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Anthi J, Kolivoška V, Holubová B, Vaisocherová-Lísalová H. Probing polymer brushes with electrochemical impedance spectroscopy: a mini review. Biomater Sci 2021; 9:7379-7391. [PMID: 34693954 DOI: 10.1039/d1bm01330k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Polymer brushes are frequently used as surface-tethered antifouling layers in biosensors to improve sensor surface-analyte recognition in the presence of abundant non-target molecules in complex biological samples by suppressing nonspecific interactions. However, because brushes are complex systems highly responsive to changes in their surrounding environment, studying their properties remains a challenge. Electrochemical impedance spectroscopy (EIS) is an emerging method in this context. In this mini review, we aim to elucidate the potential of EIS for investigating the physicochemical properties and structural aspects of polymer brushes. The application of EIS in brush-based biosensors is also discussed. Most common principles employed in these biosensors are presented, as well as interpretation of EIS data obtained in such setups. Overall, we demonstrate that the EIS-polymer brush pairing has a considerable potential for providing new insights into brush functionalities and designing highly sensitive and specific biosensors.
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Affiliation(s)
- Judita Anthi
- Institute of Physics of the CAS, Na Slovance 2, 182 21 Prague, Czech Republic. .,Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 16628 Prague, Czech Republic
| | - Viliam Kolivoška
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic.
| | - Barbora Holubová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 16628 Prague, Czech Republic
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2
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Yuan J, Wang Y. Conformation and Ionization Behavior of Charge-Regulating Polyelectrolyte Brushes in a Poor Solvent. J Phys Chem B 2021; 125:10589-10596. [PMID: 34494845 DOI: 10.1021/acs.jpcb.1c04451] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Understanding the structural response of weak polyelectrolyte brushes upon external stimuli is crucial for their applications ranging from modifying surface properties to the development of smart and intelligent materials. In this work, coarse-grained molecular dynamics simulations were carried out to investigate the conformation and ionization behavior of charge-regulating polyelectrolyte brushes under poor solvent conditions, using an implicit solvent model. The results show that, while the thickness of a sparse polyelectrolyte brush shows a similar behavior to that of a single chain, namely, a monotonic change as a function of solvent quality (modeled by an effective segment-segment attraction strength parameter) and solution pH, a dense polyelectrolyte brush exhibits more complex behavior. An unexpected reexpansion is observed when the effective segment-segment attraction strength is further increased, especially in the case of a high pH. In the latter case, strong attraction in polymer segments promotes the formation of large, interchain, cylindrical aggregates, leading to an increase in brush thickness.
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Affiliation(s)
- Jiaxing Yuan
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yanwei Wang
- Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr Avenue, Nur-Sultan 010000, Kazakhstan.,Laboratory of Computational Materials Science for Energy Applications, Center for Energy and Advanced Materials Science, National Laboratory Astana, 53 Kabanbay Batyr Avenue, Nur-Sultan 010000, Kazakhstan
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3
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Zein film as a novel natural biopolymer membrane in electrochemical detections. J Solid State Electrochem 2021. [DOI: 10.1007/s10008-021-04910-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Piccinini E, González GA, Azzaroni O, Battaglini F. Mass and charge transport in highly mesostructured polyelectrolyte/electroactive-surfactant multilayer films. J Colloid Interface Sci 2021; 581:595-607. [PMID: 32810726 DOI: 10.1016/j.jcis.2020.07.060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 07/10/2020] [Accepted: 07/11/2020] [Indexed: 10/23/2022]
Abstract
HYPOTHESIS Dimensionally stable electroactive films displaying spatially addressed redox sites is still a challenging goal due to gel-like structure. Polyelectrolyte and surfactants can yield highly mesostructured films using simple buildup strategies as layer-by-layer. The use of redox modified surfactants is expected to introduce order and an electroactive response in thin films. EXPERIMENTS The assembly of polyacrylic acid and different combinations of redox-modified and unmodified hexadecyltrimethylammonium bromide yields highly structured and electroactive thin films. The growth, viscoelastic properties, mass, and electron transport of these films were studied by combining electrochemical and quartz crystal balance with dissipation experiments. FINDINGS Our results show that the films are highly rigid and poorly hydrated. The mass and charge transport reveal that the ingress (egress) of the counter ions during the electrochemical oxidation (reduction) is accompanied with a small amount of water, which is close to their hydration sphere. Thus, the generated mesostructured films present an efficient charge transport with negligible changes in their structures during the electron transfer process. The control over the meso-organization and its stability represents a promising tool in the construction of devices where the vectorial transfer of electrons, or ions, is required.
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Affiliation(s)
- Esteban Piccinini
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) -Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Suc. 4, CC 16, La Plata, Argentina
| | - Graciela A González
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires - CONICET, Ciudad Universitaria, Pabellón 2 C1428EHA, Buenos Aires, Argentina
| | - Omar Azzaroni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) -Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Suc. 4, CC 16, La Plata, Argentina.
| | - Fernando Battaglini
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires - CONICET, Ciudad Universitaria, Pabellón 2 C1428EHA, Buenos Aires, Argentina.
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5
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Li Y, Chen X, Geng H, Dong Y, Wang B, Ma Z, Pan L, Ma G, Song D, Li Y. Oxidation Control of Bottlebrush Molecular Conformation for Producing Libraries of Photonic Structures. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011702] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yu‐Lian Li
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Xi Chen
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | | | - Yun Dong
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Bin Wang
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Zhe Ma
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Li Pan
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Gui‐Qiu Ma
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Dong‐Po Song
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Yue‐Sheng Li
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
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6
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Li Y, Chen X, Geng H, Dong Y, Wang B, Ma Z, Pan L, Ma G, Song D, Li Y. Oxidation Control of Bottlebrush Molecular Conformation for Producing Libraries of Photonic Structures. Angew Chem Int Ed Engl 2020; 60:3647-3653. [DOI: 10.1002/anie.202011702] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/29/2020] [Indexed: 11/12/2022]
Affiliation(s)
- Yu‐Lian Li
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Xi Chen
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | | | - Yun Dong
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Bin Wang
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Zhe Ma
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Li Pan
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Gui‐Qiu Ma
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Dong‐Po Song
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
| | - Yue‐Sheng Li
- Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Tianjin 300350 China
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7
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Lin HT, Venault A, Chang Y. Reducing the pathogenicity of wastewater with killer vapor-induced phase separation membranes. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118543] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Su Y, Luo H, Tong Z. Poly(ε‐caprolactone) Single Crystals with Different Aspect Ratios Mediated by Counterion Exchange on the Basis of Hofmeister Series. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Yawei Su
- Department of Polymer MaterialsZhejiang Sci‐Tech University Hangzhou 310018 China
| | - Haipeng Luo
- Department of Polymer MaterialsZhejiang Sci‐Tech University Hangzhou 310018 China
| | - Zaizai Tong
- Department of Polymer MaterialsZhejiang Sci‐Tech University Hangzhou 310018 China
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9
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Igata K, Sakamaki T, Inutsuka Y, Higaki Y, Okajima MK, Yamada NL, Kaneko T, Takahara A. Cationic Polymer Brush/Giant Polysaccharide Sacran Assembly: Structure and Lubricity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:6494-6501. [PMID: 32393028 DOI: 10.1021/acs.langmuir.0c00854] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A highly effective aqueous lubrication strategy employing electrostatic assembly of a negatively charged ultrahigh molecular weight natural polysaccharide named "sacran" and a positively charged poly[2-(methacryloyloxy)ethyltrimethylammonium chloride] (PMTAC) brush was investigated. The PMTAC brush was compressed through the adsorption of sacran to produce the layered structure of a PMTAC brush/sacran hybrid bottom layer and a poorly hydrated sacran top layer. The dynamic friction coefficients of the PMTAC brush were drastically reduced in salt-free sacran aqueous solutions, and the lubrication mode transition from the brush-lubrication regime to hydrodynamic lubrication was promoted. The electrostatic assembly was inhibited by the addition of NaCl into the lubricant solutions, leading to the loss of the lubrication effect. The hydrodynamic lubrication would be encouraged by the local viscosity enhancement at the friction boundary due to the poorly hydrated and highly viscous PMTAC brush/sacran hybrid film produced by the spontaneous electrostatic assembly.
