a bidimensional emulsion resulting from a mixture of a passive isotropic fluid and an active contractile polar gel, in the presence of a surfactant that favours the emulsification of the two phases. By varying the intensity of the contractile activity and of an externally imposed shear flow, we find three possible morphologies. For low shear rates, a simple lamellar state is obtained. For intermediate activity and shear rate, an asymmetric state emerges, which is characterized by shear and concentration banding at the polar/isotropic interface. A further increment in the active forcing leads to the self-assembly of a soft channel where an isotropic fluid flows between two layers of active material. We characterize the stability of this state by performing a dynamical test varying the intensity of the active forcing and shear rate. Finally, we address the rheological properties of the system by measuring the effective shear viscosity, finding that this increases as active forcing is increased—so that the fluid thickens with activity.

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Understanding Self-assembly, Colloidal Behavior and Rheological Properties of Graphene Derivatives for High-performance Supercapacitor Fabrication

Chinese Journal of Polymer Science ◽

10.1007/s10118-020-2411-0 ◽

2020 ◽

Vol 38 (5) ◽

pp. 423-434 ◽

Cited By ~ 3

Author(s):

Xia-Wei Yun ◽

Bo Tang ◽

Zhi-Yuan Xiong ◽

Xiao-Gong Wang

Keyword(s):

Rheological Properties ◽

Self Assembly ◽

High Performance ◽

Graphene Derivatives ◽

Colloidal Behavior

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Aggregation behavior of tetraphenylporphyrin in aqueous surfactant solutions: Chiral premicellar J-aggregate formation

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424615500595 ◽

2015 ◽

Vol 19 (07) ◽

pp. 845-851 ◽

Cited By ~ 2

Author(s):

Margaret A. Gradova ◽

Vladimir V. Artemov ◽

Anton V. Lobanov

Keyword(s):

Anionic Surfactant ◽

Self Assembly ◽

Photophysical Properties ◽

Direct Synthesis ◽

Aggregate Formation ◽

Experimental Conditions ◽

Aggregation State ◽

Supramolecular Chirality ◽

Surfactant Solutions ◽

Surfactant Interactions

Porphyrin-surfactant interactions in aqueous solutions are known to result in the selfassembly of various supramolecular structures, including pigment-surfactant complexes, J- and H-aggregates, and solubilized dye species. Detailed studies on the mechanisms of the intermolecular interactions governing the above self-assembly processes allow to predict the aggregation state and hence, the photophysical properties of the dye-surfactant assemblies in order to perform a direct synthesis of the desired porphyrin-based nanostructures at the appropriate experimental conditions. This paper describes a novel example of the surfactant-induced J-aggregate formation from the diprotonated hydrophobic tetraphenylporphyrin species in submicellar aqueous anionic surfactant solutions. The above assemblies are characterized by a rod-like morphology and possess supramolecular chirality according to the CD measurements.

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Landau model for self-assembly and liquid crystal formation in surfactant solutions

Liquid Crystals ◽

10.1080/02678299208030697 ◽

1992 ◽

Vol 11 (6) ◽

pp. 941-947 ◽

Cited By ~ 4

Author(s):

M. A. Anisimov ◽

E. E. Gorodetsky ◽

A. J. Davydov ◽

A. S. Kurliandsky

Keyword(s):

Liquid Crystal ◽

Self Assembly ◽

Crystal Formation ◽

Landau Model ◽

Surfactant Solutions

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Surfactant Self-Assemblies Near Contact Lines and their Effect on Wetting by Surfactant Solutions

MRS Proceedings ◽

10.1557/proc-366-39 ◽

1994 ◽

Vol 366 ◽

Author(s):

B. Frank ◽

S. Garoff

Keyword(s):

Pattern Formation ◽

Contact Line ◽

Self Assembly ◽

Surface Interactions ◽

Contact Lines ◽

Dynamic Wetting ◽

Wetting Behavior ◽

Wetting Properties ◽

Surfactant Solutions ◽

Solid Liquid

ABSTRACTSurfactant self-assembly at the liquid-vapor, solid-liquid, and solid-vapor interfaces controls the wetting behavior of advancing surfactant solutions. While different surfactants exhibit different static and dynamic wetting properties, we show that these behaviors can be understood through an examination of microscopic structures driven by surfactant-surface interactions. We examine surfactant solutions exhibiting complete and partial static wetting as well as spreading by dendritic pattern formation and unsteady, stick-jump behavior. In each case, the observed behavior is related to the structure of the surfactant assemblies in the vicinity of the contact line.

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