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Aliakseyeu A, Shah PP, Ankner JF, Sukhishvili SA. Salt-Induced Diffusion of Star and Linear Polyelectrolytes within Multilayer Films. Macromolecules 2023; 56:5434-5445. [PMID: 38357536 PMCID: PMC10863069 DOI: 10.1021/acs.macromol.3c00777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 06/19/2023] [Indexed: 02/16/2024]
Abstract
This study explores the effect of salt on the diffusivity of polyelectrolytes of varied molecular architecture in layer-by-layer (LbL) films in directions parallel and perpendicular to the substrate using fluorescence recovery after photobleaching (FRAP) and neutron reflectivity (NR) techniques, respectively. A family of linear, 4-arm, 6-arm, and 8-arm poly(methacrylic acids) (LPMAA, 4PMAA, 6PMAA, and 8PMAA, respectively) of matched molecular weights were synthesized using atom transfer radical polymerization and assembled with a linear polycation, poly[2-(trimethylammonium)ethyl methacrylate chloride] (QPC). NR studies involving deuterated QPC revealed ∼10-fold higher polycation mobility for the 8PMAA/QPC system compared to all-linear LbL films upon exposure to 0.25 M NaCl solutions at pH 6. FRAP experiments showed, however, that lateral diffusion of star PMAAs was lower than LPMAA at NaCl concentrations below ∼0.22 M NaCl, with a crossover to higher mobility of star polymers in more concentrated salt solutions. The stronger response of diffusion of star PMAA to salt is discussed in the context of several theories previously suggested for diffusivity of polyelectrolyte chains in multilayer films and coacervates.
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Affiliation(s)
- Aliaksei Aliakseyeu
- Department
of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Parin Purvin Shah
- Department
of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - John F. Ankner
- Spallation
Neutron Source Second Target Station Project, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Svetlana A. Sukhishvili
- Department
of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, United States
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2
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Ahmad M, Ahmed M. Characterization and applications of ion-exchange membranes and selective ion transport through them: a review. J APPL ELECTROCHEM 2023. [DOI: 10.1007/s10800-023-01882-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
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3
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Molecular Organization in Exponentially Growing Multilayer Thin Films Assembled with Polyelectrolytes and Clay. Polymers (Basel) 2022; 14:polym14204333. [PMID: 36297911 PMCID: PMC9607186 DOI: 10.3390/polym14204333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 10/06/2022] [Accepted: 10/10/2022] [Indexed: 11/06/2022] Open
Abstract
Multilayer thin film assembly by the layer-by-layer (LbL) technique offers an inexpensive and versatile route for the synthesis of functional nanomaterials. In the case of polymer-clay systems, however, the technique faces the challenges of low clay loading and lack of tunability of the film characteristics. This is addressed in the present work that achieves exponential growth in clay-containing polyelectrolyte films having high clay loading and tailored properties. Our approach involves the incorporation of a weak polyelectrolyte and a clay with relatively high charge density and small particle size. The system of investigation comprises poly(diallyldimethylammonium chloride) (PDDA) as the polycation and laponite clay and poly(acrylic acid) (PAA) or poly(sodium-4-styrene sulfonate) (PSS) as polyanions that are used alternately to create multilayers. Successful high clay loading and exponential growth were achieved by two different approaches of polyanion incorporation in the multilayers. A progressive increase in the degree of ionization of PAA was shown to contribute to the exponential growth. Our findings also include novel pathways to manipulate thickness, surface topography, and clay content. The strategy presented here can lead to novel approaches to fabricate tailor-made nanomaterials for distinct applications.
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4
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Aliakseyeu A, Ankner JF, Sukhishvili SA. Impact of Star Polyacid Branching on Polymer Diffusion within Multilayer Films. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aliaksei Aliakseyeu
- Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - John F. Ankner
- Spallation Neutron Source Second Target Station Project, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Svetlana A. Sukhishvili
- Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, United States
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5
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Eneh CI, Kastinen T, Oka S, Batys P, Sammalkorpi M, Lutkenhaus JL. Quantification of Water-Ion Pair Interactions in Polyelectrolyte Multilayers Using a Quartz Crystal Microbalance Method. ACS POLYMERS AU 2022; 2:287-298. [PMID: 35971421 PMCID: PMC9374166 DOI: 10.1021/acspolymersau.2c00008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
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Water existing within
thin polyelectrolyte multilayer (PEM) films
has significant influence on their physical, chemical, and thermal
properties, having implications for applications including energy
storage, smart coatings, and biomedical systems. Ionic strength, salt
type, and terminating layer are known to influence PEM swelling. However,
knowledge of water’s microenvironment within a PEM, whether
that water is affiliated with intrinsic or extrinsic ion pairs, remains
lacking. Here, we examine the influence of both assembly and post-assembly
conditions on the water–ion pair interactions of poly(styrene
sulfonate)/poly(diallyldimethylammonium) (PSS/PDADMA) PEMs in NaCl
and KBr. This is accomplished by developing a methodology in which
quartz crystal microbalance with dissipation monitoring is applied
to estimate the number of water molecules affiliated with an ion pair
(i), as well as the hydration coefficient, πsaltH2O. PSS/PDADMA PEMs are assembled in varying ionic strengths of either
NaCl and KBr and then exposed post-assembly to increasing ionic strengths
of matching salt type. A linear relationship between the total amount
of water per intrinsic ion pair and the post-assembly salt concentration
was obtained at post-assembly salt concentrations >0.5 M, yielding
estimates for both i and πsaltH2O. We observe higher
values of i and πsaltH2O in KBr-assembled PEMs due
to KBr being more effective in doping the assembly because of KBr’s
more chaotropic nature as compared to NaCl. Lastly, when PSS is the
terminating layer, i decreases in value due to PSS’s
hydrophobic nature. Classical and ab initio molecular
dynamics provide a microstructural view as to how NaCl and KBr interact
with individual polyelectrolytes and the involved water shells. Put
together, this study provides further insight into the understanding
of existing water microenvironments in PEMs and the effects of both
assembly and post-assembly conditions.
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Affiliation(s)
- Chikaodinaka I Eneh
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77840, United States
| | - Tuuva Kastinen
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, 00076 Aalto, Finland.,Faculty of Engineering and Natural Sciences, Chemistry & Advanced Materials, Tampere University, P.O. Box 541, 33014 Tampere, Finland.,Academy of Finland Center of Excellence in Life-Inspired Hybrid Materials (LIBER), Aalto University, P.O. Box 16100, 00076 Aalto, Finland
| | - Suyash Oka
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77840, United States
| | - Piotr Batys
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow 30-239, Poland
| | - Maria Sammalkorpi
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, 00076 Aalto, Finland.,Academy of Finland Center of Excellence in Life-Inspired Hybrid Materials (LIBER), Aalto University, P.O. Box 16100, 00076 Aalto, Finland.,Department of Bioproducts and Biosystems, Aalto University, P.O. Box 16100, 00076 Aalto, Finland
| | - Jodie L Lutkenhaus
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77840, United States.,Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77840, United States
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6
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Webber JL, Bradshaw-Hajek BH, Krasowska M, Beattie DA. Polyelectrolyte multilayer formation on protein layer supports. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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Sill A, Nestler P, Thran P, Helm CA. Dependence of PSS Diffusion in Multilayers of Entangled PDADMA on Temperature and Salt Concentration: More than One Diffusion Constant. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Annekatrin Sill
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Peter Nestler
- ZIK HIKE—Biomechanics, University of Greifswald, Fleischmannstr. 42, D-17489 Greifswald, Germany
| | - Peter Thran
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Christiane A. Helm
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
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Azinfar A, Neuber S, Vancova M, Sterba J, Stranak V, Helm CA. Self-Patterning Polyelectrolyte Multilayer Films: Influence of Deposition Steps and Drying in a Vacuum. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:10490-10498. [PMID: 34436900 DOI: 10.1021/acs.langmuir.1c01409] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Typically, laterally patterned films are fabricated by lithographic techniques, external fields, or di-block copolymer self-assembly. We investigate the self-patterning of polyelectrolyte multilayers, poly(diallyldimethylammonium) (PDADMA)/poly(styrenesulfonate) (PSS)short. The low PSS molecular weight (Mw(PSSshort) = 10.7 kDa) is necessary because PSSshort is somewhat mobile within a PDADMA/PSSshort film, as demonstrated by the exponential growth regime at the beginning of the PDADMA/PSSshort multilayer build-up. No self-patterning was observed when the PDADMA/PSS film consisted of only immobile polyelectrolytes. Atomic force microscopy images show that self-patterning begins when the film consists of seven deposited PDADMA/PSSshort bilayers. When more bilayers are added, the surface ribbing evolved into bands, and circular domains were finally observed. The mean distance between the surface structures increased monotonously with the film thickness, from 70 to 250 nm. Scanning electron microscopy images showed that exposure to vacuum resulted in thinning of the film and an increase in the mean distance between domains. The effect is weaker for PSSshort-terminated films than for PDADMA-terminated films. The mechanism leading to domain formation during film build-up and the effect of post-preparation treatment are discussed.