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Affiliation(s)
- Kosuke Igata
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tatsunori Sakamaki
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshihiro Inutsuka
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yuji Higaki
- Department of Integrated Science and Technology, Faculty of Science and Technology, Oita University, 700 Dannoharu, Oita 870-1192, Japan
| | - Maiko K Okajima
- Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi-shi, Ishikawa 923-1292, Japan
| | - Norifumi L Yamada
- Neutron Science Laboratory, High Energy Accelerator Research Organization, Ibaraki 319-1106, Japan
| | - Tatsuo Kaneko
- Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi-shi, Ishikawa 923-1292, Japan
| | - Atsushi Takahara
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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10
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Yuan H, Liu G. Ionic effects on synthetic polymers: from solutions to brushes and gels. SOFT MATTER 2020; 16:4087-4104. [PMID: 32292998 DOI: 10.1039/d0sm00199f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The ionic effects on synthetic polymers have attracted extensive attention due to the crucial role of ions in the determination of the properties of synthetic polymers. This review places the focus on specific ion effects, multivalent ion effects, and ionic hydrophilicity/hydrophobicity effects in synthetic polymer systems from solutions to brushes and gels. The specific ion effects on neutral polymers are determined by both the direct and indirect specific ion-polymer interactions, whereas the ion specificities of charged polymers are mainly dominated by the specific ion-pairing interactions. The ionic cross-linking effect exerted by the multivalent ions is widely used to tune the properties of polyelectrolytes, while the reentrant behavior of polyelectrolytes in the presence of multivalent ions still remains poorly understood. The ionic hydrophilicity/hydrophobicity effects not only can be applied to make strong polyelectrolytes thermosensitive, but also can be used to prepare polymeric nano-objects and to control the wettability of polyelectrolyte brush-modified surfaces. The not well-studied ionic hydrogen bond effects are also discussed in the last section of this review.
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Affiliation(s)
- Haiyang Yuan
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, No. 96, Jinzhai Road, Hefei 230026, P. R. China.
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11
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Herrera SE, Agazzi ML, Cortez ML, Marmisollé WA, Tagliazucchi M, Azzaroni O. Redox-active polyamine-salt aggregates as multistimuli-responsive soft nanoparticles. Phys Chem Chem Phys 2020; 22:7440-7450. [PMID: 32215420 DOI: 10.1039/d0cp00077a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyamine-salt aggregates have become promising soft materials in nanotechnology due to their easy preparation process and pH-responsiveness. Here, we report the use of hexacyanoferrate(ii) and hexacyanoferrate(iii) as electroactive crosslinking agents for the formation of nanometer-sized redox-active polyamine-redox-salt aggregates (rPSA) in bulk suspension. This nanoplatform can be selectively assembled or disassembled under different stimuli such as redox environment, pH and ionic strength. By changing the charge of the building blocks, external triggers allow switching the system between two phase states: aggregate-free solution or colloidal rPSA dispersion. The stimuli-activated modulation of the assembly/disassembly processes opens a path to exploit rPSA in technologies based on smart nanomaterials.
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Affiliation(s)
- Santiago E Herrera
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Sucursal 4, Casilla de Correo 16, 1900 La Plata, Argentina.
| | - Maximiliano L Agazzi
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Sucursal 4, Casilla de Correo 16, 1900 La Plata, Argentina.
| | - M Lorena Cortez
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Sucursal 4, Casilla de Correo 16, 1900 La Plata, Argentina.
| | - Waldemar A Marmisollé
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Sucursal 4, Casilla de Correo 16, 1900 La Plata, Argentina.
| | - Mario Tagliazucchi
- Departamento de Química Inorgánica, Analítica y Química Física, INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, Buenos Aires C1428EHA, Argentina
| | - Omar Azzaroni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Sucursal 4, Casilla de Correo 16, 1900 La Plata, Argentina.
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12
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Yuan J, Antila HS, Luijten E. Structure of Polyelectrolyte Brushes on Polarizable Substrates. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02749] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiaxing Yuan
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hanne S. Antila
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- Department of Theory and Bio-Systems, Max Planck Institute of Colloids and Interfaces, 14476 Potsdam, Germany
| | - Erik Luijten
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- Department of Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, Illinois 60208, United States
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
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13
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Poling-Skutvik R, Di X, Osuji CO. Correlation of droplet elasticity and volume fraction effects on emulsion dynamics. SOFT MATTER 2020; 16:2574-2580. [PMID: 32083258 DOI: 10.1039/c9sm02394a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The rheological properties of emulsions are of considerable importance in a diverse range of scenarios. Here we describe a superposition of the effects of droplet elasticity and volume fraction on the dynamics of emulsions. The superposition is governed by physical interactions between droplets, and provides a new mechanism for modifying the flow behavior of emulsions, by controlling the elasticity of the dispersed phase. We investigate the properties of suspensions of emulsified wormlike micelles (WLM). Dense suspensions of the emulsified WLM droplets exhibit thermally responsive properties in which the viscoelastic moduli decrease by an order of magnitude over a temperature range of 0 °C to 25 °C. Surprisingly, the dependence of modulus on volume fraction is independent of droplet stiffness. Instead, the emulsion modulus scales as a power-law with volume fraction with a constant exponent across all temperatures even as the droplet properties change from elastic to viscous. Nevertheless, the underlying droplet dynamics depend strongly on temperature. From stress relaxation experiments, we quantify droplet dynamics across the cage breaking time scale below which the droplets are locally caged by neighbors and above which the droplets escape their cages to fully relax. For elastic droplets and high volume fractions, droplets relax less stress on short time scales and the terminal relaxations are slower than for viscous droplets and lower volume fractions. Characteristic measures of the short and long-time dynamics are highly correlated for variations in both temperature and emulsion concentration, suggesting that thermal and volume fraction effects represent independent parameters to control emulsion properties.
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Affiliation(s)
- Ryan Poling-Skutvik
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
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14
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Cai H, Kou R, Liu G. Counterion-Tunable Thermosensitivity of Strong Polyelectrolyte Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:16862-16868. [PMID: 31774295 DOI: 10.1021/acs.langmuir.9b02982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, poly(sodium styrene sulfonate) brushes have been employed as a precursor to prepare thermosensitive strong polyelectrolyte brushes (SPBs) through a counterion exchange strategy. The substitution of hydrophilic Na+ counterions by hydrophobic tetraalkylphosphonium counterions leads to a thermoresponsivity of the SPBs. The thermosensitive properties including hydration, stiffness, and surface water wettability of the SPBs can be modulated by the type of the tetraalkylphosphonium counterions. Nevertheless, the wet thickness of the SPBs with tetraalkylphosphonium counterions does not exhibit an obvious temperature dependency due to the high steric barrier in the crowded environment of SPBs generated by the large tetraalkylphosphonium counterions. The mixtures of small Na+ counterions and large tetraalkylphosphonium counterions are employed to realize the thermosensitive wet thickness without sacrificing other thermoresponsive properties of the SPBs because the mixed counterions can bring both a certain hydrophobicity and some free space to the brushes. This work opens up the opportunities available for the use of counterions to tune the thermosensitivity of SPBs.
