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Yu S, Zhao J, Chu R, Li X, Wu G, Meng X. Anomalous Diffusion of Polyelectrolyte Segments on Supported Charged Lipid Bilayers. ENTROPY (BASEL, SWITZERLAND) 2023; 25:e25050796. [PMID: 37238551 DOI: 10.3390/e25050796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/04/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023]
Abstract
This work provides mesoscale models for the anomalous diffusion of a polymer chain on a heterogeneous surface with rearranging randomly distributed adsorption sites. Both the "bead-spring" model and oxDNA model were simulated on supported lipid bilayer membranes with various molar fractions of charged lipids, using Brownian dynamics method. Our simulation results demonstrate that "bead-spring" chains exhibit sub-diffusion on charged lipid bilayers which agrees with previous experimental observations for short-time dynamics of DNA segments on membranes. In addition, the non-Gaussian diffusive behaviors of DNA segments have not been observed in our simulations. However, a simulated 17 base pairs double stranded DNA, using oxDNA model, performs normal diffusion on supported cationic lipid bilayers. Due to the number of positively charged lipids attracted by short DNA is small, the energy landscape that the short DNA experiences during diffusion is not as heterogeneous as that experienced by long DNA chains, which results in normal diffusion rather than sub-diffusion for short DNA.
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Affiliation(s)
- Shi Yu
- Department of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
| | - Jianqiao Zhao
- Department of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
| | - Ruizhi Chu
- Department of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
- Key Laboratory of Coal-Based CO2 Capture and Geological Storage, China University of Mining & Technology, Xuzhou 221116, China
| | - Xiao Li
- Department of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
- Key Laboratory of Coal-Based CO2 Capture and Geological Storage, China University of Mining & Technology, Xuzhou 221116, China
| | - Guoguang Wu
- Department of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
- Key Laboratory of Coal-Based CO2 Capture and Geological Storage, China University of Mining & Technology, Xuzhou 221116, China
| | - Xianliang Meng
- Department of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
- Key Laboratory of Coal-Based CO2 Capture and Geological Storage, China University of Mining & Technology, Xuzhou 221116, China
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Feng GQ, Tian WD. Desorption of a Flexible Polymer with Activity from a Homogeneous Attractive Surface. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c01907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Affiliation(s)
- Guo-qiang Feng
- Center for Soft Condensed Matter Physics & Interdisciplinary Research, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu 215006, China
| | - Wen-de Tian
- Center for Soft Condensed Matter Physics & Interdisciplinary Research, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu 215006, China
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Qi HK, Yang X, Yang QH, Luo MB. Effect of grafting density on the adsorption of end-grafted polymer chains. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Yang Q, Qi H, Yang X, Luo M, Huang J. Simulation study on the adsorption of polymer chains on checkerboard‐patterned surfaces. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20220321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Qing‐Hui Yang
- Department of Physics Hangzhou Dianzi University Hangzhou China
| | - Hang‐Kai Qi
- Department of Physics Zhejiang University Hangzhou China
| | - Xiao Yang
- Department of Physics Taizhou University Taizhou China
| | - Meng‐Bo Luo
- Department of Physics Zhejiang University Hangzhou China
| | - Jian‐Hua Huang
- Department of Chemistry Zhejiang Sci‐Tech University Hangzhou China
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Bačová P, Li W, Behbahani AF, Burkhart C, Polińska P, Doxastakis M, Harmandaris V. Coupling between Polymer Conformations and Dynamics Near Amorphous Silica Surfaces: A Direct Insight from Atomistic Simulations. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2075. [PMID: 34443909 PMCID: PMC8401719 DOI: 10.3390/nano11082075] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 11/17/2022]
Abstract
The dynamics of polymer chains in the polymer/solid interphase region have been a point of debate in recent years. Its understanding is the first step towards the description and the prediction of the properties of a wide family of commercially used polymeric-based nanostructured materials. Here, we present a detailed investigation of the conformational and dynamical features of unentangled and mildly entangled cis-1,4-polybutadiene melts in the vicinity of amorphous silica surface via atomistic simulations. Accounting for the roughness of the surface, we analyze the properties of the polymer chains as a function of their distance from the silica slab, their conformations and the chain molecular weight. Unlike the case of perfectly flat and homogeneous surfaces, the monomeric translational motion parallel to the surface was affected by the presence of the silica slab up to distances comparable with the extension of the density fluctuations. In addition, the intramolecular dynamical heterogeneities in adsorbed chains were revealed by linking the conformations and the structure of the adsorbed chains with their dynamical properties. Strong dynamical heterogeneities within the adsorbed layer are found, with the chains possessing longer sequences of adsorbed segments ("trains") exhibiting slower dynamics than the adsorbed chains with short ones. Our results suggest that, apart from the density-dynamics correlation, the configurational entropy plays an important role in the dynamical response of the polymers confined between the silica slabs.
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Affiliation(s)
- Petra Bačová
- Institute of Applied and Computational Mathematics (IACM), Foundation for Research and Technology Hellas (FORTH), GR-70013 Heraklion, Greece;
- Computation-Based Science and Technology Research Center, The Cyprus Institute, 20 Constantinou Kavafi Str., Nicosia 2121, Cyprus
| | - Wei Li
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA; (W.L.); (M.D.)
| | - Alireza F. Behbahani
- Institute of Applied and Computational Mathematics (IACM), Foundation for Research and Technology Hellas (FORTH), GR-70013 Heraklion, Greece;
| | - Craig Burkhart
- The Goodyear Tire and Rubber Company, Akron, OH 44305, USA;
| | | | - Manolis Doxastakis
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA; (W.L.); (M.D.)
| | - Vagelis Harmandaris
- Institute of Applied and Computational Mathematics (IACM), Foundation for Research and Technology Hellas (FORTH), GR-70013 Heraklion, Greece;
- Computation-Based Science and Technology Research Center, The Cyprus Institute, 20 Constantinou Kavafi Str., Nicosia 2121, Cyprus
- Department of Mathematics and Applied Mathematics, University of Crete, GR-70013 Heraklion, Greece
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