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Affiliation(s)
- Amir Azinfar
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Sven Neuber
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Marie Vancova
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branisovska 31, 37005Ceske Budejovice, Czech Republic
- Faculty of Science, University of South Bohemia, Branisovska 1760, 37005 Ceske Budejovice, Czech Republic
| | - Jan Sterba
- Faculty of Science, University of South Bohemia, Branisovska 1760, 37005 Ceske Budejovice, Czech Republic
| | - Vitezslav Stranak
- Faculty of Science, University of South Bohemia, Branisovska 1760, 37005 Ceske Budejovice, Czech Republic
| | - Christiane A Helm
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
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9
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Kulikouskaya V, Zhdanko T, Hileuskaya K, Kraskouski A, Zhura A, Skorohod H, Butkevich V, Pal K, Tratsyak S, Agabekov V. Physicochemical aspects of design of ultrathin films based on chitosan, pectin, and their silver nanocomposites with antiadhesive and bactericidal potential. J Biomed Mater Res A 2021; 110:217-228. [PMID: 34291871 DOI: 10.1002/jbm.a.37278] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/09/2021] [Accepted: 07/11/2021] [Indexed: 11/11/2022]
Abstract
Implant-related infection is one of the serious problems in regenerative medicine. Promising approach to overcome the problems caused by bacterial growth on the medical implants is their modification by bioactive coatings. A versatile technique for designing multilayer films with tailored characteristics at the nanometer scale is layer-by-layer assembly. In this study, multilayer films based on biopolymers (pectin and chitosan) and their nanocomposites with silver nanoparticles have been prepared and evaluated. The buildup of multilayers was monitored using the quartz crystal microbalance with dissipation technique. The morphology of the obtained films was investigated by atomic force microscopy. We have demonstrated that pectin-Ag-containing films were characterized by the linear growth and smooth defect-free surface. When pectin-Ag was substituted for the pectin in the multilayer systems, the properties of the formed coatings were significantly changed: the film rigidity and surface roughness increased, as well as the film growth acquired the parabolic character. All prepared multilayer films have shown antibacterial activity against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria. The significant decrease in the number of the adhered E. coli on the multilayer surface has been determined; moreover, many of the cells were misshapen with cytoplasm leaking. The prepared multilayer films showed a mild activity against S. aureus predominantly due to the antiadhesive effect. Our results indicate that antibacterial activity of biopolymer multilayers is determined by the film composition and physicochemical characteristics and can be associated with their antiadhesive and bactericidal behaviors.
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Affiliation(s)
- Viktoryia Kulikouskaya
- Laboratory of micro- and nanostructured systems, Institute of chemistry of new materials National academy of sciences of Belarus, 36 F. Skaryna str, Minsk, 220141, Belarus
| | - Tsimafei Zhdanko
- Laboratory of micro- and nanostructured systems, Institute of chemistry of new materials National academy of sciences of Belarus, 36 F. Skaryna str, Minsk, 220141, Belarus
| | - Kseniya Hileuskaya
- Laboratory of micro- and nanostructured systems, Institute of chemistry of new materials National academy of sciences of Belarus, 36 F. Skaryna str, Minsk, 220141, Belarus
| | - Aliaksandr Kraskouski
- Laboratory of micro- and nanostructured systems, Institute of chemistry of new materials National academy of sciences of Belarus, 36 F. Skaryna str, Minsk, 220141, Belarus
| | - Alexandr Zhura
- Department of Surgical Diseases, Belorussian State Medical University, 83 Dzerzhinski Ave, Minsk, 220116, Belarus
| | - Hennadiy Skorohod
- Department of Surgical Diseases, Belorussian State Medical University, 83 Dzerzhinski Ave, Minsk, 220116, Belarus
| | - Vasili Butkevich
- Department of Surgical Diseases, Belorussian State Medical University, 83 Dzerzhinski Ave, Minsk, 220116, Belarus
| | - Kunal Pal
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, India
| | - Stanislau Tratsyak
- Department of Surgical Diseases, Belorussian State Medical University, 83 Dzerzhinski Ave, Minsk, 220116, Belarus
| | - Vladimir Agabekov
- Laboratory of micro- and nanostructured systems, Institute of chemistry of new materials National academy of sciences of Belarus, 36 F. Skaryna str, Minsk, 220141, Belarus
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10
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Ciejka J, Grzybala M, Gut A, Szuwarzynski M, Pyrc K, Nowakowska M, Szczubiałka K. Tuning the Surface Properties of Poly(Allylamine Hydrochloride)-Based Multilayer Films. MATERIALS (BASEL, SWITZERLAND) 2021; 14:2361. [PMID: 34062785 PMCID: PMC8125107 DOI: 10.3390/ma14092361] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/24/2021] [Accepted: 04/29/2021] [Indexed: 11/17/2022]
Abstract
The layer-by-layer (LbL) method of polyelectrolyte multilayer (PEM) fabrication is extremely versatile. It allows using a pair of any oppositely charged polyelectrolytes. Nevertheless, it may be difficult to ascribe a particular physicochemical property of the resulting PEM to a structural or chemical feature of a single component. A solution to this problem is based on the application of a polycation and a polyanion obtained by proper modification of the same parent polymer. Polyelectrolyte multilayers (PEMs) were prepared using the LbL technique from hydrophilic and amphiphilic derivatives of poly(allylamine hydrochloride) (PAH). PAH derivatives were obtained by the substitution of amine groups in PAH with sulfonate, ammonium, and hydrophobic groups. The PEMs were stable in 1 M NaCl and showed three different modes of thickness growth: exponential, mixed exponential-linear, and linear. Their surfaces ranged from very hydrophilic to hydrophobic. Root mean square (RMS) roughness was very variable and depended on the PEM composition, sample environment (dry, wet), and the polymer constituting the topmost layer. Atomic force microscopy (AFM) imaging of the surfaces showed very different morphologies of PEMs, including very smooth, porous, and structured PEMs with micellar aggregates. Thus, by proper choice of PAH derivatives, surfaces with different physicochemical features (growth type, thickness, charge, wettability, roughness, surface morphology) were obtained.
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Affiliation(s)
- Justyna Ciejka
- Department of Engineering and Technology of Chemical Processes, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (A.G.); (M.N.)