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Affiliation(s)
- Hongtao Cai
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics , University of Science and Technology of China , No. 96, JinZhai Road , Hefei 230026 , P. R. China
| | - Ran Kou
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics , University of Science and Technology of China , No. 96, JinZhai Road , Hefei 230026 , P. R. China
| | - Guangming Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics , University of Science and Technology of China , No. 96, JinZhai Road , Hefei 230026 , P. R. China
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15
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Bui HL, Huang CJ. Tough Polyelectrolyte Hydrogels with Antimicrobial Property via Incorporation of Natural Multivalent Phytic Acid. Polymers (Basel) 2019; 11:E1721. [PMID: 31640149 PMCID: PMC6835581 DOI: 10.3390/polym11101721] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/14/2019] [Accepted: 10/16/2019] [Indexed: 01/08/2023] Open
Abstract
Tough and antimicrobial dual-crosslinked poly((trimethylamino)ethyl methacrylate chloride)-phytic acid hydrogel (pTMAEMA-PA) has been synthesized by adding a chemical crosslinker and docking a physical crosslinker of multivalent phytic acid into a cationic polyelectrolyte network. By increasing the loading concentration of PA, the tough hydrogel exhibits compressive stress of >1 MPa, along with high elasticity and fatigue-resistant properties. The enhanced mechanical properties of pTMAEMA-PA stem from the multivalent ion effect of PA via the formation of ion bridges within polyelectrolytes. In addition, a comparative study for a series of pTMAEMA-counterion complexes was conducted to elaborate the relationship between swelling ratio and mechanical strength. The study also revealed secondary factors, such as ion valency, ion specificity and hydrogen bond formation, holding crucial roles in tuning mechanical properties of the polyelectrolyte hydrogel. Furthermore, in bacteria attachment and disk diffusion tests, pTMAEMA-PA exhibits superior fouling resistance and antibacterial capability. The results reflect the fact that PA enables chelating strongly with divalent metal ions, hence, disrupting the outer membrane of bacteria, as well as dysfunction of organelles, DNA and protein. Overall, the work demonstrated a novel strategy for preparation of tough polyelectrolyte with antibacterial capability via docking PA to open up the potential use of PA in medical application.
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Affiliation(s)
- Hoang Linh Bui
- Department of Biomedical Sciences and Engineering, National Central University, Taoyuan 32023, Taiwan.
| | - Chun-Jen Huang
- Department of Biomedical Sciences and Engineering, National Central University, Taoyuan 32023, Taiwan.
- Department of Chemical and Materials Engineering, National Central University, Taoyuan 32023, Taiwan.
- R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 32023, Taiwan.
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16
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Faubel JL, Patel RP, Wei W, Curtis JE, Brettmann BK. Giant Hyaluronan Polymer Brushes Display Polyelectrolyte Brush Polymer Physics Behavior. ACS Macro Lett 2019; 8:1323-1327. [PMID: 35651165 DOI: 10.1021/acsmacrolett.9b00530] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Polyelectrolyte brushes are important stimuli-responsive materials in a variety of technological applications as well as in biological systems. Their small size, however, introduces characterization challenges, particularly in studying 3D structure and time-dependent behavior. In this Letter, we report on the polyelectrolyte brush behavior of extra-large hyaluronan brushes (∼15 μm) recently developed using an enzyme-mediated growth process. In response to increasing ionic strength, the brush displays the osmotic brush regime and the salted brush regime. We also show a collapse of 96% when the brush is placed in a poor solvent. This collapse is rapid when changing from a good to poor solvent, but re-expansion is slow when changing back to a good solvent. The observed brush behavior described in this Letter is similar to that seen for smaller polyelectrolyte brushes, indicating that these larger brushes may serve as model systems to study more complex phenomena through confocal microscopy.
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Hollingsworth NR, Wilkanowicz SI, Larson RG. Salt- and pH-induced swelling of a poly(acrylic acid) brush via quartz crystal microbalance w/dissipation (QCM-D). SOFT MATTER 2019; 15:7838-7851. [PMID: 31528970 DOI: 10.1039/c9sm01289c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We infer the swelling/de-swelling behavior of weakly ionizable poly(acrylic acid) (PAA) brushes of 2-39 kDa molar mass in the presence of KCl concentrations from 0.1-1000 mM, pH = 3, 7, and 9, and grafting densities σ = 0.12-2.15 chains per nm2 using a Quartz Crystal Microbalance with Dissipation (QCM-D), confirming and extending the work of Wu et al. to multiple chain lengths. At pH 7 and 9 (above the pKa ∼ 5), the brush initially swells at low KCl ionic strength (<10 mM) in the "osmotic brush" regime, and de-swells at higher salt concentrations, in the "salted brush" regime, and is relatively unaffected at pH 3, below the pKa, as expected. At pH 7, at low and moderate grafting densities, our results in the high-salt "salted brush" regime (Cs > 10 mM salt) agree with the predicted scaling H ∼ Nσ+1/3Cs-1/3 of brush height H, while in the low-salt "osmotic brush" regime (Cs < 10 mM salt), we find H ∼ Nσ+1/3Cs+0.28-0.38, whose dependence on Cs agrees with scaling theory for this regime, but the dependence on σ strongly disagrees with it. The predicted linearity in the degree of polymerization N is confirmed. The new results partially confirm scaling theory and clarify where improved theories and additional data are needed.
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Affiliation(s)
- Nisha R Hollingsworth
- Department of Macromolecular Science & Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.
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18
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Moreno-Guerra JA, Romero-Sánchez IC, Martinez-Borquez A, Tassieri M, Stiakakis E, Laurati M. Model-Free Rheo-AFM Probes the Viscoelasticity of Tunable DNA Soft Colloids. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1904136. [PMID: 31460707 DOI: 10.1002/smll.201904136] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Indexed: 05/23/2023]
Abstract
Atomic force microscopy rheological measurements (Rheo-AFM) of the linear viscoelastic properties of single, charged colloids having a star-like architecture with a hard core and an extended, deformable double-stranded DNA (dsDNA) corona dispersed in aqueous saline solutions are reported. This is achieved by analyzing indentation and relaxation experiments performed on individual colloidal particles by means of a novel model-free Fourier transform method that allows a direct evaluation of the frequency-dependent linear viscoelastic moduli of the system under investigation. The method provides results that are consistent with those obtained via a conventional fitting procedure of the force-relaxation curves based on a modified Maxwell model. The outcomes show a pronounced softening of the dsDNA colloids, which is described by an exponential decay of both the Young's and the storage modulus as a function of the salt concentration within the dispersing medium. The strong softening is related to a critical reduction of the size of the dsDNA corona, down to ≈70% of its size in a salt-free solution. This can be correlated to significant topological changes of the dense star-like polyelectrolyte forming the corona, which are induced by variations in the density profile of the counterions. Similarly, a significant reduction of the stiffness is obtained by increasing the length of the dsDNA chains, which we attribute to a reduction of the DNA density in the outer region of the corona.
