Phase diagram of inverse patchy colloids assembling into an equilibrium laminar phase

Soft Matter ◽  
2014 ◽  
Vol 10 (42) ◽  
pp. 8464-8474 ◽  
Author(s):  
Eva G. Noya ◽  
Ismene Kolovos ◽  
Günther Doppelbauer ◽  
Gerhard Kahl ◽  
Emanuela Bianchi
Keyword(s):  
Phase Diagram ◽  
Phase Behavior ◽  
Colloidal Particles ◽  
Equatorial Belt ◽  
Patchy Colloids ◽  
Oppositely Charged

We numerically study the phase behavior of colloidal particles with two charged patches at the poles and an oppositely charged equatorial belt.

Phase behavior of a binary mixture of patchy colloids: Effect of particle size and gravity

2021 ◽  
Vol 155 (4) ◽  
pp. 044903
Author(s):  
Rodrigo Braz Teixeira ◽  
Daniel de las Heras ◽  
José Maria Tavares ◽  
Margarida M. Telo da Gama
Keyword(s):  
Particle Size ◽  
Binary Mixture ◽  
Phase Behavior ◽  
Effect Of Particle Size ◽  
Patchy Colloids

Induced asymmetries in the heteroaggregation of oppositely charged colloidal particles

2003 ◽  
Vol 265 (1) ◽  
pp. 36-43 ◽  
Author(s):  
Antonio M Puertas ◽  
A Fernández-Barbero ◽  
F.J de las Nieves
Keyword(s):  
Colloidal Particles ◽  
Oppositely Charged

A simple simulation model for complex coacervates

Soft Matter ◽  
2021 ◽  
Author(s):  
Sai Vineeth Bobbili ◽  
Scott Milner
Keyword(s):  
Phase Diagram ◽  
Aqueous Solution ◽  
Phase Separation ◽  
Simulation Model ◽  
Simple Simulation ◽  
The Impact ◽  
Oppositely Charged

When oppositely charged polyelectrolytes mix in an aqueous solution, associative phase separation gives rise to coacervates. Experiments reveal the phase diagram for such coacervates, and determine the impact of charge...

scholarly journals Phase Behavior of Melts of Diblock-Copolymers with One Charged Block

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1027 ◽  
Author(s):  
Alexey A. Gavrilov ◽  
Alexander V. Chertovich ◽  
Igor I. Potemkin
Keyword(s):  
Phase Diagram ◽  
Phase Behavior ◽  
Electrostatic Interactions ◽  
Diblock Copolymers ◽  
Volume Fraction ◽  
Microphase Separation ◽  
Dissipative Particle Dynamics ◽  
Homogeneous Structure ◽  
Electrostatic Energy ◽  
Ordered Structures

In this work, we investigated the phase behavior of melts of block-copolymers with one charged block by means of dissipative particle dynamics with explicit electrostatic interactions. We assumed that all the Flory–Huggins χ parameters were equal to 0. We showed that the charge- correlation attraction solely can cause microphase separation with a long-range order; a phase diagram was constructed by varying the volume fraction of the uncharged block and the electrostatic interaction parameter λ (dimensionless Bjerrum length). The obtained phase diagram was compared to the phase diagram of “equivalent” neutral diblock-copolymers with the non-zero χ-parameter between the beads of different blocks. The neutral copolymers were constructed by grafting the counterions to the corresponding co-ions of the charged block with further switching off the electrostatic interactions. Surprisingly, the differences between these phase diagrams are rather subtle; the same phases in the same order are observed, and the positions of the order-disorder transition ODT points are similar if the λ-parameter is considered as an “effective” χ-parameter. Next, we studied the position of the ODT for lamellar structure depending on the chain length N. It turned out that while for the uncharged diblock copolymer the product χcrN was almost independent of N, for the diblock copolymers with one charged block we observed a significant increase in λcrN upon increasing N. This can be attributed to the fact that the counterion entropy prevents the formation of ordered structures, and its influence is more pronounced for longer chains since they undergo the transition to ordered structures at smaller values of λ, when the electrostatic energy becomes comparable to kbT. This was supported by studying the ODT in diblock-copolymers with charged blocks and counterions cross-linked to the charged monomer units. The ODT for such systems was observed at significantly lower values of λ, with the difference being more pronounced at longer chain lengths N. The fact that the microphase separation is observed even at zero Flory–Huggins parameter can be used for the creation of “high-χ” copolymers: The incorporation of charged groups (for example, ionic liquids) can significantly increase the segregation strength. The diffusion of counterions in the obtained ordered structures was studied and compared to the case of a system with the same number of charged groups but a homogeneous structure; the diffusion coefficient along the lamellar plane was found to be higher than in any direction in the homogeneous structure.

Phase behavior of AB/CD diblock copolymer blends via coarse-grained simulation

Soft Matter ◽  
2020 ◽  
Vol 16 (12) ◽  
pp. 3069-3081
Author(s):  
Iman Ahmadian ◽  
Andrew J. Peters
Keyword(s):  
Phase Diagram ◽  
Phase Behavior ◽  
Diblock Copolymer ◽  
Coarse Grained ◽  
Copolymer Blends

A–B/C–D diblock copolymer blends with negative χBC were investigated using DPD. Novel morphologies were found and a phase diagram produced.

Self-assembly and phase behavior of mixed patchy colloids with any bonding site geometry: theory and simulation

Soft Matter ◽  
2020 ◽  
Vol 16 (15) ◽  
pp. 3806-3820 ◽  
Author(s):  
Yiwei Zhu ◽  
Artee Bansal ◽  
Shun Xi ◽  
Jinxin Lu ◽  
Walter G. Chapman
Keyword(s):  
Phase Behavior ◽  
Self Assembly ◽  
Novel Theory ◽  
Patchy Colloids ◽  
Bonding Site

Novel theory incorporating multibody correlations accurately predicts aggregation and phase behavior in mixed Janus, Saturn ring, and Ternary patchy colloids.

scholarly journals Phase behavior of mixtures of oppositely charged protein nanoparticles at asymmetric charge ratios

2006 ◽  
Vol 73 (4) ◽  
Author(s):  
P. Maarten Biesheuvel ◽  
Saskia Lindhoud ◽  
Martien A. Cohen Stuart ◽  
Renko de Vries
Keyword(s):  
Phase Behavior ◽  
Protein Nanoparticles ◽  
Oppositely Charged
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