- Virogenetics Laboratory of Virology, Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7A, 30-387 Krakow, Poland;
| | - Michal Grzybala
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland;
| | - Arkadiusz Gut
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (A.G.); (M.N.)
| | - Michal Szuwarzynski
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland;
| | - Krzysztof Pyrc
- Virogenetics Laboratory of Virology, Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7A, 30-387 Krakow, Poland;
| | - Maria Nowakowska
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (A.G.); (M.N.)
| | - Krzysztof Szczubiałka
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; (A.G.); (M.N.)
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11
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Theoretical Evaluation of Polyelectrolyte Layering during Layer-by-Layer Coating of Ultrafiltration Hollow Fiber Membranes. MEMBRANES 2021; 11:membranes11020106. [PMID: 33540874 PMCID: PMC7913055 DOI: 10.3390/membranes11020106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 01/22/2021] [Accepted: 01/27/2021] [Indexed: 11/16/2022]
Abstract
Layer-by-layer (LbL) modification of porous membranes for water filtration has become an active research field in the past few years. Different mechanisms regarding polyelectrolyte film growth, swelling and smoothing, transport through these films, etc., have been studied. Although there are conjectures, it is not yet fully understood where the polyelectrolyte layering takes place when modifying porous membranes, either within the pores or on top of the porous material. This study presents a theoretical approach to investigate the dominant layer buildup regime between pore-dominated vs. layer-dominated growth of polyelectrolytes on porous membranes without mechanically interfering or damaging the membrane material. For this, fouling mechanism processes are used as an analogy. The presented approach gives a new insight into layering conformation and might be helpful to investigate the interaction between the membrane surface and the PE film. Moreover, the MgSO4 rejection behavior of two types of modified membranes was investigated: one with an initial pore-dominated layer growth followed by a layer-dominated film growth; the other one with a completely layer-dominated film growth. The data confirm that a rejection for MgSO4 could only be achieved in the regime of layer-dominated film growth. Additionally, when layer-dominated film growth prevails from the early stages of the coating process, permeability values are higher at similar MgSO4 rejection rates compared to an initial pore-dominated and then layer-dominated film growth. Accordingly, the interaction between the membrane pore size and molecular weight of the polyelectrolytes in the coating solutions plays an important role during LbL coating.
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Liang Y, Gao F, Wang L, Lin S. In-situ monitoring of polyelectrolytes adsorption kinetics by electrochemical impedance spectroscopy: Application in fabricating nanofiltration membranes via layer-by-layer deposition. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118747] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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13
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Naas C, Scheler U, Lappan U. Influence of pH on the Growth and the Local Dynamics of Polyelectrolyte Multilayers. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c01756] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Carolin Naas
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
| | - Ulrich Scheler
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
| | - Uwe Lappan
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
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14
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Ghasemi M, Friedowitz S, Larson RG. Overcharging of polyelectrolyte complexes: an entropic phenomenon. SOFT MATTER 2020; 16:10640-10656. [PMID: 33084721 DOI: 10.1039/d0sm01466d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Overcharging in complex coacervation, in which a polyelectrolyte complex coacervate (PEC) initially containing equal moles of the cationic and anionic monomers absorbs a large excess of one type of polyelectrolyte species, is predicted using a recently developed thermodynamic model describing complexation through a combination of reversible ion binding on the chains and long-range electrostatic correlations. We show that overcharging is favored roughly equally by the translational entropy of released counterions and the binding entropy of polyelectrolytes in the polyelectrolyte complex, thus helping resolve competing explanations for overcharging in the literature. We find that the extent of overcharging is non-monotonic in the concentration of added salt and increases with both strength of ion-pairing between polyions and chain hydrophobicity. The predicted extent of overcharging of the PEC is directly compared with that of multilayers made of poly(diallyldimethylammonium), PDADMA, and poly(styrene-sulfonate), PSS, overcompensated by the polycation in two different salts: KBr and NaCl. Accounting for the specificity of salt ion interactions with the polyelectrolytes, we find good qualitative agreement between theory and experiment.
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Affiliation(s)
- Mohsen Ghasemi
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.
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15
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Sill A, Nestler P, Weltmeyer A, Paßvogel M, Neuber S, Helm CA. Polyelectrolyte Multilayer Films from Mixtures of Polyanions: Different Compositions in Films and Deposition Solutions. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01089] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Annekatrin Sill
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Peter Nestler
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Antonia Weltmeyer
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Malte Paßvogel
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Sven Neuber
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Christiane A. Helm
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
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16
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P. Nikhil Chandra, Mothi Krishna Mohan. Tailor-Made Polyelectrolyte Multilayers for the Removal of Obidoxime from Water in Microfiltration Process. MEMBRANES AND MEMBRANE TECHNOLOGIES 2020. [DOI: 10.1134/s2517751620020031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Morshed M, Zimmer A, Broch L, Alem H, Roizard D. PDMS membranes modified by polyelectrolyte multilayer deposition to improve OSN separation of diluted solutes in toluene. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116331] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Sánchez PA, Vögele M, Smiatek J, Qiao B, Sega M, Holm C. Atomistic simulation of PDADMAC/PSS oligoelectrolyte multilayers: overall comparison of tri- and tetra-layer systems. SOFT MATTER 2019; 15:9437-9451. [PMID: 31720676 DOI: 10.1039/c9sm02010a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
By employing large-scale molecular dynamics simulations of atomistically resolved oligoelectrolytes in aqueous solutions, we study in detail the first four layer-by-layer deposition cycles of an oligoelectrolyte multilayer made of poly(diallyl dimethyl ammonium chloride)/poly(styrene sulfonate sodium salt) (PDADMAC/PSS). The multilayers are grown on a silica substrate in 0.1 M NaCl electrolyte solutions and the swollen structures are then subsequently exposed to varying added salt concentration. We investigated the microscopic properties of the films, analyzing in detail the differences between three- and four-layer systems. Our simulations provide insights into the early stages of growth of a multilayer, which are particularly challenging for experimental observations. We found rather strong complexation of the oligoelectrolytes, with fuzzy layering of the film structure. The main charge compensation mechanism is for all cases intrinsic, whereas extrinsic compensation is relatively enhanced for the layer of the last deposition cycle. In addition, we quantified other fundamental observables of these systems, such as the film thickness, water uptake, and overcharge fractions for each deposition layer.
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Affiliation(s)
- Pedro A Sánchez
- Ural Federal University, 51 Lenin av., Ekaterinburg, 620000, Russian Federation. and Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, Germany
| | - Martin Vögele
- Department of Computer Science, Stanford University, Stanford, California, USA
| | - Jens Smiatek
- Institut für Computerphysik, Universität Stuttgart, 70569 Stuttgart, Germany
| | - Baofu Qiao
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois, USA
| | - Marcello Sega
- Forschungszentrum Jülich, Helmholtz Institute Erlangen-Nuremberg, Nuremberg, Germany
| | - Christian Holm
- Institut für Computerphysik, Universität Stuttgart, 70569 Stuttgart, Germany
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Mohamad HS, Neuber S, Helm CA. Surface Forces of Asymmetrically Grown Polyelectrolyte Multilayers: Searching for the Charges. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:15491-15499. [PMID: 31486657 DOI: 10.1021/acs.langmuir.9b01787] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Surface forces are used to investigate the polymer conformation and the surface charge of polyelectrolyte multilayers. Films are prepared from strong polyelectrolytes with low and high linear charge density at 0.1 M NaCl, namely poly(diallyldimethylammonium) (PDADMA) and poly(styrenesulfonate) (PSS). The multilayer has two growth regimes: in the beginning, the film can contain as many positive as negative monomers. After about 15 deposited layer pairs, a linear growth regime characterized by an excess of cationic PDADMA monomers occurs. Independent of the film composition, at preparation conditions, the film surface is flat, uncharged and partially hydrophobic. Surface force measurements at decreased ionic strength provide insight. For PSS-terminated films electrostatic forces are found. At the beginning of multilayer formation, the surface charge density is negative. However, in the linear growth regime it is positive and low (one charge per 200-400 nm2). This reversal of surface charge density of PSS-terminated films is attributed to excess PDADMA-monomers within the film. PDADMA terminated films show steric forces, chains protrude into the solution and form a pseudobrush, which scales as a polyelectrolyte brush with a low grafting density (1900 nm2 per chain). We suggest a model of polyelectrolyte multilayer formation: PDADMA with its low linear charge density adsorbs with weakly bound chains. Monovalent anions within the film compensate PDADMA monomer charges. When PSS adsorbs onto a PDADMA-terminated multilayer, PSS monomers replace monovalent anions. While electrostatic bonds are formed and dissolved within the polyelectrolyte multilayer, the surface charge density remains zero.