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Affiliation(s)
- José A Moreno-Guerra
- División de Ciencias e Ingenierías, Universidad de Guanajuato, Lomas del Bosque 103, 37150, León, Mexico
| | - Ivany C Romero-Sánchez
- División de Ciencias e Ingenierías, Universidad de Guanajuato, Lomas del Bosque 103, 37150, León, Mexico
| | - Alejandro Martinez-Borquez
- División de Ciencias e Ingenierías, Universidad de Guanajuato, Lomas del Bosque 103, 37150, León, Mexico
| | - Manlio Tassieri
- Division of Biomedical Engineering, School of Engineering, University of Glasgow, Glasgow, G12 8LT, UK
| | - Emmanuel Stiakakis
- Forschungszentrum Jülich, Institute of Complex Systems 3, Leo-Brandt-Strasse, 52425, Jülich, Germany
| | - Marco Laurati
- División de Ciencias e Ingenierías, Universidad de Guanajuato, Lomas del Bosque 103, 37150, León, Mexico
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19
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Teschke O, Roberto de Castro J, Soares DM. Imaging Ion Pairs Forming Structural Arrangements in Interfacial Regions. ACS OMEGA 2019; 4:15684-15693. [PMID: 31572871 PMCID: PMC6761755 DOI: 10.1021/acsomega.9b02299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 08/29/2019] [Indexed: 06/10/2023]
Abstract
A technique to image ion pairs in solution is reported. We investigated structural and dynamic properties of ion-pair distributions deposited on highly oriented pyrolytic graphite (HOPG) surfaces in electrolyte solutions. Atomic force microscopy images of HOPG immersed in NaCl and KCl solutions display regular arrangements on top of the hexagonal carbon rings forming the HOPG atomic structure. These arrangements are the result of the low value of the aqueous interfacial dielectric constant (εr ≈ 3-11). The measured ion-pair radius is a function of the salt present in the solution; for KCl, the ion-pair radius is equal or smaller than 0.42 nm; for NaCl, the ion-pair radius is 0.36 nm. A comparison of these values with their crystalline lattice dimensions indicates that both KCl and NaCl ion pairs in solution at the HOPG/solution interfacial region exist as tight contact ion pairs in quasistationary distributions. The NaCl ion-pair distribution forms an aligned arrangement, and the KCl distribution is formed by intercalated pairs.
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Affiliation(s)
- Omar Teschke
- E-mail: . Phone: 55 (19) 3521-4148Fax: 55 (19) 3521-5637
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20
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Piccinini E, Bliem C, Giussi JM, Knoll W, Azzaroni O. Reversible Switching of the Dirac Point in Graphene Field-Effect Transistors Functionalized with Responsive Polymer Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8038-8044. [PMID: 31094531 DOI: 10.1021/acs.langmuir.9b00910] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The reversible control of the graphene Dirac point using external chemical stimuli is of major interest in the development of advanced electronic devices such as sensors and smart logic gates. Here, we report the coupling of chemoresponsive polymer brushes to reduced graphene oxide (rGO)-based field-effect transistors to modulate the graphene Dirac point in the presence of specific divalent cations. Poly[2-(methacryloyloxy)ethyl] phosphate (PMEP) brushes were grown on the transistor channel by atom transfer radical polymerization initiated from amine-pyrene linkers noncovalently attached to rGO surfaces. Our results show an increase in the Dirac point voltage due to electrostatic gating effects upon the specific binding of Ca2+ and Mg2+ to the PMEP brushes. We demonstrate that the electrostatic gating is reversibly controlled by the charge density of the polymer brushes, which depends on the divalent cation concentration. Moreover, a theoretical formalism based on the Grahame equation and a Langmuir-type binding isotherm is presented to obtain the PMEP-cation association constant from the experimental data.
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Affiliation(s)
- Esteban Piccinini
- Departamento de Química, Facultad de Ciencias Exactas , Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata (UNLP), CONICET , Suc. 4-C.C.16, 1900 La Plata , Argentina
| | | | - Juan M Giussi
- Departamento de Química, Facultad de Ciencias Exactas , Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata (UNLP), CONICET , Suc. 4-C.C.16, 1900 La Plata , Argentina
| | | | - Omar Azzaroni
- Departamento de Química, Facultad de Ciencias Exactas , Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de La Plata (UNLP), CONICET , Suc. 4-C.C.16, 1900 La Plata , Argentina
- CEST-UNLP Partner Lab for Bioelectronics , Diagonal 64 y 113 , La Plata 1900 , Argentina
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21
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Santos DES, Li D, Ramstedt M, Gautrot JE, Soares TA. Conformational Dynamics and Responsiveness of Weak and Strong Polyelectrolyte Brushes: Atomistic Simulations of Poly(dimethyl aminoethyl methacrylate) and Poly(2-(methacryloyloxy)ethyl trimethylammonium chloride). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5037-5049. [PMID: 30869897 DOI: 10.1021/acs.langmuir.8b04268] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The complex solution behavior of polymer brushes is key to control their properties, including for biomedical applications and catalysis. The swelling behavior of poly(dimethyl aminoethyl methacrylate) (PDMAEMA) and poly(2-(methacryloyloxy)ethyl trimethylammonium chloride) (PMETAC) in response to changes in pH, solvent, and salt types has been investigated using atomistic molecular dynamics simulations. PDMAEMA and PMETAC have been selected as canonical models for weak and strong polyelectrolytes whose complex conformational behavior is particularly challenging for the development and validation of atomistic models. The GROMOS-derived atomic parameters reproduce the experimental swelling coefficients obtained from ellipsometry measurements for brushes of 5-15 nm thickness. The present atomistic models capture the protonated morphology of PDMAEMA, the swollen and collapsed conformations of PDMAEMA and PMETAC in good and bad solvents, and the salt-selective response of PMETAC. The modular nature of the molecular models allows for the simple extension of atomic parameters to a variety of polymers or copolymers.
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Affiliation(s)
- Denys E S Santos
- Departamento de Química Fundamental , Universidade Federal de Pernambuco , Cidade Universitária, 50670-901 Recife , Brazil
| | | | | | | | - Thereza A Soares
- Departamento de Química Fundamental , Universidade Federal de Pernambuco , Cidade Universitária, 50670-901 Recife , Brazil
- Department of Chemistry , Umeå University , 90187 Umeå , Sweden
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22
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Liu G. Tuning the Properties of Charged Polymers at the Solid/Liquid Interface with Ions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3232-3247. [PMID: 29806944 DOI: 10.1021/acs.langmuir.8b01158] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In conventional theories, where ions are treated as point charges, the properties of charged polymers can be tuned using ions via the ionic strength. However, this article will show that the properties of charged polymers at the solid/liquid interface, including charged polymer brushes and polyelectrolyte multilayers, can be tuned by ions beyond ionic strength effects. Ion specificity, multivalency, ionic hydrogen bonding, and ionic hydrophobicity/hydrophilicity are used to tune a range of properties of charged polymers at the solid/liquid interface such as hydration, conformation, stiffness, surface wettability, lubricity, adhesion, and protein adsorption. The ionic effects demonstrated here greatly broaden our understanding of the use of ions to tune the interfacial properties of charged polymers. It is anticipated that these ionic effects can be further expanded by incorporating new types of important ion-charged polymer interactions and can also be extended to neutral polymer systems.
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Affiliation(s)
- Guangming Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics , University of Science and Technology of China , Hefei , P. R. China 230026
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23
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Zhong J, Luo H, Tang Q, Lei Z, Tong Z. Counterion-Mediated Self-Assembly of Ion-Containing Block Copolymers on the Basis of the Hofmeister Series. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201800554] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jiaxing Zhong
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ATMT); Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Haipeng Luo
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ATMT); Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
- Institute of Smart Fiber Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Qiuju Tang
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ATMT); Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Zhentao Lei
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ATMT); Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
- Institute of Smart Fiber Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Zaizai Tong
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ATMT); Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
- Institute of Smart Fiber Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
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24
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Luo H, Tang Q, Zhong J, Lei Z, Zhou J, Tong Z. Interplay of Solvation and Size Effects Induced by the Counterions in Ionic Block Copolymers on the Basis of Hofmeister Series. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201800508] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Haipeng Luo
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology; Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
- Institute of Smart Fiber Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Qiuju Tang
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology; Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Jiaxing Zhong
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology; Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Zhentao Lei
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology; Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
- Institute of Smart Fiber Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Junyi Zhou
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology; Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
- Institute of Smart Fiber Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
| | - Zaizai Tong
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology; Ministry of Education; Department of Polymer Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
- Institute of Smart Fiber Materials; Zhejiang Sci-Tech University; Hangzhou 310018 China
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25
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Jhiang JS, Wu TH, Chou CJ, Chang Y, Huang CJ. Gel-like ionic complexes for antimicrobial, hemostatic and adhesive properties. J Mater Chem B 2019; 7:2878-2887. [DOI: 10.1039/c8tb03367f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Ion-specific effects offer a great opportunity to construct intelligent macromolecular systems with diverse architectures, on-demand controlled release behaviors and interfacial responsiveness.
