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Darko WK, Mangal D, Conrad JC, Palmer JC. Particle dispersion through porous media with heterogeneous attractions. SOFT MATTER 2024; 20:837-847. [PMID: 38170621 DOI: 10.1039/d3sm01166f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Porous media used in many practical applications contain natural spatial variations in composition and surface charge that lead to heterogeneous physicochemical attractions between the media and transported particles. We performed Stokesian dynamics (SD) simulations to examine the effects of heterogeneous attractions on quiescent diffusion and hydrodynamic dispersion of particles within geometrically ordered arrays of nanoposts. We find that transport under quiescent conditions occurs by two mechanisms, diffusion through the void space and intermittent hopping between the attractive wells of different nanoposts. As the attraction heterogeneity increases, the latter mechanism becomes dominant, resulting in an increase in the particle trajectory tortuosity, deviations from Gaussian behavior in the particle displacement distributions, and a decrease in the long-time particle diffusivity. Similarly, under flow conditions corresponding to low Péclet number (Pe), increased attraction heterogeneity leads to transient localization near the nanoposts, resulting in a broadening of the particle distribution and enhanced longitudinal dispersion in the direction of flow. At high Pe where advection strongly dominates, however, the longitudinal dispersion coefficient is insensitive to attraction heterogeneity and exhibits Taylor-Aris dispersion behavior. Our findings provide insight into how heterogeneous interactions may influence particle transport in complex 3-D porous media.
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Affiliation(s)
- Wilfred Kwabena Darko
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, 77204, USA.
| | - Deepak Mangal
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, 02115, USA
| | - Jacinta C Conrad
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, 77204, USA.
| | - Jeremy C Palmer
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, 77204, USA.
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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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Mangal D, Conrad JC, Palmer JC. Nanoparticle dispersion in porous media: Effects of attractive particle-media interactions. Phys Rev E 2022; 105:055102. [PMID: 35706234 DOI: 10.1103/physreve.105.055102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 04/01/2022] [Indexed: 06/15/2023]
Abstract
We investigate the effects of physicochemical attractions on the transport of finite-sized particles in three-dimensional ordered nanopost arrays using Stokesian dynamics simulations. We find that weak particle-nanopost attractions negligibly affect diffusion due to the dominance of Brownian fluctuations. Strong attractions, however, significantly hinder particle diffusion due to localization of particles around the nanoposts. Conversely, under flow, attractions significantly enhance longitudinal dispersion at low to moderate Péclet number (Pe). At high Pe, by contrast, advection becomes dominant and attractions weakly enhance dispersion. Moreover, attractions frustrate directional locking at moderate flow rates, and shift the onset of this behavior to higher Pe.
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Affiliation(s)
- Deepak Mangal
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, USA
| | - Jacinta C Conrad
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, USA
| | - Jeremy C Palmer
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, USA
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Dai LJ, Fu CL, Zhu YL, Li ZW, Sun ZY. Probing Intermittent Motion of Polymer Chains in Weakly Attractive Nanocomposites. CHINESE JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1007/s10118-020-2352-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Nunes SC, Cova TFGG, Dias RS, Pais AACC. Adsorption of charged macromolecules upon multicomponent responsive surfaces. Phys Chem Chem Phys 2018; 20:19811-19818. [DOI: 10.1039/c8cp03383h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A predictive model for polyelectrolyte adsorption upon responsive surfaces is presented, decoupling the effect of surface charges and crowders.