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Affiliation(s)
- Heba S Mohamad
- Institute of Physics , University of Greifswald , Felix-Hausdorff-Straße 6 , D-17489 Greifswald , Germany
| | - Sven Neuber
- Institute of Physics , University of Greifswald , Felix-Hausdorff-Straße 6 , D-17489 Greifswald , Germany
| | - Christiane A Helm
- Institute of Physics , University of Greifswald , Felix-Hausdorff-Straße 6 , D-17489 Greifswald , Germany
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20
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Sill A, Nestler P, Azinfar A, Helm CA. Tailorable Polyanion Diffusion Coefficient in LbL Films: The Role of Polycation Molecular Weight and Polymer Conformation. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01761] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Annekatrin Sill
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Peter Nestler
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Amir Azinfar
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
| | - Christiane A. Helm
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Straße 6, D-17489 Greifswald, Germany
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21
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Parakhonskiy BV, Parak WJ, Volodkin D, Skirtach AG. Hybrids of Polymeric Capsules, Lipids, and Nanoparticles: Thermodynamics and Temperature Rise at the Nanoscale and Emerging Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8574-8583. [PMID: 30964686 DOI: 10.1021/acs.langmuir.8b04331] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The importance of thermodynamics does not need to be emphasized. Indeed, elevated temperature processes govern not only industrial scale production but also self-assembly, chemical reaction, interaction between molecules, etc. Not surprisingly, biological processes typically take place at a specific temperature. Here, we look at possibilities to raise the localized temperature by a laser around noble-metal nanoparticles incorporated into shells of layer-by-layer polyelectrolyte microcapsules-freely suspended delivery vehicles in an aqueous solution, developed in the Department of Interfaces, Max Planck Institute of Colloids and Interfaces, headed by Helmuth Möhwald. Understanding the mechanisms of localized temperature rise is essential, that is why we analyze the influence of incident intensity, nanoparticle size, their distribution and aggregation state, as well as thermodynamics at the nanoscale. This leads us to scrutinize "global" (used for thermal encapsulation) versus "local" (used for release of encapsulated materials) temperature rise. Similar analysis is extended to planar polymeric coatings, the lipid membrane system of vesicles and cells, on which nanoparticles are adsorbed. Insights are provided into the mechanisms of physicochemical and biological effects, the nature of which has always been profoundly, interactively, and engagingly discussed in the Department of Interfaces. This analysis is combined with recent developments providing outlook and highlighting a broad range of emerging applications.
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Affiliation(s)
- Bogdan V Parakhonskiy
- Nano-BioTechnology Group, Department of Biotechnology, Faculty of Bioscience Engineering , Ghent University , 9000 Ghent , Belgium
| | - Wolfgang J Parak
- Center for Hybrid Nanostructures (CHyN), Fachberich Physik , University of Hamburg , D-22761 Hamburg , Germany
| | - Dmitry Volodkin
- School Science & Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Andre G Skirtach
- Nano-BioTechnology Group, Department of Biotechnology, Faculty of Bioscience Engineering , Ghent University , 9000 Ghent , Belgium
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22
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Zou Y, Song J, You X, Yao J, Xie S, Jin M, Wang X, Yan Z, Zhou G, Shui L. Interfacial Complexation Induced Controllable Fabrication of Stable Polyelectrolyte Microcapsules Using All-Aqueous Droplet Microfluidics for Enzyme Release. ACS APPLIED MATERIALS & INTERFACES 2019; 11:21227-21238. [PMID: 31091079 DOI: 10.1021/acsami.9b02788] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Water-in-water (w/w) emulsions are particularly advantageous for biomedical-related applications, such as cell encapsulation, bioreactors, biocompatible storage, and processing of biomacromolecules. However, due to ultralow interfacial tension, generation and stabilization of uniform w/w droplets are challenging. In this work, we report a strategy of creating stable and size-controllable w/w droplets that can quickly form polyelectrolyte microcapsules (PEMCs) in a microfluidic device. A three-phase (inner, middle, outer) aqueous system was applied to create a stream of inner phase, which could be broken into droplets via a mechanical perturbation frequency, with size determined by the stream diameter and vibration frequency. The interfacial complexation is formed via electrostatic interaction of polycations of poly(diallyldimethylammoniumchloride) with polyanions of polystyrene sodium sulfate in the inner and outer phases. With addition of negatively charged silica nanoparticles, the stability, permeability, and mechanical strength of the PEMC shell could be well manipulated. Prepared PEMCs were verified by encapsulating fluorescein isothiocyanate-labeled dextran molecules and stimuli-triggered release by varying the pH value or osmotic pressure. A model enzyme, trypsin, was successfully encapsulated into PEMCs and released without impairing their catalytic activity. These results highlight its potential applications for efficient encapsulation, storage, delivery, and release of chemical, biological, pharmaceutical, and therapeutic agents.
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Affiliation(s)
| | - Jing Song
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) , 2 Fusionopolis Way, Innovis, #08-03 , 138634 Singapore
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23
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Lappan U, Rau C, Naas C, Scheler U. Odd–Even Effect on Rotational Dynamics of Spin-Labeled Polyacid Chain Segments in Polyelectrolyte Multilayers. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00101] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Uwe Lappan
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
| | - Cindy Rau
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
| | - Carolin Naas
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
| | - Ulrich Scheler
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
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24
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Kozlovskaya V, Chen J, Zavgorodnya O, Hasan MB, Kharlampieva E. Multilayer Hydrogel Capsules of Interpenetrated Network for Encapsulation of Small Molecules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11832-11842. [PMID: 30188139 DOI: 10.1021/acs.langmuir.8b02465] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We report on a facile capsule-based platform for efficient encapsulation of a broad spectrum of hydrophilic compounds with molecular weight less than 1000 g mol-1. The encapsulated compounds extend from low-molecular-weight anionic Alexa Fluor 532 dye and cationic anticancer drug doxorubicin (DOX) to fluorescein isothiocyanate-dextrans with Mw ranging from 4000 to 40 000 g mol-1. The pH-sensitive hydrogel capsules with an interpenetrated network shell are synthesized by layer-by-layer assembly of poly(methacrylic acid) (PMAA, Mw = 150 000 g mol-1) and poly( N-vinylpyrrolidone) (PVPON, Mw = 1 300 000 g mol-1) on 5 μm silica microparticles followed by chemical cross-linking of the PMAA multilayers. Following core dissolution, the result is a hollow microcapsule with PVPON interpenetrated in the PMAA network. The capsules exhibit a reversible change in the diameter with a swelling ratio of 1.5 upon pH variation from 7.5 to 5.5. Capsules cross-linked for 4 h display high permeability toward molecules with molecular weight under 1000 g mol-1 at pH = 7.5 but exclude dextran molecules with Mw ≥ 40 000 g mol-1. Encapsulation of small molecules was achieved at pH = 7.5 followed by sealing the capsule wall with 40 000 g mol-1 dextran at pH = 5.5. This approach results in negatively charged molecules such as Alexa Fluor being entrapped within the capsule cavity, whereas positively charged molecules such as DOX are encapsulated within the negatively charged capsule shell. Considering the simple postloading approach, the ability to entrap both anionic and cationic small molecules, and the pH-responsiveness of the interpenetrated network in the physiologically relevant range, these capsules offer a versatile method for controlled delivery of multiple hydrophilic compounds.