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Affiliation(s)
- Jhia-Sin Jhiang
- R&D Center for Membrane Technology
- Chung Yuan Christian University
- Chung-Li City 32023
- Taiwan
- Department of Chemical Engineering
| | - Tzu-Hsien Wu
- Department of Biomedical Sciences and Engineering
- National Central University
- Jhong-Li
- Taiwan
| | - Chung-Jung Chou
- R&D Center for Membrane Technology
- Chung Yuan Christian University
- Chung-Li City 32023
- Taiwan
- Department of Chemical Engineering
| | - Yung Chang
- R&D Center for Membrane Technology
- Chung Yuan Christian University
- Chung-Li City 32023
- Taiwan
- Department of Chemical Engineering
| | - Chun-Jen Huang
- Department of Chemical Engineering
- Chung Yuan Christian University
- Chung-Li City 32023
- Taiwan
- Department of Biomedical Sciences and Engineering
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26
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Silambarasan K, Joseph J. Electrochemical Diagnosis of Chemical Switch: Impact of Structural Changes on Charge Transport Mechanism of “Redox Anion Bound Polysilsesquioxane” Film. ChemElectroChem 2018. [DOI: 10.1002/celc.201800799] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - James Joseph
- Electrodics and Electrocatalysis division; Central Electrochemical Research Institute; Karaikudi India
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27
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Mazzini V, Liu G, Craig VSJ. Probing the Hofmeister series beyond water: Specific-ion effects in non-aqueous solvents. J Chem Phys 2018; 148:222805. [PMID: 29907022 DOI: 10.1063/1.5017278] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
We present an experimental investigation of specific-ion effects in non-aqueous solvents, with the aim of elucidating the role of the solvent in perturbing the fundamental ion-specific trend. The focus is on the anions: CH3COO->F->Cl->Br->I->ClO4->SCN- in the solvents water, methanol, formamide, dimethyl sulfoxide (DMSO), and propylene carbonate (PC). Two types of experiments are presented. The first experiment employs the technique of size exclusion chromatography to evaluate the elution times of electrolytes in the different solvents. We observe that the fundamental (Hofmeister) series is observed in water and methanol, whilst the series is reversed in DMSO and PC. No clear series is observed for formamide. The second experiment uses the quartz crystal microbalance technique to follow the ion-induced swelling and collapse of a polyelectrolyte brush. Here the fundamental series is observed in the protic solvents water, methanol, and formamide, and the series is once again reversed in DMSO and PC. These behaviours are not attributed to the protic/aprotic nature of the solvents, but rather to the polarisability of the solvents and are due to the competition between the interaction of ions with the solvent and the surface. A rule of thumb is proposed for ion specificity in non-aqueous solvents. In weakly polarisable solvents, the trends in specific-ion effects will follow those in water, whereas in strongly polarisable solvents the reverse trend will be observed. Solvents of intermediate polarisability will give weak specific-ion effects.
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Affiliation(s)
- Virginia Mazzini
- Department of Applied Mathematics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
| | - Guangming Liu
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Vincent S J Craig
- Department of Applied Mathematics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia
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28
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Kou R, Zhang J, Chen Z, Liu G. Counterion Specificity of Polyelectrolyte Brushes: Role of Specific Ion-Pairing Interactions. Chemphyschem 2018; 19:1404-1413. [PMID: 29575481 DOI: 10.1002/cphc.201701256] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Indexed: 11/10/2022]
Abstract
We demonstrate here that the properties of poly (2-(methacryloyloxy) ethyl trimethylammonium chloride) brushes can be tuned by counterion species. When the brushes are exposed to external chloride (Cl- ) counterions, obvious dehydration and collapse are only observed at high salt concentrations. In the presence of very strongly chaotropic perchlorate (ClO4- ), the brushes strongly dehydrate and collapse at a very low salt concentration. For the strongly chaotropic thiocyanate ion (SCN- ), the changes in hydration and conformation of the brushes are similar to those observed for ClO4- but at a smaller extent at very low salt concentrations. With the addition of kosmotropic acetate (Ac- ), hydration of the brushes increases, accompanied by a swelling of the brushes in the low-salt-concentration regime. In contrast, the brushes dehydrate and collapse with increasing concentration of Ac- in the high-salt-concentration regime. The counterion specificity of the brushes demonstrated here is determined by specific ion-pairing interactions through modulating the osmotic pressure within the brushes and the hydrophobicity of the ion pairs.
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Affiliation(s)
- Ran Kou
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Jian Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Zhen Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Guangming Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
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29
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Fenoy GE, Giussi JM, von Bilderling C, Maza EM, Pietrasanta LI, Knoll W, Marmisollé WA, Azzaroni O. Reversible modulation of the redox activity in conducting polymer nanofilms induced by hydrophobic collapse of a surface-grafted polyelectrolyte. J Colloid Interface Sci 2018; 518:92-101. [DOI: 10.1016/j.jcis.2018.02.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 01/30/2018] [Accepted: 02/04/2018] [Indexed: 12/30/2022]
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30
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Higaki Y, Inutsuka Y, Ono H, Yamada NL, Ikemoto Y, Takahara A. Counteranion-Specific Hydration States of Cationic Polyelectrolyte Brushes. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00210] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yuji Higaki
- Japan Science
and Technology Agency (JST), ERATO, Takahara Soft Interfaces Project, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | | | | | - Norifumi L. Yamada
- Neutron Science Laboratory, High Energy Accelerator Research Organization, Ibaraki 319-1106, Japan
| | - Yuka Ikemoto
- Japan Synchrotron Radiation
Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho,
Sayo-gun, Hyogo 679-5198, Japan
| | - Atsushi Takahara
- Japan Science
and Technology Agency (JST), ERATO, Takahara Soft Interfaces Project, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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31
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Yang Z, Zhang S, Tarabara VV, Bruening ML. Aqueous Swelling of Zwitterionic Poly(sulfobetaine methacrylate) Brushes in the Presence of Ionic Surfactants. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b01830] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Shouwei Zhang
- Department
of Chemical and Biomolecular Engineering and Department of Chemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | | | - Merlin L. Bruening
- Department
of Chemical and Biomolecular Engineering and Department of Chemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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32
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Yu J, Jackson NE, Xu X, Brettmann BK, Ruths M, de Pablo JJ, Tirrell M. Multivalent ions induce lateral structural inhomogeneities in polyelectrolyte brushes. SCIENCE ADVANCES 2017; 3:eaao1497. [PMID: 29226245 PMCID: PMC5722652 DOI: 10.1126/sciadv.aao1497] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 11/06/2017] [Indexed: 05/22/2023]
Abstract
Subtle details about a polyelectrolyte's surrounding environment can dictate its structural features and potential applications. Atomic force microscopy (AFM), surface forces apparatus (SFA) measurements, and coarse-grained molecular dynamics simulations are combined to study the structure of planar polyelectrolyte brushes [poly(styrenesulfonate), PSS] in a variety of solvent conditions. More specifically, AFM images provide a first direct visualization of lateral inhomogeneities on the surface of polyelectrolyte brushes collapsed in solutions containing trivalent counterions. These images are interpreted in the context of a coarse-grained molecular model and are corroborated by accompanying interaction force measurements with the SFA. Our findings indicate that lateral inhomogeneities are absent from PSS brush layers collapsed in a poor solvent without multivalent ions. Together, AFM, SFA, and our molecular model present a detailed picture in which solvophobic and multivalent ion-induced effects work in concert to drive strong phase separation, with electrostatic bridging of polyelectrolyte chains playing an essential role in the collapsed structure formation.
