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Wessels MG, Jayaraman A. Self-assembly of amphiphilic polymers of varying architectures near attractive surfaces. SOFT MATTER 2020; 16:623-633. [PMID: 31808757 DOI: 10.1039/c9sm02104c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We use coarse-grained molecular dynamics simulations to investigate the assembly of A-B amphiphilic polymers near/on surfaces as a function of polymer architecture and surface attraction to the solvophobic B-block in the polymer. We study four polymer architectures: linear, bottlebrush with a backbone that is longer than each of the side chains, bottlebrush where the solvophobic backbone is similar in length to each of the side chains, and 'star-like' architectures where the backbone is significantly shorter than the side chain lengths. For each architecture and surface-B attraction, we quantify the assembled aggregate structure (i.e., aggregation number, domain shapes and sizes) and the chain conformations (i.e., components of the chain radius of gyration) on and away from the surface. For all the architectures and surface-B attraction strengths, the assembled structure away from the surface is similar to the assembly observed in bulk systems without surfaces. Near/on the surface, the assembled B-blocks form domains whose shapes and sizes are dependent on the surface-B attraction strength and the ability of the B-block in the polymer architecture to change conformations and pack on the surface. Domain sizes formed from linear and 'star-like' polymer architectures show the highest sensitivity to surface-B-block attraction strength, transitioning from hemispherical to disordered domains with increasing attraction strength. In contrast, bottlebrushes with long backbones and short side chains transition from hemispherical to striped to continuous domains with increasing surface-B attraction strength. Bottlebrushes with similar solvophobic backbone and side chain lengths form hemispherical domains that do not change significantly with the surface-B-block attraction strength. These computational results can guide experimentalists in their choices of surface chemistry and polymer architecture to achieve desired assembled domain shapes and sizes on the surface.
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Affiliation(s)
- Michiel G Wessels
- Colburn Laboratory, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA.
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Dong M, Wessels MG, Lee JY, Su L, Wang H, Letteri RA, Song Y, Lin YN, Chen Y, Li R, Pochan DJ, Jayaraman A, Wooley KL. Experiments and Simulations of Complex Sugar-Based Coil-Brush Block Polymer Nanoassemblies in Aqueous Solution. ACS NANO 2019; 13:5147-5162. [PMID: 30990651 DOI: 10.1021/acsnano.8b08811] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this work, we investigated the fundamental molecular parameters that guide the supramolecular assembly of glucose-based amphiphilic coil-brush block polymers in aqueous solution and elucidated architecture-morphology relationships through experimental and simulation tools. Well-defined coil-brush polymers were synthesized through ring-opening polymerizations (ROP) of glucose carbonates to afford norbornenyl-functionalized poly(glucose carbonate) (NB-PGC) macromonomers, followed by sequential ring-opening metathesis polymerizations (ROMP) of norbornene N-hydroxysuccinimidyl (NHS) esters and the NB-PGC macromonomers. Variation of the macromonomer length and grafting through ROMP conditions allowed for a series of coil-brush polymers to be synthesized with differences in the brush and coil dimensions, independently, where the side chain graft length and brush backbone were used to tune the brush, and the coil block length was used to vary the coil. Hydrolysis of the NHS moieties gave the amphiphilic coil-brush polymers, where the hydrophilic-hydrophobic ratios were dependent on the brush and coil relative dimensions. Experimental assembly in solution was studied and found to yield a variety of structurally dependent nanostructures. Simulations were conducted on the solution assembly of coil-brush polymers, where the polymers were represented by a coarse-grained model and the solvent was represented implicitly. There is qualitative agreement in the phase diagrams obtained from simulations and experiments, in terms of the morphologies of the assembled nanoscopic structures achieved as a function of coil-brush design parameters ( e.g., brush and coil lengths, composition). The simulations further showed the chain conformations adopted by the coil-brush polymers and the packing within these assembled nanoscopic structures. This work enables the predictive design of nanostructures from this glucose-based coil-brush polymer platform while providing a fundamental understanding of interactions within solution assembly of complex polymer building blocks.