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25
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Kelly KD, Fares HM, Abou Shaheen S, Schlenoff JB. Intrinsic Properties of Polyelectrolyte Multilayer Membranes: Erasing the Memory of the Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3874-3883. [PMID: 29560720 DOI: 10.1021/acs.langmuir.8b00336] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Polyelectrolyte multilayers (PEMUs) are ultrathin membranes made by alternating adsorption of oppositely charged polyelectrolytes on substrates. Although PEMUs have shown exceptional selectivity for certain ion-filtering applications, they usually contain an excess of one of the polyelectrolytes due to the history- and condition-dependent mode of PEMU assembly. This excess charge provides fixed sites for ion exchange, enhancing the concentration of oppositely charged ions. Thus, the ion-permselective properties of PEMUs cannot be compared unless they are assembled under identical conditions. This work demonstrates the enhanced permeability of PEMUs as-made from poly(diallyldimethylammonium) (PDADMA), and poly(styrene sulfonate) (PSS) to ferricyanide as an example of an anion. Annealing by NaCl followed by pairing of excess PDADMA with additional PSS produces an almost stoichiometric film that better reflects the intrinsic transport properties of PEMUs. This pairing, observed in real time using electrochemical methods, occurs at the PEMU/solution interface under countercurrent transport of PSS from solution and excess PDADMA paired with a counterion, termed PDADMA*, from the PEMU bulk. A quantitative comparison of PSS and PDADMA* diffusion reveals the conditions under which PEMU assembly depends on PSS molecular weight and concentration.
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Affiliation(s)
- Kristopher D Kelly
- Department of Chemistry and Biochemistry , The Florida State University , Tallahassee , Florida 32306-4390 , United States
| | - Hadi M Fares
- Department of Chemistry and Biochemistry , The Florida State University , Tallahassee , Florida 32306-4390 , United States
| | - Samir Abou Shaheen
- Department of Chemistry and Biochemistry , The Florida State University , Tallahassee , Florida 32306-4390 , United States
| | - Joseph B Schlenoff
- Department of Chemistry and Biochemistry , The Florida State University , Tallahassee , Florida 32306-4390 , United States
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26
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Selin V, Albright V, Ankner JF, Marin A, Andrianov AK, Sukhishvili SA. Biocompatible Nanocoatings of Fluorinated Polyphosphazenes through Aqueous Assembly. ACS APPLIED MATERIALS & INTERFACES 2018; 10:9756-9764. [PMID: 29505245 DOI: 10.1021/acsami.8b02072] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nonionic fluorinated polyphosphazenes, such as poly[bis(trifluoroethoxy)phosphazene] (PTFEP), display superb biocompatibility, yet their deposition to surfaces has been limited to solution casting from organic solvents or thermal molding. Herein, hydrophobic coatings of fluorinated polyphosphazenes are demonstrated through controlled deposition of ionic fluorinated polyphosphazenes (iFPs) from aqueous solutions using the layer-by-layer (LbL) technique. Specifically, the assemblies included poly[(carboxylatophenoxy)(trifluoroethoxy)phosphazenes] with varied content of fluorine atoms as iFPs (or poly[bis(carboxyphenoxy)phosphazene] (PCPP) as a control nonfluorinated polyphosphazene) and a variety of polycations. Hydrophobic interactions largely contributed to the formation of LbL films of iFPs with polycations, leading to linear growth and extremely low water uptake. Hydrophobicity-enhanced ionic pairing within iFP/BPEI assemblies gave rise to large-amplitude oscillations in surface wettability as a function of capping layer, which were the largest for the most fluorinated iFP, while control PCPP/polycation systems remained hydrophilic regardless of the film top layer. Neutron reflectometry (NR) studies indicated superior layering and persistence of such layering in salt solution for iFP/BPEI films as compared to control PCPP/polycation systems. Hydrophobicity of iFP-capped LbL coatings could be further enhanced by using a highly porous polyester surgical felt rather than planar substrates for film deposition. Importantly, iFP/polycation coatings displayed biocompatibility which was similar to or superior to that of solution-cast coatings of a clinically validated material (PTFEP), as demonstrated by the hemolysis of the whole blood and protein adsorption studies.
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Affiliation(s)
- Victor Selin
- Department of Materials Science & Engineering , Texas A&M University , College Station , Texas 77843 , United States
| | - Victoria Albright
- Department of Materials Science & Engineering , Texas A&M University , College Station , Texas 77843 , United States
| | - John F Ankner
- Spallation Neutron Source , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Alexander Marin
- Institute for Bioscience and Biotechnology Research , University of Maryland , Rockville , Maryland 20850 , United States
| | - Alexander K Andrianov
- Institute for Bioscience and Biotechnology Research , University of Maryland , Rockville , Maryland 20850 , United States
| | - Svetlana A Sukhishvili
- Department of Materials Science & Engineering , Texas A&M University , College Station , Texas 77843 , United States
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27
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Llamas S, Fernández-Peña L, Akanno A, Guzmán E, Ortega V, Ortega F, Csaky AG, Campbell RA, Rubio RG. Towards understanding the behavior of polyelectrolyte-surfactant mixtures at the water/vapor interface closer to technologically-relevant conditions. Phys Chem Chem Phys 2018; 20:1395-1407. [PMID: 29297520 DOI: 10.1039/c7cp05528e] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Polyelectrolyte-surfactant mixtures and their interactions with fluid interfaces are an important research field due to their use in technological applications. Most of the existing knowledge on these systems is based on models in which the polyelectrolyte concentration is around 50 times lower than that used in commercial formulations. The present work marks a step to close the gap on the understanding of their behavior under more practically-relevant conditions. The adsorption of concentrated mixtures of poly(diallyldimethyl-ammonium) chloride and sodium N-lauroyl-N-methyltaurate at the water/vapor interface with a crude mixing protocol has been studied by different surface tension techniques, Brewster angle microscopy, neutron reflectometry, and several bulk characterization techniques. Kinetically-trapped aggregates formed during mixing influence the interfacial morphology of mixtures produced in the equilibrium one-phase region, yet fluctuations in the surface tension isotherm result depending on the tensiometric technique applied. At low bulk surfactant concentrations, the free surfactant concentration is very low, and the interfacial composition matches the trend of the bulk complexes, which is a behavior that has not been observed in studies on more dilute mixtures. Nevertheless, a transition to synergistic co-adsorption of complexes and free surfactant is observed at the higher bulk surfactant concentrations studied. This transition appears to be a special feature of these more concentrated mixtures, which deserves attention in future studies of systems with additional components.
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Affiliation(s)
- Sara Llamas
- Departamento de Química Física I-Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain.
