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Popova TO, Borisov OV, Zhulina EB. Polyelectrolyte Brushes with Protein-Like Nanocolloids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1232-1246. [PMID: 38176061 DOI: 10.1021/acs.langmuir.3c02556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Electrostatic interaction of ampholytic nanocolloidal particles (NPs), which mimic globular proteins, with polyelectrolyte brushes is analyzed within mean-field Poisson-Boltzmann approximation. In accordance with experimental findings, the theory predicts that an electrostatic driving force for the particle uptake by the brush may emerge when the net charge of the particle in the buffer and the charge of the brush are of the same sign. The origin of this driving force is change in the ionization state of weak cationic and anionic groups on the NP surface provoked by interaction with the brush. In experimental systems, the ionic interactions are complemented by excluded-volume, hydrophobic, and other types of interactions that all together control NP uptake by or expulsion from the brush. Here, we focus on the NP-brush ionic interactions. It is demonstrated that deviation between the buffer pH and the NP isoelectric point, considered usually as the key control parameter, does not uniquely determine the insertion free energy patterns. The latter depends also on the proportion of cationic and anionic groups in the NPs and their specific ionization constants as well as on salt concentration in the buffer. The analysis of the free energy landscape proves that a local minimum in the free energy inside the brush appears, provided the NP charge reversal occurs upon insertion into the brush. This minimum corresponds either to a thermodynamically stable or to a metastable state, depending on the pH offset from the IEP and salt concentration, and is separated from the bulk of the solution by a free energy barrier. The latter, being fairly independent of salt concentration in height, may strongly impede the NP absorption kinetically even when it is thermodynamically favorable. Hence, change reversal is a necessary but insufficient condition for the uptake of the NPs by similarly charged polyelectrolyte brushes.
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Affiliation(s)
- Tatiana O Popova
- ITMO University, 197101 St. Petersburg, Russia
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Oleg V Borisov
- ITMO University, 197101 St. Petersburg, Russia
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 199004 St. Petersburg, Russia
- Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, CNRS, Université de Pau et des Pays de l'Adour UMR 5254, Pau 64053, France
| | - Ekaterina B Zhulina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, 199004 St. Petersburg, Russia
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Li C, Liu R, Xue Q, Huang Y, Su Y, Shen Q, Wang D. Oil-in-Water Emulsion Templated and Crystallization-Driven Self-Assembly Formation of Poly(l-lactide)-Polyoxyethylene-Poly(l-lactide) Fibers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:13060-13067. [PMID: 29064708 DOI: 10.1021/acs.langmuir.7b02596] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A molecular solution of an amphiphilic block copolymer may act as an oil phase by dispersing into an aqueous micellar system of small-molecular surfactant, forming oil-in-water (O/W) emulsion droplets. In this paper, an as-synthesized triblock copolymer poly(l-lactide)-polyoxyethylene-poly(l-lactide) (PLLA-PEO-PLLA) was dissolved in tetrahydrofuran (THF) and then added to an aqueous micellar solution of nonaethylene glycol monododecyl ether (AEO-9), forming initially coalescent O/W emulsion droplets in the size range of 35 nm-1.3 μm. Along with gradual volatilization of THF and simultaneous concentration of PLLA-PEO-PLLA molecules, the amphiphilic copolymer backbones themselves experience solution-based self-assembly, forming inverted core-corona aggregates within an oil-phase domain. Anisotropic coalescence of adjacent O/W emulsion droplets occurs, accompanied by further volatilization of THF. The hydrophilic block crystallization of core-forming PEOs and the hydrophobic chain stretch of corona-forming PLLAs together induce the intermediate formation of rod-like architectures with an average diameter of 300-800 nm, and this leads to a large-scale deposition of the triblock copolymer fibers with an average diameter of ∼2.0 μm. Consequently, this strategy could be of general interest in the self-assembly formation of amphiphilic block copolymer fibers and could also provide access to aqueous solution crystallization of hydrophilic segments of these copolymers.