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Affiliation(s)
- Mei Dong
- Departments of Chemistry, Chemical Engineering, Materials Science & Engineering, and the Laboratory for Synthetic-Biologic Interactions , Texas A&M University , College Station , Texas 77843 , United States
| | - Michiel G Wessels
- Department of Chemical & Biomolecular Engineering, Colburn Laboratory , University of Delaware , Newark , Delaware 19716 , United States
| | - Jee Young Lee
- Department of Materials Science and Engineering , University of Delaware , Newark , Delaware 19716 , United States
| | - Lu Su
- Departments of Chemistry, Chemical Engineering, Materials Science & Engineering, and the Laboratory for Synthetic-Biologic Interactions , Texas A&M University , College Station , Texas 77843 , United States
| | - Hai Wang
- Departments of Chemistry, Chemical Engineering, Materials Science & Engineering, and the Laboratory for Synthetic-Biologic Interactions , Texas A&M University , College Station , Texas 77843 , United States
| | - Rachel A Letteri
- Departments of Chemistry, Chemical Engineering, Materials Science & Engineering, and the Laboratory for Synthetic-Biologic Interactions , Texas A&M University , College Station , Texas 77843 , United States
| | - Yue Song
- Departments of Chemistry, Chemical Engineering, Materials Science & Engineering, and the Laboratory for Synthetic-Biologic Interactions , Texas A&M University , College Station , Texas 77843 , United States
| | - Yen-Nan Lin
- Departments of Chemistry, Chemical Engineering, Materials Science & Engineering, and the Laboratory for Synthetic-Biologic Interactions , Texas A&M University , College Station , Texas 77843 , United States
- College of Medicine , Texas A&M University , Bryan , Texas 77807 , United States
| | - Yingchao Chen
- Departments of Chemistry, Chemical Engineering, Materials Science & Engineering, and the Laboratory for Synthetic-Biologic Interactions , Texas A&M University , College Station , Texas 77843 , United States
| | - Richen Li
- Departments of Chemistry, Chemical Engineering, Materials Science & Engineering, and the Laboratory for Synthetic-Biologic Interactions , Texas A&M University , College Station , Texas 77843 , United States
| | - Darrin J Pochan
- Department of Materials Science and Engineering , University of Delaware , Newark , Delaware 19716 , United States
| | - Arthi Jayaraman
- Department of Chemical & Biomolecular Engineering, Colburn Laboratory , University of Delaware , Newark , Delaware 19716 , United States
- Department of Materials Science and Engineering , University of Delaware , Newark , Delaware 19716 , United States
| | - Karen L Wooley
- Departments of Chemistry, Chemical Engineering, Materials Science & Engineering, and the Laboratory for Synthetic-Biologic Interactions , Texas A&M University , College Station , Texas 77843 , United States
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Wessels MG, Jayaraman A. Molecular dynamics simulation study of linear, bottlebrush, and star-like amphiphilic block polymer assembly in solution. SOFT MATTER 2019; 15:3987-3998. [PMID: 31025695 DOI: 10.1039/c9sm00375d] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this study we investigate the effect of varying branched polymer architectures on the assembly of amphiphilic block polymers in solution using coarse-grained molecular dynamics simulations. We quantify assembly structure (e.g., aggregation number, assembly morphology, and micelle core size) and thermodynamics (e.g., unimer to micelle transition conditions) as a function of increasing solvophobicity of the solvophobic block in the copolymer for three broad categories of polymer architectures: linear, 'bottlebrush' (with many short side chains on a long backbone), and 'star-like' (with few long side chains on a short backbone). Keeping the total number of coarse-grained beads in each polymer (or polymer molecular weight) constant, as we go from either linear or 'star-like' to 'bottlebrush' polymer architectures, the micelle aggregation number and micelle core size decrease, and the solvophobicity required for assembly (i.e., transition solvophobicity) increases. This trend is linked to the topological/steric hinderance for making solvophobic bead contacts between neighboring polymers for the 'bottlebrush' polymer architecture compared to the linear or 'star-like' architectures. We are able to identify some universal trends in assembly by plotting the assembly structure and thermodynamics data as a function of branching parameter defined as the ratio of the branched chain to the linear chain radius of gyration in the unimer state, and the relative lengths of the backbone versus side chain. The results in this paper guide how one could manipulate the amphiphilic block polymer assembly structure and thermodynamics by choosing appropriate polymer architecture, block sequence, and composition.