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28
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Selin V, Ankner JF, Sukhishvili SA. Ionically Paired Layer-by-Layer Hydrogels: Water and Polyelectrolyte Uptake Controlled by Deposition Time. Gels 2018; 4:E7. [PMID: 30674783 PMCID: PMC6321383 DOI: 10.3390/gels4010007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 12/28/2017] [Accepted: 01/08/2018] [Indexed: 01/18/2023] Open
Abstract
Despite intense recent interest in weakly bound nonlinear ("exponential") multilayers, the underlying structure-property relationships of these films are still poorly understood. This study explores the effect of time used for deposition of individual layers of nonlinearly growing layer-by-layer (LbL) films composed of poly(methacrylic acid) (PMAA) and quaternized poly-2-(dimethylamino)ethyl methacrylate (QPC) on film internal structure, swelling, and stability in salt solution, as well as the rate of penetration of invading polyelectrolyte chains. Thicknesses of dry and swollen films were measured by spectroscopic ellipsometry, film internal structure-by neutron reflectometry (NR), and degree of PMAA ionization-by Fourier-transform infrared spectroscopy (FTIR). The results suggest that longer deposition times resulted in thicker films with higher degrees of swelling (up to swelling ratio as high as 4 compared to dry film thickness) and stronger film intermixing. The stronger intermixed films were more swollen in water, exhibited lower stability in salt solutions, and supported a faster penetration rate of invading polyelectrolyte chains. These results can be useful in designing polyelectrolyte nanoassemblies for biomedical applications, such as drug delivery coatings for medical implants or tissue engineering matrices.
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Affiliation(s)
- Victor Selin
- Department of Materials Science & Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - John F Ankner
- Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
| | - Svetlana A Sukhishvili
- Department of Materials Science & Engineering, Texas A&M University, College Station, TX 77843, USA.
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29
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Lyu X, Peterson AM. The Princess and the Pea Effect: Influence of the first layer on polyelectrolyte multilayer assembly and properties. J Colloid Interface Sci 2017; 502:165-171. [DOI: 10.1016/j.jcis.2017.04.091] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 04/26/2017] [Accepted: 04/27/2017] [Indexed: 10/19/2022]
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30
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Xiao FX, Pagliaro M, Xu YJ, Liu B. Layer-by-layer assembly of versatile nanoarchitectures with diverse dimensionality: a new perspective for rational construction of multilayer assemblies. Chem Soc Rev 2017; 45:3088-121. [PMID: 27003471 DOI: 10.1039/c5cs00781j] [Citation(s) in RCA: 185] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Over the past few decades, layer-by-layer (LbL) assembly of multilayer thin films has garnered considerable interest on account of its ability to modulate nanometer control over film thickness and its extensive choice of usable materials for coating planar and particulate substrates, thus allowing for the fabrication of responsive and functional thin films for their potential applications in a myriad of fields. Herein, we provide elaborate information on the current developments of LbL assembly techniques including different properties, molecular interactions, and assembly methods associated with this promising bottom-up strategy. In particular, we highlight the principle for rational design and fabrication of a large variety of multilayer thin film systems including multi-dimensional capsules or spatially hierarchical nanostructures based on the LbL assembly technique. Moreover, we discuss how to judiciously choose the building block pairs when exerting the LbL assembly buildup which enables the engineering of multilayer thin films with tailor-made physicochemical properties. Furthermore, versatile applications of the diverse LbL-assembled nanomaterials are itemized and elucidated in light of specific technological fields. Finally, we provide a brief perspective and potential future challenges of the LbL assembly technology. It is anticipated that our current review could provide a wealth of guided information on the LbL assembly technique and furnish firm grounds for rational design of LbL assembled multilayer assemblies toward tangible applications.
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Affiliation(s)
- Fang-Xing Xiao
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62, Nanyang Drive, 637459, Singapore.
| | - Mario Pagliaro
- Istituto per lo Studio dei Materiali Nanostrutturati, CNR via U. La Malfa 153, 90146 Palermo, Italy.
| | - Yi-Jun Xu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, P. R. China and College of Chemistry, Fuzhou University, New Campus, Fuzhou 350108, P. R. China.
| | - Bin Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62, Nanyang Drive, 637459, Singapore.
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31
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Bellanger H, Casdorff K, Muff LF, Ammann R, Burgert I, Michen B. Layer-by-layer deposition on a heterogeneous surface: Effect of sorption kinetics on the growth of polyelectrolyte multilayers. J Colloid Interface Sci 2017; 500:133-141. [PMID: 28407597 DOI: 10.1016/j.jcis.2017.02.048] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 02/17/2017] [Accepted: 02/20/2017] [Indexed: 01/22/2023]
Abstract
Surface functionalization by means of controlled deposition of charged polymers or nanoparticles using the layer-by-layer (LbL) approach has been used to modify mostly engineered materials with well-defined surface chemistry and morphology. In this regard, natural and inhomogeneous interfaces have gained very little attention. Furthermore, natural substrates are susceptible to alterations by factors commonly used to control the growth of multilayers, such as pH, temperature and ionic strength. Here, we study the impact of sorption kinetics of a bilayer system (Poly(diallyldimethylammonium chloride) (PDDA) and Poly(sodium 4-styrenesulfonate) (PSS)) on a natural heterogeneous wood surface at neutral pH, without salt addition, on the multilayer buildup. To overcome analytical limitations we introduce a complementary approach based on UV reflectance spectroscopy, atomic force microscopy (AFM) and zeta potential measurements. Compared to immersion times used for ideal substrates, we found that a high surface coverage requires relatively long immersion, approximately 30min, into polyelectrolyte solutions, while a sufficient removal of polyelectrolyte excess during the washing step, requires even longer, about 100min. Based on these findings, we show that film growth can be controlled kinetically. Long immersion times provide well-defined and regular multilayers. The obtained data points to specific requirements to be considered when LbL treatments are applied to rough, porous and heterogeneous surfaces, and thereby sets a basis for a successful transfer of various surface functionalization approaches already shown on ideal surfaces.
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Affiliation(s)
- Hervé Bellanger
- Wood Materials Science, Institute for Building Materials, ETH Zürich, Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland; Applied Wood Materials, Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland.
| | - Kirstin Casdorff
- Wood Materials Science, Institute for Building Materials, ETH Zürich, Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland; Applied Wood Materials, Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland.
| | - Livius F Muff
- Wood Materials Science, Institute for Building Materials, ETH Zürich, Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland.
| | - Rebecca Ammann
- Wood Materials Science, Institute for Building Materials, ETH Zürich, Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland.
| | - Ingo Burgert
- Wood Materials Science, Institute for Building Materials, ETH Zürich, Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland; Applied Wood Materials, Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland.
| | - Benjamin Michen
- Wood Materials Science, Institute for Building Materials, ETH Zürich, Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland; Applied Wood Materials, Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland.