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Affiliation(s)
- Chunyu Li
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University , Shan Da Nan Road 27, Jinan 250100, China
| | - Rui Liu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University , Shan Da Nan Road 27, Jinan 250100, China
| | - Qingbin Xue
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University , Shan Da Nan Road 27, Jinan 250100, China
| | - Yaping Huang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences , Zhongguancun North First Street 2, Beijing 100190, China
| | - Yunlan Su
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences , Zhongguancun North First Street 2, Beijing 100190, China
| | - Qiang Shen
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University , Shan Da Nan Road 27, Jinan 250100, China
| | - Dujin Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences , Zhongguancun North First Street 2, Beijing 100190, China
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Lebedeva IO, Zhulina EB, Borisov OV. Self-consistent field theory of polyelectrolyte brushes with finite chain extensibility. J Chem Phys 2017; 146:214901. [PMID: 28595404 PMCID: PMC5459626 DOI: 10.1063/1.4984101] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 05/12/2017] [Indexed: 11/14/2022] Open
Abstract
Polyelectrolyte brushes are formed by charged macromolecules tethered by the end segment to a solid-liquid interface. At low ionic strength of the solution, the intermolecular electrostatic interactions lead to strong stretching of the macromolecules that may, as a result, approach the limit of their extensibility (the contour length). Here, we present an analytical theory of polyelectrolyte brushes developed within the Poisson-Boltzmann approximation which explicitly accounts for finite extensibility of the brush-forming chains. In contrast to earlier theories based on the approximation of Gaussian elasticity of the brush-forming chains, the current approach enables avoiding artificial result of stretching of the chains beyond the contour length at high degrees of ionization or/and large grafting densities.
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Affiliation(s)
- Inna O Lebedeva
- Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR 5254 CNRS UPPA, Pau, France
| | - Ekaterina B Zhulina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, St. Petersburg, Russia
| | - Oleg V Borisov
- Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR 5254 CNRS UPPA, Pau, France
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Leermakers F, Zhulina E, Borisov O. Interaction forces and lubrication of dendronized surfaces. Curr Opin Colloid Interface Sci 2017. [DOI: 10.1016/j.cocis.2016.09.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Affiliation(s)
- Aykut Erbaş
- Department
of Materials Science and Engineering and ‡Department of Chemistry, Department
of Chemical and Biological Engineering, and Department of Physics, Northwestern University, Evanston, Illinois 60208, United States
| | - Monica Olvera de la Cruz
- Department
of Materials Science and Engineering and ‡Department of Chemistry, Department
of Chemical and Biological Engineering, and Department of Physics, Northwestern University, Evanston, Illinois 60208, United States
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Choueiri RM, Galati E, Klinkova A, Thérien-Aubin H, Kumacheva E. Linear assembly of patchy and non-patchy nanoparticles. Faraday Discuss 2016; 191:189-204. [DOI: 10.1039/c6fd00057f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Linear assemblies of nanoparticles show promising applications due to their collective electronic, optical and magnetic properties. Rational design and controllable organization of nanoparticles in one-dimensional structures can strongly benefit from the marked similarity between conventional step-growth polymerization reactions and directional step-wise assembly of nanoparticles in linear chains. Here we show different aspects of the “polymerization” approach to the solution-based self-assembly of polymer-functionalized metal nanoparticles with different chemical compositions, shapes and dimensions. The self-assembly was triggered by inducing solvophobic attraction between polymer ligands, due to the change in solvent quality. We show that both anisotropic (patchy) nanoparticles and nanoparticles uniformly capped with polymer molecules can self-assemble in linear chains. We explore the control of chain length, morphology, and composition, discuss the ability to form isotropic and hierarchical structures and show the properties and potential applications of linear assemblies of plasmonic nanoparticles.
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Affiliation(s)
| | | | - Anna Klinkova
- Department of Chemistry
- University of Toronto
- Toronto
- Canada
| | | | - Eugenia Kumacheva
- Department of Chemistry
- University of Toronto
- Toronto
- Canada
- Department of Chemical Engineering and Applied Chemistry
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Pregent S, Lichtenstein A, Avinery R, Laser-Azogui A, Patolsky F, Beck R. Probing the interactions of intrinsically disordered proteins using nanoparticle tags. NANO LETTERS 2015; 15:3080-3087. [PMID: 25822629 DOI: 10.1021/acs.nanolett.5b00073] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The structural plasticity of intrinsically disordered proteins serves as a rich area for scientific inquiry. Such proteins lack a fix three-dimensional structure but can interact with multiple partners through numerous weak bonds. Nevertheless, this intrinsic plasticity possesses a challenging hurdle in their characterization. We underpin the intermolecular interactions between intrinsically disordered neurofilaments in various hydrated conditions, using grafted gold nanoparticle (NP) tags. Beyond its biological significance, this approach can be applied to modify the surface interaction of NPs for the creation of future tunable "smart" hybrid biomaterials.