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Affiliation(s)
- Michiel G Wessels
- Colburn Laboratory, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA.
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Lyubimov I, Wessels MG, Jayaraman A. Molecular Dynamics Simulation and PRISM Theory Study of Assembly in Solutions of Amphiphilic Bottlebrush Block Copolymers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01535] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ivan Lyubimov
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
| | - Michiel G. Wessels
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
| | - Arthi Jayaraman
- Department of Chemical and Biomolecular Engineering, 150 Academy Street, Colburn Laboratory, Newark, Delaware 19716, United States
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, United States
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Zhang Q, Lin J, Wang L, Xu Z. Theoretical modeling and simulations of self-assembly of copolymers in solution. Prog Polym Sci 2017. [DOI: 10.1016/j.progpolymsci.2017.04.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Affiliation(s)
- M. J. Greenall
- Institute of Mathematics,
Physics and Computer Science, Physical Sciences Building, Aberystwyth University, Aberystwyth SY23 3BZ, United Kingdom
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Moreno N, Nunes SP, Peinemann KV, Calo VM. Topology and Shape Control for Assemblies of Block Copolymer Blends in Solution. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01891] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Nicolas Moreno
- Biological and Environmental Science and Engineering Division, ‡Center for Numerical Porous Media, §Advanced Membranes and Porous Material Center, and ∥Earth Science & Engineering and Applied Mathematics & Computational Science, King Abdullah University of Science and Technology, Thuwal, Makkah, Saudi Arabia 23955-6900
| | - Suzana P. Nunes
- Biological and Environmental Science and Engineering Division, ‡Center for Numerical Porous Media, §Advanced Membranes and Porous Material Center, and ∥Earth Science & Engineering and Applied Mathematics & Computational Science, King Abdullah University of Science and Technology, Thuwal, Makkah, Saudi Arabia 23955-6900
| | - Klaus-Viktor Peinemann
- Biological and Environmental Science and Engineering Division, ‡Center for Numerical Porous Media, §Advanced Membranes and Porous Material Center, and ∥Earth Science & Engineering and Applied Mathematics & Computational Science, King Abdullah University of Science and Technology, Thuwal, Makkah, Saudi Arabia 23955-6900
| | - Victor M. Calo
- Biological and Environmental Science and Engineering Division, ‡Center for Numerical Porous Media, §Advanced Membranes and Porous Material Center, and ∥Earth Science & Engineering and Applied Mathematics & Computational Science, King Abdullah University of Science and Technology, Thuwal, Makkah, Saudi Arabia 23955-6900
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Hierarchical nanostructures self-assembled from a mixture system containing rod-coil block copolymers and rigid homopolymers. Sci Rep 2015; 5:10137. [PMID: 25965726 PMCID: PMC4428031 DOI: 10.1038/srep10137] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 03/30/2015] [Indexed: 01/28/2023] Open
Abstract
Self-assembly behavior of a mixture system containing rod-coil block copolymers and rigid homopolymers was investigated by using Brownian dynamics simulations. The morphologies of formed hierarchical self-assemblies were found to be dependent on the Lennard-Jones (LJ) interaction εRR between rod blocks, lengths of rod and coil blocks in copolymer, and mixture ratio of block copolymers to homopolymers. As the εRR value decreases, the self-assembled structures of mixtures are transformed from an abacus-like structure to a helical structure, to a plain fiber, and finally are broken into unimers. The order parameter of rod blocks was calculated to confirm the structure transition. Through varying the length of rod and coil blocks, the regions of thermodynamic stability of abacus, helix, plain fiber, and unimers were mapped. Moreover, it was discovered that two levels of rod block ordering exist in the helices. The block copolymers are helically wrapped on the homopolymer bundles to form helical string, while the rod blocks are twistingly packed inside the string. In addition, the simulation results are in good agreement with experimental observations. The present work reveals the mechanism behind the formation of helical (experimentally super-helical) structures and may provide useful information for design and preparation of the complex structures.