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Affiliation(s)
- Jing Yu
- Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637, USA
- Institute for Molecular Engineering, Argonne National Laboratory, Lemont, IL 60439, USA
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Nicholas E. Jackson
- Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637, USA
- Institute for Molecular Engineering, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Xin Xu
- Department of Chemistry, University of Massachusetts Lowell, Lowell, MA 01854, USA
| | - Blair K. Brettmann
- Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637, USA
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Marina Ruths
- Department of Chemistry, University of Massachusetts Lowell, Lowell, MA 01854, USA
| | - Juan J. de Pablo
- Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637, USA
- Institute for Molecular Engineering, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Matthew Tirrell
- Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637, USA
- Institute for Molecular Engineering, Argonne National Laboratory, Lemont, IL 60439, USA
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33
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Mining marine shell wastes for polyelectrolyte chitosan anti-biofoulants: Fabrication of high-performance economic and ecofriendly anti-biofouling coatings. Carbohydr Polym 2017; 172:352-364. [DOI: 10.1016/j.carbpol.2017.05.059] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 05/16/2017] [Accepted: 05/18/2017] [Indexed: 12/30/2022]
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34
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Iturri J, Moreno-Cencerrado A, Toca-Herrera JL. Polyelectrolyte brushes as supportive substrate for bacterial S-layer recrystallization: Polymer charge and chain extension factors. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.10.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Wu B, Zhang L, Huang L, Xiao S, Yang Y, Zhong M, Yang J. Salt-Induced Regenerative Surface for Bacteria Killing and Release. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7160-7168. [PMID: 28658955 DOI: 10.1021/acs.langmuir.7b01333] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Antibacterial surfaces with both bacteria killing and release functions show great promise in biological and biomedical applications, in particular for reusable medical devices. However, these surfaces either require a sophisticated technique to create delicate structures or need rigorous stimuli to trigger the functions, greatly limiting their practical application. In this study, we made a step forward by developing a simple system based on a salt-responsive polyzwitterionic brush. Specifically, the salt-responsive brush of poly(3-(dimethyl (4-vinylbenzyl) ammonium) propyl sulfonate) (polyDVBAPS) was endowed with bactericidal function by grafting an effective bactericide, i.e., triclosan (TCS). This simple functionalization successfully integrated the bacteria attach/release function of polyDVBAPS and bactericidal function of TCS. As a result, the surface could kill more than 95% attached bacteria and, subsequently, could rapidly detach ∼97% bacteria after gently shaking in 1.0 M NaCl for 10 min. More importantly, such high killing efficiency and release rate could be well retained (unchanged effectiveness of both killing and release after four severe killing/release cycles), indicating the highly efficient regeneration and long-term reusability of this system. This study not only contributes zwitterionic polymers by conferring new functions but also provides a new, highly efficient and reliable surface for "killing-release" antibacterial strategy.
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Affiliation(s)
- Bozhen Wu
- College of Materials Science & Engineering Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Lixun Zhang
- College of Materials Science & Engineering Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Lei Huang
- College of Materials Science & Engineering Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Shengwei Xiao
- College of Materials Science & Engineering Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Yin Yang
- College of Materials Science & Engineering Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Mingqiang Zhong
- College of Materials Science & Engineering Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Jintao Yang
- College of Materials Science & Engineering Zhejiang University of Technology , Hangzhou 310014, P. R. China
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36
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Chen WL, Menzel M, Watanabe T, Prucker O, Rühe J, Ober CK. Reduced Lateral Confinement and Its Effect on Stability in Patterned Strong Polyelectrolyte Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3296-3303. [PMID: 28266860 DOI: 10.1021/acs.langmuir.7b00165] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The stability of strong polyelectrolyte brushes (PEBs) was studied in bulk and in patterned structures. Thick PEBs of poly([(2-methacryloyloxy)ethyl]trimethylammonium chloride) with thicknesses >100 nm were synthesized using single electron transfer living radical polymerization. Brush patterning was identified using deep-ultraviolet photolithography by means of either a top-down (TD) or bottom-up (BU) method, with features as small as 200 nm. The brushes were soaked in water under a range of pH or temperature conditions, and the hydrolysis was monitored through dry-state ellipsometry and atomic force microscopy measurements. BU patterns showed reduced degrafting for smaller patterns, which was attributed to increased stress relaxation at such dimensions. In contrast to the already relaxed BU-patterned brush, a TD-patterned brush possesses perpendicular structures that result from the use of orthogonal lithography. It was found that the TD process induces cross-linking on the sidewall, which subsequently fortifies the sidewall materials. This modification of the polymer brushes hindered the stress relaxation of the patterns, and the degrafting trends became irrelevant to the pattern sizes. With proper tuning, the cross-linking on the sidewall was minimized and the degrafting trends were again relaxation-dependent.
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Affiliation(s)
| | - Matthias Menzel
- Department of Microsystems Engineering (IMTEK), University of Freiburg , 79110 Freiburg, Germany
| | - Tsukasa Watanabe
- Department of Applied Chemistry, Tokyo Metropolitan University , Hachioji 192-0397, Tokyo, Japan
| | - Oswald Prucker
- Department of Microsystems Engineering (IMTEK), University of Freiburg , 79110 Freiburg, Germany
| | - Jürgen Rühe
- Department of Microsystems Engineering (IMTEK), University of Freiburg , 79110 Freiburg, Germany
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37
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Dehghani ES, Naik VV, Mandal J, Spencer ND, Benetti EM. Physical Networks of Metal-Ion-Containing Polymer Brushes Show Fully Tunable Swelling, Nanomechanical and Nanotribological Properties. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02673] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ella S. Dehghani
- Laboratory for Surface Science
and Technology, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
| | - Vikrant V. Naik
- Laboratory for Surface Science
and Technology, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
| | - Joydeb Mandal
- Laboratory for Surface Science
and Technology, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
| | - Nicholas D. Spencer
- Laboratory for Surface Science
and Technology, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
| | - Edmondo M. Benetti
- Laboratory for Surface Science
and Technology, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg
5, CH-8093 Zurich, Switzerland
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38
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Murdoch TJ, Humphreys BA, Willott JD, Prescott SW, Nelson A, Webber GB, Wanless EJ. Enhanced specific ion effects in ethylene glycol-based thermoresponsive polymer brushes. J Colloid Interface Sci 2017; 490:869-878. [DOI: 10.1016/j.jcis.2016.11.044] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/14/2016] [Accepted: 11/14/2016] [Indexed: 12/26/2022]
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39
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Joh DY, McGuire F, Abedini-Nassab R, Andrews JB, Achar RK, Zimmers Z, Mozhdehi D, Blair R, Albarghouthi F, Oles W, Richter J, Fontes CM, Hucknall AM, Yellen BB, Franklin AD, Chilkoti A. Poly(oligo(ethylene glycol) methyl ether methacrylate) Brushes on High-κ Metal Oxide Dielectric Surfaces for Bioelectrical Environments. ACS APPLIED MATERIALS & INTERFACES 2017; 9:5522-5529. [PMID: 28117566 DOI: 10.1021/acsami.6b15836] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Advances in electronics and life sciences have generated interest in "lab-on-a-chip" systems utilizing complementary metal oxide semiconductor (CMOS) circuitry for low-power, portable, and cost-effective biosensing platforms. Here, we present a simple and reliable approach for coating "high-κ" metal oxide dielectric materials with "non-fouling" (protein- and cell-resistant) poly(oligo(ethylene glycol) methyl ether methacrylate (POEGMA) polymer brushes as biointerfacial coatings to improve their relevance for biosensing applications utilizing advanced electronic components. By using a surface-initiated "grafting from" strategy, POEGMA films were reliably grown on each material, as confirmed by ellipsometric measurements and X-ray photoelectron spectroscopy (XPS) analysis. The electrical behavior of these POEGMA films was also studied to determine the potential impact on surrounding electronic devices, yielding information on relative permittivity and breakdown field for POEGMA in both dry and hydrated states. We show that the incorporation of POEGMA coatings significantly reduced levels of nonspecific protein adsorption compared to uncoated high-κ dielectric oxide surfaces as shown by protein resistance assays. These attributes, combined with the robust dielectric properties of POEGMA brushes on high-κ surfaces open the way to incorporate this protein and cell resistant polymer interface into CMOS devices for biomolecular detection in a complex liquid milieu.