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Affiliation(s)
- Sandra C.C. Nunes
- Coimbra Chemistry Center
- CQC
- Faculty of Science and Technology
- University of Coimbra
- Portugal
| | - Tânia F. G. G. Cova
- Coimbra Chemistry Center
- CQC
- Faculty of Science and Technology
- University of Coimbra
- Portugal
| | - Rita S. Dias
- Department of Physics
- NTNU – Norwegian University of Science and Technology
- NO-7491 Trondheim
- Norway
| | - Alberto A. C. C. Pais
- Coimbra Chemistry Center
- CQC
- Faculty of Science and Technology
- University of Coimbra
- Portugal
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Chien W, Chen YL. Confinement, curvature, and attractive interaction effects on polymer surface adsorption. J Chem Phys 2017; 147:064901. [DOI: 10.1063/1.4996738] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Wei Chien
- Institute of Physics, Academia Sinica, Taipei, Taiwan
- Department of Physics, National Taiwan University, Taipei, Taiwan
| | - Yeng-Long Chen
- Institute of Physics, Academia Sinica, Taipei, Taiwan
- Department of Physics, National Taiwan University, Taipei, Taiwan
- Department of Chemical Engineering, National Tsing-Hua University, Hsinchu, Taiwan
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Joo H, Kim JS. Confinement-driven organization of a histone-complexed DNA molecule in a dense array of nanoposts. NANOSCALE 2017; 9:6391-6398. [PMID: 28453018 DOI: 10.1039/c7nr00859g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The first step in the controlled storage of lengthy DNA molecules is to keep DNA molecules separated while integrated in micrometer-sized space. Herein, we present hybrid Monte Carlo simulations of a histone-complexed DNA (hcDNA) molecule confined in a dense array of nanoposts. Depending on the nanopost dimension, a single, 8.7 kilobase pair hcDNA molecule was either localized and elongated in a single inter-post space surrounded by four nanoposts or spread over several inter-post spaces through passages between two neighboring nanoposts. The conformational change of a hcDNA molecule is interpreted in terms of competitive effects of confinements in the inter-post and passage spaces. We propose that, by elaborately designing nanopost arrays, the competitive confinement effects can be adjusted such that each hcDNA molecule is localized in a single inter-post space, and thereby multiple hcDNA molecules can be physically separated from each other while stored together in the nanopost array.
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Affiliation(s)
- Heesun Joo
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea.
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Chien FT, Lin PK, Chien W, Hung CH, Yu MH, Chou CF, Chen YL. Crowding-facilitated macromolecular transport in attractive micropost arrays. Sci Rep 2017; 7:1340. [PMID: 28465594 PMCID: PMC5430964 DOI: 10.1038/s41598-017-01248-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 03/27/2017] [Indexed: 11/18/2022] Open
Abstract
Our study of DNA dynamics in weakly attractive nanofabricated post arrays revealed crowding enhances polymer transport, contrary to hindered transport in repulsive medium. The coupling of DNA diffusion and adsorption to the microposts results in more frequent cross-post hopping and increased long-term diffusivity with increased crowding density. We performed Langevin dynamics simulations and found maximum long-term diffusivity in post arrays with gap sizes comparable to the polymer radius of gyration. We found that macromolecular transport in weakly attractive post arrays is faster than in non-attractive dense medium. Furthermore, we employed hidden Markov analysis to determine the transition of macromolecular adsorption-desorption on posts and hopping between posts. The apparent free energy barriers are comparable to theoretical estimates determined from polymer conformational fluctuations.
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Affiliation(s)
- Fan-Tso Chien
- Institute of Physics, Academia Sinica, Taipei, Taiwan, ROC.,Department of Life Science, National Dong Hwa University, Hualien, Taiwan, ROC
| | - Po-Keng Lin
- Institute of Physics, Academia Sinica, Taipei, Taiwan, ROC
| | - Wei Chien
- Institute of Physics, Academia Sinica, Taipei, Taiwan, ROC.,Department of Physics, National Taiwan University, Taipei, Taiwan, ROC
| | - Cheng-Hsiang Hung
- Department of Physics, National Taiwan University, Taipei, Taiwan, ROC
| | - Ming-Hung Yu
- Institute of Physics, Academia Sinica, Taipei, Taiwan, ROC
| | - Chia-Fu Chou
- Institute of Physics, Academia Sinica, Taipei, Taiwan, ROC
| | - Yeng-Long Chen
- Institute of Physics, Academia Sinica, Taipei, Taiwan, ROC. .,Department of Physics, National Taiwan University, Taipei, Taiwan, ROC. .,Department of Chemical Engineering, National Tsing-Hua University, Hsinchu, Taiwan, ROC.
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