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Xu Y, Wang C, Zhong S, Li W, Lin Z. Self-assembly of miktoarm star-like ABn block copolymers: from wet to dry brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:2905-2913. [PMID: 25689323 DOI: 10.1021/acs.langmuir.5b00081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Self-assembly of miktoarm star-like ABn block copolymer in both selective solvent (A- or B-selective) and miscible homopolymer matrix (A or B homopolymer), that is, formation of micelles, was for the first time investigated by theoretical calculations based on self-consistent mean field theory. Interestingly, the calculation revealed that the size of micelles in solvent was smaller than that in homopolymer under the same conditions. In B-selective solvent, with increasing number of B blocks n in miktoarm star-like ABn block copolymer at a fixed volume fraction of A block, the micellar size decreased gradually. In stark contrast, when miktoarm star-like ABn block copolymer dissolved in B homopolymer matrix at molecular weight ratio of B homopolymer to ABn block copolymer fH = 0.30, the overall micellar size decreased nonmonotonically as the number of B blocks n in ABn block copolymer increased. The largest micelle was formed in AB2 (i.e., n = 2). This intriguing finding can be attributed to a wet-to-dry brush transition that occurred from n = 1 to n = 2 in the micellization of miktoarm star-like ABn block copolymer. Moreover, the micellization behaviors of miktoarm star-like ABn block copolymer in A-selective solvent and A homopolymer matrix were also explored, where the overall micellar size in both scenarios was found to decrease monotonically as n in ABn block copolymer increased. These self-assembled nanostructures composed of miktoarm star-like ABn block copolymers may promise a wide range of applications in size-dependent drug delivery and bionanotechnology.
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Affiliation(s)
- Yuci Xu
- Department of Polymer Science and Engineering, Faculty of Materials Science and Chemical Engineering, Key Laboratory of Specialty Polymers, Ningbo University , Ningbo, Zhejiang 315211, China
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Greenall MJ, Marques CM. Can adding oil control domain formation in binary amphiphile bilayers? SOFT MATTER 2014; 10:7925-7931. [PMID: 25099471 DOI: 10.1039/c4sm01265h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bilayers formed of two species of amphiphile of different chain lengths may segregate into thinner and thicker domains composed predominantly of the respective species. Using a coarse-grained mean-field model, we investigate how mixing oil with the amphiphiles affects the structure and thickness of the bilayer at and on either side of the boundary between two neighbouring domains. In particular, we find that oil molecules whose chain length is close to that of the shorter amphiphiles segregate to the thicker domain. This smooths the surface of the hydrophobic bilayer core on this side of the boundary, reducing its area and curvature and their associated free-energy penalties. The smoothing effect is weaker for oil molecules that are shorter or longer than this optimum value: short molecules spread evenly through the bilayer, while long molecules swell the thicker domain, increasing the surface area and curvature of the bilayer core in the interfacial region. Our results show that adding an appropriate oil could make the formation of domain boundaries more or less favourable, raising the possibility of controlling the domain size distribution.
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Affiliation(s)
- Martin J Greenall
- Institut Charles Sadron, 23, rue du Loess, 67034 Strasbourg, France.