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Yu J, Meharg BM, Lee I. Adsorption and interlayer diffusion controlled growth and unique surface patterned growth of polyelectrolyte multilayers. POLYMER 2017. [DOI: 10.1016/j.polymer.2016.12.055] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mohammadi M, Salehi A, Branch RJ, Cygan LJ, Besirli CG, Larson RG. Growth Kinetics in Layer‐by‐Layer Assemblies of Organic Nanoparticles and Polyelectrolytes. Chemphyschem 2016; 18:128-141. [DOI: 10.1002/cphc.201600789] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 11/03/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Maziar Mohammadi
- Department of Mechanical Engineering University of Michigan Ann Arbor MI 48109 USA
| | - Ali Salehi
- Department of Chemical Engineering University of Michigan Ann Arbor MI 48109 USA
| | - Ryan J. Branch
- Department of Chemical Engineering University of Michigan Ann Arbor MI 48109 USA
| | - Lucas J. Cygan
- Department of Chemical Engineering University of Michigan Ann Arbor MI 48109 USA
| | - Cagri G. Besirli
- Department of Ophthalmology and Visual Sciences Kellogg Eye Center University of Michigan Ann Arbor MI 48105 USA
| | - Ronald G. Larson
- Department of Mechanical Engineering University of Michigan Ann Arbor MI 48109 USA
- Department of Chemical Engineering University of Michigan Ann Arbor MI 48109 USA
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Gaddes D, Jung H, Pena-Francesch A, Dion G, Tadigadapa S, Dressick WJ, Demirel MC. Self-Healing Textile: Enzyme Encapsulated Layer-by-Layer Structural Proteins. ACS APPLIED MATERIALS & INTERFACES 2016; 8:20371-20378. [PMID: 27419265 DOI: 10.1021/acsami.6b05232] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Self-healing materials, which enable an autonomous repair response to damage, are highly desirable for the long-term reliability of woven or nonwoven textiles. Polyelectrolyte layer-by-layer (LbL) films are of considerable interest as self-healing coatings due to the mobility of the components comprising the film. In this work mechanically stable self-healing films were fabricated through construction of a polyelectrolyte LbL film containing squid ring teeth (SRT) proteins. SRTs are structural proteins with unique self-healing properties and high elastic modulus in both dry and wet conditions (>2 GPa) due to their semicrystalline architecture. We demonstrate LbL construction of multilayers containing native and recombinant SRT proteins capable of self-healing defects. Additionally, we show these films are capable of utilizing functional biomolecules by incorporating an enzyme into the SRT multilayer. Urease was chosen as a model enzyme of interest to test its activity via fluorescence assay. Successful construction of the SRT films demonstrates the use of mechanically stable self-healing coatings, which can incorporate biomolecules for more complex protective functionalities for advanced functional fabrics.
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Affiliation(s)
| | | | | | - Genevieve Dion
- Westphal College of Media Arts and Design, Shima Seiki Haute Tech Lab at ExCITe, Drexel University , Philadelphia, Pennsylvania 19104, United States
| | | | - Walter J Dressick
- U.S. Naval Research Laboratory, Code 6910, 4555 Overlook Avenue, S.W., Washington, D.C. 20375, United States
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Tang K, Besseling NAM. Formation of polyelectrolyte multilayers: ionic strengths and growth regimes. SOFT MATTER 2016; 12:1032-1040. [PMID: 26565521 DOI: 10.1039/c5sm02118a] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This article presents a study of layer-by-layer (LbL) formation of poly-electrolyte multilayers (PEMs). Upon increasing ionic strength LbL growth patterns vary from linear for the lowest salt concentrations ([NaCl] = 0, 0.001, and 0.01 M) to exponential (for [NaCl] = 0.5 and 1 M). The slope of the linear growth at the lowest ionic strengths increases with increasing [NaCl]. During the LbL process at 0.5 M NaCl we observe a cross over from exponential to linear growth for which the slope is orders of magnitude larger than those observed at low salt concentrations. We provide a comprehensive interpretation of these growth behaviors, which are also reported for many other LbL PEM systems, based on the generic features of the phase diagram of aqueous solutions of mixtures of oppositely charged poly-electrolytes. Processes occurring in LbL formation of PEMs can be understood as moving in the direction of equilibrium, while never achieving it. The experimental model system in this study was: polydiallyldimethylammonium chloride/polystyrene sulfonate (PDADMAC/PSS). PEM formation was followed in situ by optical reflectometry in combination with well-controlled transport conditions (impinging jet stagnation point flow).
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Affiliation(s)
- Kan Tang
- Department of Chemical and Materials Engineering, University of Nevada, Nevada, USA
| | - Nicolaas A M Besseling
- Department Chemical Engineering/OMI, Delft University of Technology, Delft, Netherlands.
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Paßvogel M, Nestler P, Köhler R, Soltwedel O, Helm CA. Influence of Binary Polymer Mixtures on the Nonlinear Growth Regimes of Polyelectrolyte Multilayer Films. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b01674] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Malte Paßvogel
- Institut
für Physik, Ernst-Moritz-Arndt Universität, Felix-Hausdorff-Str. 6, D-17487 Greifswald, Germany
| | - Peter Nestler
- Institut
für Physik, Ernst-Moritz-Arndt Universität, Felix-Hausdorff-Str. 6, D-17487 Greifswald, Germany
| | - Ralf Köhler
- Institut
für Weiche Materie und funktionale Materialien, Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz
1, D-14109 Berlin, Germany
| | - Olaf Soltwedel
- Max Planck Institute
for Solid State Research, Heisenbergstr.
1, D-70569 Stuttgart, Germany
- Max Planck Society
Outstation at the Heinz-Maier-Leibnitz-Zentrum (MLZ), D-85747 Garching, Germany
| | - Christiane A. Helm
- Institut
für Physik, Ernst-Moritz-Arndt Universität, Felix-Hausdorff-Str. 6, D-17487 Greifswald, Germany
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37
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Nestler P, Paßvogel M, Ahrens H, Soltwedel O, Köhler R, Helm CA. Branched Poly(ethylenimine) as Barrier Layer for Polyelectrolyte Diffusion in Multilayer Films. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01065] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Peter Nestler
- Institut
für Physik, Ernst-Moritz-Arndt Universität Greifswald, Felix-Hausdorff-Str.
6, D-17487 Greifswald, Germany
| | - Malte Paßvogel
- Institut
für Physik, Ernst-Moritz-Arndt Universität Greifswald, Felix-Hausdorff-Str.
6, D-17487 Greifswald, Germany
| | - Heiko Ahrens
- Institut
für Physik, Ernst-Moritz-Arndt Universität Greifswald, Felix-Hausdorff-Str.
6, D-17487 Greifswald, Germany
| | - Olaf Soltwedel
- Max Planck Institute
for Solid State Research, Heisenbergstr.
1, D-70569 Stuttgart, Germany
- Max Planck Society
Outstation at FRM-II, Garching, Germany
| | - Ralf Köhler
- Institut
für Weiche Materie und funktionale Materialien, Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz
1, D-14109 Berlin, Germany
| | - Christiane A. Helm
- Institut
für Physik, Ernst-Moritz-Arndt Universität Greifswald, Felix-Hausdorff-Str.
6, D-17487 Greifswald, Germany
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38
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Kozlovskaya V, Zavgorodnya O, Ankner JF, Kharlampieva E. Controlling Internal Organization of Multilayer Poly(methacrylic acid) Hydrogels with Polymer Molecular Weight. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02019] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | | | - John F. Ankner
- Spallation
Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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Zerball M, Laschewsky A, von Klitzing R. Swelling of Polyelectrolyte Multilayers: The Relation Between, Surface and Bulk Characteristics. J Phys Chem B 2015; 119:11879-86. [PMID: 26267270 DOI: 10.1021/acs.jpcb.5b04350] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The odd-even effect, i.e., the influence of the outermost layer of polyelectrolyte multilayers (PEMs) on their swelling behavior, is investigated. For that purpose poly(styrene sodium sulfonate) (PSS)/poly(diallyl-dimethylammonium chloride) (PDADMAC) polyelectrolyte multilayers are studied in air with 1% relative humidity (RH), 30% RH, 95% RH, and in liquid water by ellipsometry, atomic force microscopy (AFM), and X-ray reflectometry (XRR). Since the total amount of water uptake in swollen PEMs is divided into two fractions, the void water and the swelling water, a correct evaluation of the odd-even effect is only possible if both fractions are examined separately. In order to allow measuring samples over a larger thickness regime the investigation of a larger amount of samples is required. Therefore, the concept of separating void water from swelling water using neutron reflectometry is for the first time transferred to ellipsometry. The subsequent analysis of swelling water, void water, and roughness revealed the existence of two types of odd-even effects: an odd-even effect which addresses only the surface of the PEM (surface-odd-even effect) and an odd-even effect which addresses also the bulk of the PEM (bulk-odd-even effect). The appearance of both effects is dependent on the environment; the surface-odd-even effect is only detectable in humid air while the bulk-odd-even effect is only detectable in liquid water. The bulk-odd-even effect is related to the osmotic pressure between the PEM and the surrounding water. A correlation between the amount of void water and both odd-even effects is not found. The amount of void water is independent of the terminated layer and the thickness of PEMs.