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Affiliation(s)
- Daniel Y Joh
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Felicia McGuire
- Department of Electrical and Computer Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Roozbeh Abedini-Nassab
- Department of Mechanical Engineering and Materials Science, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Joseph B Andrews
- Department of Electrical and Computer Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Rohan K Achar
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Zackary Zimmers
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Darush Mozhdehi
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Rebecca Blair
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Faris Albarghouthi
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - William Oles
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Jacob Richter
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Cassio M Fontes
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Angus M Hucknall
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Benjamin B Yellen
- Department of Mechanical Engineering and Materials Science, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
| | - Aaron D Franklin
- Department of Electrical and Computer Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University , Durham, North Carolina 27708, United States
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40
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Zoppe JO, Ataman NC, Mocny P, Wang J, Moraes J, Klok HA. Surface-Initiated Controlled Radical Polymerization: State-of-the-Art, Opportunities, and Challenges in Surface and Interface Engineering with Polymer Brushes. Chem Rev 2017; 117:1105-1318. [PMID: 28135076 DOI: 10.1021/acs.chemrev.6b00314] [Citation(s) in RCA: 578] [Impact Index Per Article: 82.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The generation of polymer brushes by surface-initiated controlled radical polymerization (SI-CRP) techniques has become a powerful approach to tailor the chemical and physical properties of interfaces and has given rise to great advances in surface and interface engineering. Polymer brushes are defined as thin polymer films in which the individual polymer chains are tethered by one chain end to a solid interface. Significant advances have been made over the past years in the field of polymer brushes. This includes novel developments in SI-CRP, as well as the emergence of novel applications such as catalysis, electronics, nanomaterial synthesis and biosensing. Additionally, polymer brushes prepared via SI-CRP have been utilized to modify the surface of novel substrates such as natural fibers, polymer nanofibers, mesoporous materials, graphene, viruses and protein nanoparticles. The last years have also seen exciting advances in the chemical and physical characterization of polymer brushes, as well as an ever increasing set of computational and simulation tools that allow understanding and predictions of these surface-grafted polymer architectures. The aim of this contribution is to provide a comprehensive review that critically assesses recent advances in the field and highlights the opportunities and challenges for future work.
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Affiliation(s)
- Justin O Zoppe
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
| | - Nariye Cavusoglu Ataman
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
| | - Piotr Mocny
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
| | - Jian Wang
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
| | - John Moraes
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
| | - Harm-Anton Klok
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 12 CH-1015 Lausanne, Switzerland
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41
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Liu Z, He Z, Lv J, Jin Y, Wu S, Liu G, Zhou F, Wang J. Ion-specific ice propagation behavior on polyelectrolyte brush surfaces. RSC Adv 2017. [DOI: 10.1039/c6ra24847k] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Various hydration states of PB lead to a difference of ice propagation rate up to five orders of magnitude.
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Affiliation(s)
- Zhenqi Liu
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
| | - Zhiyuan He
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
| | - Jianyong Lv
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
| | - Yuankai Jin
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
| | - Shuwang Wu
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
| | - Guangming Liu
- Department of Chemical Physics
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei
- PR China
| | - Feng Zhou
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou
- PR China
| | - Jianjun Wang
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
- PR China
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42
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Willott JD, Murdoch TJ, Webber GB, Wanless EJ. Physicochemical behaviour of cationic polyelectrolyte brushes. Prog Polym Sci 2017. [DOI: 10.1016/j.progpolymsci.2016.09.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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43
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Dong YS, Xiong XH, Lu XW, Wu ZQ, Chen H. Antibacterial surfaces based on poly(cationic liquid) brushes: switchability between killing and releasing via anion counterion switching. J Mater Chem B 2016; 4:6111-6116. [PMID: 32263499 DOI: 10.1039/c6tb01464j] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The development of a smart antibacterial surface that can both kill attached live bacteria and release dead bacteria is reported. The surface consists of counterion-responsive poly(cationic liquid) brushes of poly(1-(2-methacryloyloxyhexyl)-3-methylimidazolium bromide) (PIL(Br)), the properties of which can be switched repeatedly between bacterial killing and bacterial release. Upon counter-anion exchange of PIL(Br) chains using lithium bis(trifluoromethanesulfonyl) amide (LiTf2N) to yield PIL(Tf2N), the wettability of the surface changes from hydrophilic (water contact angle ∼52°) to hydrophobic (∼97°). The PIL(Br) chains adopt an extended conformation with bactericidal properties. Counter-anion switching to PIL(Tf2N) gives a collapsed chain conformation allowing the release of killed bacteria. The switchable killing and releasing actions of the surface were maintained over three cycles. Thus it is concluded that PIL(Br) layers provide a viable approach for the fabrication of "smart" antibacterial surfaces.
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Affiliation(s)
- Yi-Shi Dong
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-ai Road, Suzhou 215123, P. R. China.
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44
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Zakrisson J, Singh B, Svenmarker P, Wiklund K, Zhang H, Hakobyan S, Ramstedt M, Andersson M. Detecting Bacterial Surface Organelles on Single Cells Using Optical Tweezers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4521-9. [PMID: 27088225 DOI: 10.1021/acs.langmuir.5b03845] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Bacterial cells display a diverse array of surface organelles that are important for a range of processes such as intercellular communication, motility and adhesion leading to biofilm formation, infections, and bacterial spread. More specifically, attachment to host cells by Gram-negative bacteria are mediated by adhesion pili, which are nanometers wide and micrometers long fibrous organelles. Since these pili are significantly thinner than the wavelength of visible light, they cannot be detected using standard light microscopy techniques. At present, there is no fast and simple method available to investigate if a single cell expresses pili while keeping the cell alive for further studies. In this study, we present a method to determine the presence of pili on a single bacterium. The protocol involves imaging the bacterium to measure its size, followed by predicting the fluid drag based on its size using an analytical model, and thereafter oscillating the sample while a single bacterium is trapped by an optical tweezer to measure its effective fluid drag. Comparison between the predicted and the measured fluid drag thereby indicate the presence of pili. Herein, we verify the method using polymer coated silica microspheres and Escherichia coli bacteria expressing adhesion pili. Our protocol can in real time and within seconds assist single cell studies by distinguishing between piliated and nonpiliated bacteria.