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Ting CL, Frischknecht AL, Stevens MJ, Spoerke ED. Electrostatically Tuned Self-Assembly of Branched Amphiphilic Peptides. J Phys Chem B 2014; 118:8624-30. [DOI: 10.1021/jp503414p] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Christina L. Ting
- Computational Materials and Data Science, ‡Center for Integrated Nanotechnologies, and ¶Electronic, Optical,
and NanoMaterials, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Amalie L. Frischknecht
- Computational Materials and Data Science, ‡Center for Integrated Nanotechnologies, and ¶Electronic, Optical,
and NanoMaterials, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Mark J. Stevens
- Computational Materials and Data Science, ‡Center for Integrated Nanotechnologies, and ¶Electronic, Optical,
and NanoMaterials, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Erik D. Spoerke
- Computational Materials and Data Science, ‡Center for Integrated Nanotechnologies, and ¶Electronic, Optical,
and NanoMaterials, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
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Wang R, Wang ZG. Theory of Polymer Chains in Poor Solvent: Single-Chain Structure, Solution Thermodynamics, and Θ Point. Macromolecules 2014. [DOI: 10.1021/ma5003968] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rui Wang
- Division
of Chemistry and
Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Zhen-Gang Wang
- Division
of Chemistry and
Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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13
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Wang R, Jiang Z, Yang H, Xue G. Side chain effect on the self-assembly of coil-comb copolymer by self-consistent field theory in two dimensions. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.10.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Liu Z, Jiang ZB, Yang H, Bai SM, Wang R, Xue G. Crowding effect induced phase transition of amphiphilic diblock copolymer in solution. CHINESE JOURNAL OF POLYMER SCIENCE 2013. [DOI: 10.1007/s10118-013-1346-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wang L, Jiang T, Lin J. Self-assembly of graft copolymers in backbone-selective solvents: a route toward stable hierarchical vesicles. RSC Adv 2013. [DOI: 10.1039/c3ra43355b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Jin J, Wang J, Sun P, Zhao H. Hydrophilic interface-crosslinked polymer micelles: a platform for nanoreactors and nanocarriers. Polym Chem 2013. [DOI: 10.1039/c3py00516j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Shi H, Zhao Y, Dong X, Zhou Y, Wang D. Frustrated crystallisation and hierarchical self-assembly behaviour of comb-like polymers. Chem Soc Rev 2013; 42:2075-99. [DOI: 10.1039/c2cs35350d] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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18
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Wang R, Wang ZG. Theory of Polymers in Poor Solvent: Phase Equilibrium and Nucleation Behavior. Macromolecules 2012. [DOI: 10.1021/ma301049m] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rui Wang
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California
91125, United States
| | - Zhen-Gang Wang
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California
91125, United States
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Greenall MJ, Gompper G. Simple and Complex Micelles in Amphiphilic Mixtures: A Coarse-Grained Mean-Field Study. Macromolecules 2011. [DOI: 10.1021/ma2014639] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Martin J. Greenall
- Theoretical
Soft Matter and Biophysics, Institute for Complex Systems, Forschungszentrum Jülich, 52425 Jülich,
Germany
- Institut Charles Sadron, 23, rue du Loess, 67034 Strasbourg,
France
| | - Gerhard Gompper
- Theoretical
Soft Matter and Biophysics, Institute for Complex Systems, Forschungszentrum Jülich, 52425 Jülich,
Germany
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ZHUANG Y, WANG L, LIN J. SELF-ASSEMBLY BEHAVIOR OF SUPRAMOLECULAR DIBLOCK COPOLYMER/HOMOPOLYMER MIXTURES WITH NON-COVALENT BONDING INTERACTIONS IN SELECTIVE SOLVENTS. ACTA POLYM SIN 2011. [DOI: 10.3724/sp.j.1105.2011.11017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Jiang T, Wang L, Lin S, Lin J, Li Y. Structural evolution of multicompartment micelles self-assembled from linear ABC triblock copolymer in selective solvents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:6440-6448. [PMID: 21506539 DOI: 10.1021/la201080z] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Using dissipative particle dynamics simulation, structural evolution from concentric multicompartment micelles to raspberry-like multicompartment micelles self-assembled from linear ABC triblock copolymers in selective solvents was investigated. The structural transformation from concentric micelles to raspberry-like micelles can be controlled by changing either the length of B blocks or the solubility of B block. It was found that the structures with B bumps on C surface (B-bump-C) are formed at shorter B block length and the structures with C bumps on B surface (C-bump-B) are formed at relative lower solubility of B blocks. The formation of B-bump-C is entropy-driven, while the formation of C-bump-B is enthalpy-dominated. Furthermore, when the length of C blocks is much lower than that of B blocks, an inner-penetrating vesicle was discovered. The results gained through the simulations provide an insight into the mechanism behind the formation of raspberry-like micelles.
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Affiliation(s)
- Tao Jiang
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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Wang R, Jiang Z, Xue G. Excluded volume effect on the self-assembly of amphiphilic AB diblock copolymer in dilute solution. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.03.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Cai C, Wang L, Lin J. Self-assembly of polypeptide-based copolymers into diverse aggregates. Chem Commun (Camb) 2011; 47:11189-203. [DOI: 10.1039/c1cc12683k] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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