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Modeling self-assembly of the surfactants into biological bilayer membranes with special chemical structures using dissipative particle dynamics method

Yaghoubi, S ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. Publisher: Sharif University of Technology , 2016
  3. Abstract:
  4. The aim of this study is to simulate the self-assembly of the surfactant molecules with special chemical structure and bending stiffiness into bilayer membranes using a mesoscopic Dissipative Particle Dynamics (DPD) method. The surfactants are modeled with special chemical structure and bending stiffiness. To confirm that the novel model is physical, we determine the interaction parameters based on matching the compressibility and solubility of the DPD system with real physics of the uid. To match the mutual solubility for binary uids, we use the relation between DPD parameters and x-parameters in Flory-Huggins-type models. Unsaturated bonds can change the stiffiness of a lipid membrane, which is modeled by introducing a bond bending potential. To verify our model, we investigate the effiect of surfactant structure, like chain length and stiffiness of the molecules, on the properties of the modeled membrane as area per surfactant. To validate our results, we also compare them with the theoretical calculations as well as with the experimental and other existing simulations results. We show that there is a good coincidence between all of the results
  5. Keywords:
  6. Biological membrane ; DPD ; Flory-Huggins parameters ; Lipid bilayer ; Biological membranes ; Cytology ; Lipid bilayers ; Membranes ; Molecules ; Solubility ; Structure (composition) ; Stiffness ; Dissipative particle dynamics method ; Dissipative particle dynamics method (DPD) ; Flory-Huggins parameter ; Flory-Huggins-type models ; Interaction parameters ; Surfactant molecules ; Surfactant structure ; Theoretical calculations ; Self assembly ; Surface active agents
  7. Source: Scientia Iranica ; Volume 23, Issue 3 , 2016 , Pages 942-950 ; 10263098 (ISSN)
  8. URL: http://www.scientiairanica.com/en/ManuscriptDetail?mid=2560