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Affiliation(s)
- Maximilian Zerball
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin , Strasse des 17. Juni 124, 10623 Berlin, Germany
| | - André Laschewsky
- Institut für Chemie, Universität Postdam , Karl-Liebknecht Strasse 24-25, 14476 Postdam-Golm, Germany.,Fraunhofer Institute of Applied Polymer Research , Geiselbergstrasse 69, 14476 Postdam-Golm, Germany
| | - Regine von Klitzing
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin , Strasse des 17. Juni 124, 10623 Berlin, Germany
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Wurster EC, Liebl R, Michaelis S, Robelek R, Wastl DS, Giessibl FJ, Goepferich A, Breunig M. Oligolayer-coated nanoparticles: impact of surface topography at the nanobio interface. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7891-900. [PMID: 25815610 DOI: 10.1021/am508435j] [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: 05/07/2023]
Abstract
Layer-by-layer coating of nanoparticles with a layer number in the single-digit range has gained increasing attention in the field of nanomedicinal research. However, the impact of using various polyelectrolytes on oligolayer formation and, more importantly, their influence on the interaction with the biological system has not often been considered in the past. Hence, we investigated the polyelectrolyte deposition profiles and resulting surface topographies of up to three polyelectrolyte layers on a flat gold sensor surface using three different polycations, namely, poly(ethylene imine) (PEI), poly(allylamine hydrochloride) (PAH), and poly(diallylammonium chloride) (PD), each in combination with poly(styrenesulfonate) (PSS). Surface plasmon resonance spectroscopy and atomic force microscopy revealed that the PEI/PSS pair in particular showed a so-called overshoot phenomenon, which is associated with partial polyelectrolyte desorption from the surface. This is also reflected by a significant increase in the surface roughness. Then, after having transferred the oligolayer assembly onto nanoparticles of ∼32 nm, we realized that quite similar surface topographies must have emerged on a curved gold surface. A major finding was that the extent of surface roughness contributes significantly to the fashion by which the oligolayer-coated nanoparticles interact with serum proteins and associate with cells. For example, for the PEI/PSS system, both the surface roughness and protein adsorption increased by a factor of ∼12 from the second to third coating layer and, at the same time, the cell association massively decreased to only one-third. Our study shows that surface roughness, along with other particle properties such as size, shape, zeta potential, and hydrophobicity, is another decisive factor for nanoparticles in a biological context, which has indeed been discussed previously but has not to date been investigated for oligolayers.
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Affiliation(s)
- Eva-Christina Wurster
- †Department for Pharmaceutical Technology, ‡Department for Analytical Chemistry and Biosensors, and ∥Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Renate Liebl
- †Department for Pharmaceutical Technology, ‡Department for Analytical Chemistry and Biosensors, and ∥Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Stefanie Michaelis
- †Department for Pharmaceutical Technology, ‡Department for Analytical Chemistry and Biosensors, and ∥Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Rudolf Robelek
- †Department for Pharmaceutical Technology, ‡Department for Analytical Chemistry and Biosensors, and ∥Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Daniel S Wastl
- †Department for Pharmaceutical Technology, ‡Department for Analytical Chemistry and Biosensors, and ∥Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Franz J Giessibl
- †Department for Pharmaceutical Technology, ‡Department for Analytical Chemistry and Biosensors, and ∥Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Achim Goepferich
- †Department for Pharmaceutical Technology, ‡Department for Analytical Chemistry and Biosensors, and ∥Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Miriam Breunig
- †Department for Pharmaceutical Technology, ‡Department for Analytical Chemistry and Biosensors, and ∥Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
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41
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Puhr JT, Swerdlow BE, Reid DK, Lutkenhaus JL. The effect of nanoparticle location and shape on thermal transitions observed in hydrated layer-by-layer assemblies. SOFT MATTER 2014; 10:8107-8115. [PMID: 25175949 DOI: 10.1039/c4sm01527d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanoparticles can have a profound effect on thermal transitions observed in polymer nanocomposites. Many layer-by-layer (LbL) assemblies contain nanoparticles for added functionality, but the resulting effects of nanoparticles on an LbL film's thermal properties are not known. Previously, we have shown that a nanoparticle-free LbL film containing strong polyelectrolytes, poly(diallyldimethylammonium chloride)/poly(styrene sulfonate) (PDAC/PSS), exhibited a single reversible thermal transition much like a glass-melt transition. In the work presented here, nanoparticles of either spherical (SiO2) or platelet (Laponite clay) shape are inserted at varying vertical locations throughout PDAC/PSS LbL films. Temperature-controlled quartz crystal microbalance (QCM-D) and modulated differential scanning calorimetry (MDSC) are applied, for which QCM-D proved to be more sensitive to the transition. All Laponite-containing films possess two thermal transitions. During growth, Laponite-containing films exhibit steady increases in dissipation, which is proposed to arise from mechanically decoupled regions separated by the Laponite nanoparticles. For SiO2-containing films, three transitions are detectable only when the SiO2 nanoparticles are placed in the middle of the film; no transitions are observed for SiO2 placed at the bottom or top, perhaps because of a weakening of the transition. The lowest transition is close in value to that of neat PDAC/PSS LbL films, and was assigned to a "bulk" response. The higher transition(s) is attributed to polymer chains in an interfacial region near the nanoparticle. We propose that nanoparticles restrict segmental mobility, thus elevating the transition temperature in the interfacial region.
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Affiliation(s)
- Joseph T Puhr
- Department of Materials Science & Engineering, Texas A&M University, College Station, TX 77843, USA.
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42
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Borges J, Mano JF. Molecular Interactions Driving the Layer-by-Layer Assembly of Multilayers. Chem Rev 2014; 114:8883-942. [DOI: 10.1021/cr400531v] [Citation(s) in RCA: 609] [Impact Index Per Article: 60.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- João Borges
- 3B’s
Research Group—Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra,
S. Cláudio do Barco 4806-909 Caldas das Taipas, Guimarães, Portugal
- ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - João F. Mano
- 3B’s
Research Group—Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra,
S. Cláudio do Barco 4806-909 Caldas das Taipas, Guimarães, Portugal
- ICVS/3B’s
− PT Government Associate Laboratory, Braga/Guimarães, Portugal
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43
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Micciulla S, Dodoo S, Chevigny C, Laschewsky A, von Klitzing R. Short versus long chain polyelectrolyte multilayers: a direct comparison of self-assembly and structural properties. Phys Chem Chem Phys 2014; 16:21988-98. [DOI: 10.1039/c4cp03439b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Optimization of the layer-by-layer growth of short chain (∼30 repeat units per chain) polyelectrolyte multilayers and comparison with classical long chain systems.
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Affiliation(s)
- Samantha Micciulla
- Stranski-Laboratorium
- Institut für Chemie
- Technische Universität Berlin
- D-10623 Berlin, Germany
| | - Samuel Dodoo
- Stranski-Laboratorium
- Institut für Chemie
- Technische Universität Berlin
- D-10623 Berlin, Germany
| | - Chloé Chevigny
- Stranski-Laboratorium
- Institut für Chemie
- Technische Universität Berlin
- D-10623 Berlin, Germany
| | - André Laschewsky
- Institut für Chemie
- Universität Potsdam
- 14476 Postdam-Golm, Germany
- Fraunhofer-Institut für Angewandte Polymerforschung
- , Germany
| | - Regine von Klitzing
- Stranski-Laboratorium
- Institut für Chemie
- Technische Universität Berlin
- D-10623 Berlin, Germany
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