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Affiliation(s)
- Stive Pregent
- †School of Physics and Astronomy, ‡Center for Nanoscience and Nanotechnology and §School of Chemistry, Tel Aviv University, Tel Aviv, Israel
| | - Amir Lichtenstein
- †School of Physics and Astronomy, ‡Center for Nanoscience and Nanotechnology and §School of Chemistry, Tel Aviv University, Tel Aviv, Israel
| | - Ram Avinery
- †School of Physics and Astronomy, ‡Center for Nanoscience and Nanotechnology and §School of Chemistry, Tel Aviv University, Tel Aviv, Israel
| | - Adi Laser-Azogui
- †School of Physics and Astronomy, ‡Center for Nanoscience and Nanotechnology and §School of Chemistry, Tel Aviv University, Tel Aviv, Israel
| | - Fernando Patolsky
- †School of Physics and Astronomy, ‡Center for Nanoscience and Nanotechnology and §School of Chemistry, Tel Aviv University, Tel Aviv, Israel
| | - Roy Beck
- †School of Physics and Astronomy, ‡Center for Nanoscience and Nanotechnology and §School of Chemistry, Tel Aviv University, Tel Aviv, Israel
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Wen Y, Guo X, Kalasin S, Santore MM. Capture of soft particles on electrostatically heterogeneous collectors: brushy particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:2019-2027. [PMID: 24559048 DOI: 10.1021/la404235g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This work investigated how particle softness can influence the initial adhesive capture of submicrometer colloidal particles from flow onto collecting surfaces. The study focused on the case dominated by potential attractions at the particle periphery (rather than, for instance, steric stabilization, requiring entropically costly deformations to access shorter-range van der Waals attractions.) The particles, "spherical polyelectrolyte brushes" with diameters in the range of 150-200 nm depending on the ionic strength, consisted of a polystyrene core and a corona of grafted poly(acrylic acid) chains, producing a relatively thick (20-40 nm) negative brushy layer. The adhesion of these particles was studied on electrostatically heterogeneous collecting surfaces: negatively charged substrates carrying flat polycationic patches made by irreversibly adsorbing the poly-l-lysine (PLL) polyelectrolyte. Variation in the amount of adsorbed PLL changed the net collector charge from completely negatively charged (repulsive) to positively charged (attractive). Adjustments in ionic strength varied the range of the electrostatic interactions. Comparing capture kinetics of soft brushy particles to those of similarly sized and similarly charged silica particles revealed nearly identical particle capture kinetics over the full range of collecting surface compositions at high ionic strengths. Even though the brushy particles contained an average of 5 vol % PAA in the brushy shell, with the rest being water under these conditions, their capture was indistinguishable from that of similarly charged rigid spheres. The brushy particles were, however, considerably less adherent at low ionic strengths where the brush was more extended, suggesting an influence of particle deformability or reduced interfacial charge. These findings, that the short time adhesion of brushy particles can resemble that of rigid particles, suggest that for bacteria and cell capture, modeling the cells as rigid particles can, in some instances, be a good approximation.
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Affiliation(s)
- Yicun Wen
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
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Choueiri RM, Klinkova A, Thérien-Aubin H, Rubinstein M, Kumacheva E. Structural transitions in nanoparticle assemblies governed by competing nanoscale forces. J Am Chem Soc 2013; 135:10262-5. [PMID: 23806016 DOI: 10.1021/ja404341r] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Assembly of nanoscale materials from nanoparticle (NP) building blocks relies on our understanding of multiple nanoscale forces acting between NPs. These forces may compete with each other and yield distinct stimuli-responsive self-assembled nanostructures. Here, we report structural transitions between linear chains and globular assemblies of charged, polymer-stabilized gold NPs, which are governed by the competition of repulsive electrostatic forces and attractive poor solvency/hydrophobic forces. We propose a simple quantitative model and show that these transitions can be controlled by the quality of solvent, addition of a salt, and variation of the molecular weight of the polymer ligands.
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Affiliation(s)
- Rachelle M Choueiri
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
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Jusufi A, Borisov O, Ballauff M. Structure formation in polyelectrolytes induced by multivalent ions. POLYMER 2013. [DOI: 10.1016/j.polymer.2012.12.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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