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Affiliation(s)
- Johan Zakrisson
- Department of Physics, and ‡Department of Chemistry, Umeå University , 901 87 Umeå, Sweden
| | - Bhupender Singh
- Department of Physics, and ‡Department of Chemistry, Umeå University , 901 87 Umeå, Sweden
| | - Pontus Svenmarker
- Department of Physics, and ‡Department of Chemistry, Umeå University , 901 87 Umeå, Sweden
| | - Krister Wiklund
- Department of Physics, and ‡Department of Chemistry, Umeå University , 901 87 Umeå, Sweden
| | - Hanqing Zhang
- Department of Physics, and ‡Department of Chemistry, Umeå University , 901 87 Umeå, Sweden
| | - Shoghik Hakobyan
- Department of Physics, and ‡Department of Chemistry, Umeå University , 901 87 Umeå, Sweden
| | - Madeleine Ramstedt
- Department of Physics, and ‡Department of Chemistry, Umeå University , 901 87 Umeå, Sweden
| | - Magnus Andersson
- Department of Physics, and ‡Department of Chemistry, Umeå University , 901 87 Umeå, Sweden
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45
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Elshaarawy RFM, Refaee AA, El-Sawi EA. Pharmacological performance of novel poly-(ionic liquid)-grafted chitosan-N-salicylidene Schiff bases and their complexes. Carbohydr Polym 2016; 146:376-87. [PMID: 27112887 DOI: 10.1016/j.carbpol.2016.03.017] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/03/2016] [Accepted: 03/05/2016] [Indexed: 01/05/2023]
Abstract
In our endeavor to develop a new class of pharmacological candidates with antimicrobial and anticancer efficacy, a series of biopolymeric chitosan Schiff bases bearing salicylidene ionic liquid (IL-Sal) brushes (ILCSB1-3, poly-(GlcNHAc-GlcNH2-(GlcN-Sal-IL)) was successfully synthesized by adopting efficient synthetic routes. Unfortunately, metalation trials of these biopolymeric Schiff bases afford the corresponding Ag(I)/M(II) complexes (where M=Co, Pd). These designed architectures were structurally characterized and pharmacologically evaluated for their in vitro antimicrobial, against common bacterial and fungal pathogens, and anticancer activities against human colon carcinoma (HCT-116) cell line. In conclusion functionalization of chitosan with IL-Sal brushes coupled with metalation of formed ILCSBs were synergistically enhanced its antimicrobial and antitumor properties to a great extent. Noteworthy, Ag-ILCSB2 (IC50=9.13μg/mL) was ca. 5-fold more cytotoxic against HCT-116 cell line than ILCSB2 (IC50=43.30μg/mL).
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Affiliation(s)
- Reda F M Elshaarawy
- Chemistry Department, Faculty of Science, Suez University, Suez, Egypt; Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine Universität Düsseldorf, Germany.
| | - Ayaat A Refaee
- Faculty of Women for Arts, Science and Education, Ain Shams University, Heliopolis, Cairo, Egypt.
| | - Emtithal A El-Sawi
- Faculty of Women for Arts, Science and Education, Ain Shams University, Heliopolis, Cairo, Egypt.
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46
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Politakos N, Azinas S, Moya SE. Responsive Copolymer Brushes of Poly[(2-(Methacryloyloxy)Ethyl) Trimethylammonium Chloride] (PMETAC) and Poly(1H,1H,2H,2H-Perfluorodecyl acrylate) (PPFDA) to Modulate Surface Wetting Properties. Macromol Rapid Commun 2016; 37:662-7. [DOI: 10.1002/marc.201500630] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 12/19/2015] [Indexed: 01/12/2023]
Affiliation(s)
- Nikolaos Politakos
- Soft Matter Nanotechnology; CIC biomaGUNE; Paseo Miramón 182 C 20009 Donostia-San Sebastian Spain
| | - Stavros Azinas
- Biosurfaces; CIC biomaGUNE; Paseo Miramón 182 C 20009 Donostia-San Sebastian Spain
- Structural Biology Unit; CIC bioGUNE; CIBERehd; Derio Spain
| | - Sergio Enrique Moya
- Soft Matter Nanotechnology; CIC biomaGUNE; Paseo Miramón 182 C 20009 Donostia-San Sebastian Spain
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47
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Irigoyen J, Laakso T, Politakos N, Dahne L, Pihlajamäki A, Mänttäri M, Moya SE. Design and Performance Evaluation of Hybrid Nanofiltration Membranes Based on Multiwalled Carbon Nanotubes and Polyelectrolyte Multilayers for Larger Ion Rejection and Separation. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201500433] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Joseba Irigoyen
- Soft Matter Nanotechnology Group; CIC biomaGUNE; Paseo Miramón 182 C 20009 San Sebastián Gipuzkoa Spain
| | - Timo Laakso
- Lappeenranta University of Technology; Skinnarilankatu 34 53850 Lappeenranta Finland
| | - Nikolaos Politakos
- Soft Matter Nanotechnology Group; CIC biomaGUNE; Paseo Miramón 182 C 20009 San Sebastián Gipuzkoa Spain
| | - Lars Dahne
- Surflay Nanotech GmbH; Max-Planck-Straße 3 12489 Berlin Germany
| | - Artho Pihlajamäki
- Lappeenranta University of Technology; Skinnarilankatu 34 53850 Lappeenranta Finland
| | - Mika Mänttäri
- Lappeenranta University of Technology; Skinnarilankatu 34 53850 Lappeenranta Finland
| | - Sergio Enrique Moya
- Soft Matter Nanotechnology Group; CIC biomaGUNE; Paseo Miramón 182 C 20009 San Sebastián Gipuzkoa Spain
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48
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Elshaarawy RFM, Mustafa FHA, Herbst A, Farag AEM, Janiak C. Surface functionalization of chitosan isolated from shrimp shells, using salicylaldehyde ionic liquids in exploration for novel economic and ecofriendly antibiofoulants. RSC Adv 2016. [DOI: 10.1039/c5ra27489c] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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49
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Guan X, Zhang D, Jia T, Zhang Y, Meng L, Jin Q, Ma H, Lu D, Lai S, Lei Z. Intriguingly tuning the fluorescence of AIEgen using responsive polyelectrolyte microspheres. RSC Adv 2016. [DOI: 10.1039/c6ra23380e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We successfully synthesized counterion-sensitive TPE–METAC polyelectrolyte microspheres and tuned its fluorescence and size by ClO4−, PF6− and TFSI−.
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50
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Das S, Banik M, Chen G, Sinha S, Mukherjee R. Polyelectrolyte brushes: theory, modelling, synthesis and applications. SOFT MATTER 2015; 11:8550-83. [PMID: 26399305 DOI: 10.1039/c5sm01962a] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Polyelectrolyte (PE) brushes are a special class of polymer brushes (PBs) containing charges. Polymer chains attain "brush"-like configuration when they are grafted or get localized at an interface (solid-fluid or liquid-fluid) with sufficiently close proximity between two-adjacent grafted polymer chains - such a proximity triggers a particular nature of interaction between the adjacent polymer molecules forcing them to stretch orthogonally to the grafting interface, instead of random-coil arrangement. In this review, we discuss the theory, synthesis, and applications of PE brushes. The theoretical discussion starts with the standard scaling concepts for polymer and PE brushes; following that, we shed light on the state of the art in continuum modelling approaches for polymer and PE brushes directed towards analysis beyond the scaling calculations. A special emphasis is laid in pinpointing the cases for which the PE electrostatic effects can be de-coupled from the PE entropic and excluded volume effects; such de-coupling is necessary to appropriately probe the complicated electrostatic effects arising from pH-dependent charging of the PE brushes and the use of these effects for driving liquid and ion transport at the interfaces covered with PE brushes. We also discuss the atomistic simulation approaches for polymer and PE brushes. Next we provide a detailed review of the existing approaches for the synthesis of polymer and PE brushes on interfaces, nanoparticles, and nanochannels, including mixed brushes and patterned brushes. Finally, we discuss some of the possible applications and future developments of polymer and PE brushes grafted on a variety of interfaces.
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Affiliation(s)
- Siddhartha Das
- Department of Mechanical Engineering, University of Maryland, College Park, MD-20742, USA.
| | - Meneka Banik
- Instability and Soft Patterning Laboratory, Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Pin - 721302, Kharagpur, West Bengal, India
| | - Guang Chen
- Department of Mechanical Engineering, University of Maryland, College Park, MD-20742, USA.
| | - Shayandev Sinha
- Department of Mechanical Engineering, University of Maryland, College Park, MD-20742, USA.
| | - Rabibrata Mukherjee
- Instability and Soft Patterning Laboratory, Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Pin - 721302, Kharagpur, West Bengal, India
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