pH-dependent self-assembly of EAK16 peptides in the presence of a hydrophobic surface: Coarse-grained molecular dynamics simulation

Soft Matter ◽  
2014 ◽  
Vol 10 (24) ◽  
pp. 4248 ◽  
Author(s):  
Soheila Emamyari ◽  
Hossein Fazli
Author(s):  
Maziar Fayaz-Torshizi ◽  
Erich A. Müller

A methodology is outlined to parametrize coarse grained molecular models for the molecular dynamics simulation of liquid crystals.


2018 ◽  
Vol 20 (41) ◽  
pp. 26422-26430 ◽  
Author(s):  
Sílvia Illa-Tuset ◽  
David C. Malaspina ◽  
Jordi Faraudo

We study surfactant molecules at interfaces, micelles and their self-assembly with different models (all atomic and coarse grained).


2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Dwi Hudiyanti ◽  
Muhammad Radifar ◽  
Tri Joko Raharjo ◽  
Narsito Narsito ◽  
Sri Noegrohati

The energy profile of self-assembly process of DLPE, DLPS, DOPE, DOPS, DLiPE, and DLiPS in water was investigated by a coarse-grained molecular dynamics simulation using NAMD package. The self-assembly process was initiated from random configurations. The simulation was carried out for 160 ns. This study presented proof that there were three major self-assembled arrangements which became visible for a certain duration when the simulation took place, that is, liposome, deformed liposome, and planar bilayer. The energy profile that shows plateau at the time of these structures emerge confirmed their stability therein. Our findings have highlighted the idea that liposomes and deformed liposomes are metastable phases which eventually will turn into planar bilayer, the stable one.


Molecules ◽  
2018 ◽  
Vol 23 (4) ◽  
pp. 969 ◽  
Author(s):  
Mariana Elizondo-García ◽  
Valeria Márquez-Miranda ◽  
Ingrid Araya-Durán ◽  
Jesús Valencia-Gallegos ◽  
Fernando González-Nilo

2011 ◽  
Vol 39 (1) ◽  
pp. 44-58 ◽  
Author(s):  
Y. Masumoto ◽  
Y. Iida

Abstract The purpose of this work is to develop a new analytical method for simulating the microscopic mechanical property of the cross-linked polymer system using the coarse-grained molecular dynamics simulation. This new analytical method will be utilized for the molecular designing of the tire rubber compound to improve the tire performances such as rolling resistance and wet traction. First, we evaluate the microscopic dynamic viscoelastic properties of the cross-linked polymer using coarse-grained molecular dynamics simulation. This simulation has been conducted by the coarse-grained molecular dynamics program in the OCTA) (http://octa.jp/). To simplify the problem, we employ the bead-spring model, in which a sequence of beads connected by springs denotes a polymer chain. The linear polymer chains that are cross-linked by the cross-linking agents express the three-dimensional cross-linked polymer network. In order to obtain the microscopic dynamic viscoelastic properties, oscillatory deformation is applied to the simulation cell. By applying the time-temperature reduction law to this simulation result, we can evaluate the dynamic viscoelastic properties in the wide deformational frequency range including the rubbery state. Then, the stress is separated into the nonbonding stress and the bonding stress. We confirm that the contribution of the nonbonding stress is larger at lower temperatures. On the other hand, the contribution of the bonding stress is larger at higher temperatures. Finally, analyzing a change of microscopic structure in dynamic oscillatory deformation, we determine that the temperature/frequency dependence of bond stress response to a dynamic oscillatory deformation depends on the temperature dependence of the average bond length in the equilibrium structure and the temperature/frequency dependence of bond orientation. We show that our simulation is a useful tool for studying the microscopic properties of a cross-linked polymer.


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