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Hegaard F, Biro R, Ehtiati K, Thormann E. Ion-Specific Antipolyelectrolyte Effect on the Swelling Behavior of Polyzwitterionic Layers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1456-1464. [PMID: 36656651 DOI: 10.1021/acs.langmuir.2c02798] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
In this study, we systematically investigate the interactions between mobile ions generated from added salts and immobile charges within a sulfobetaine-based polyzwitterionic film in the presence of five salts (KCl, KBr, KSCN, LiCl, and CsCl). The sulfobetaine groups contain quaternary alkylammonium and sulfonate groups, giving the positive and negative charges. The swelling of the zwitterionic film in the presence of different salts is compared with the swelling behavior of a polycationic or polyanionic film containing the same charged groups. For such a comparative study, we design cross-linked terpolymer films with similar thicknesses, cross-link densities, and charge fractions, but with varying charged moieties. While the addition of salt in general leads to a collapse of both cationic and anionic films, the presence of specific types of mobile anions (Cl-, Br-, and SCN-) considerably influences the swelling behavior of polycationic films. We attribute this observation to a different degree of ion-pair formations between the different types of anionic counterions and the immobile cationic quaternary alkylammonium groups in the films where highly polarizable counterions such as SCN- lead to a high degree of ion pairing and less polarizable counterions, such as Cl-, cause a low degree of ion pairing. Conversely, we do not observe any substantial effect of varying the type of cationic counterions (K+, Li+, and Cs+), which we assign to the lack of ion pairing between the weakly polarizable cations and the immobile anionic sulfonate groups in the films. In addition, we observe that the zwitterionic films swell with increasing ionic strength and the degree of swelling is anion dependent, which is in agreement with previous reports on the "antipolyelectrolyte effect". Herein, we explain this ion-specific swelling behavior with the different cation and anion abilities to form ion pairs with quaternary alkylammonium and sulfonate in the sulfobetaine groups.
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Affiliation(s)
- Frederik Hegaard
- Department of Chemistry, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Robert Biro
- Department of Chemistry, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Koosha Ehtiati
- Department of Chemistry, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Esben Thormann
- Department of Chemistry, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
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Douarche C, Cortès R, Roser SJ, Sikorav JL, Braslau A. DNA Adsorption at Liquid/Solid Interfaces. J Phys Chem B 2008; 112:13676-9. [DOI: 10.1021/jp807759d] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Carine Douarche
- Physique de la Matière Condensée École Polytechnique, CNRS, 91128 Palaiseau, France, Institut de Recherche Interdisciplinaire, Cité Scientifique, Avenue Poincaré BP 60069, 59652 Villeneuve d’Ascq Cedex, France, Department of Chemistry, University of Bath, Bath, Avon, U.K. BA2 7AY, Service de Biologie Intégrative et de Génétique Moléculaire, Institut de Physique Théorique, CNRS URA 2306, and Service de Physique de l′État Condensé, CNRS URA 2464, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Robert Cortès
- Physique de la Matière Condensée École Polytechnique, CNRS, 91128 Palaiseau, France, Institut de Recherche Interdisciplinaire, Cité Scientifique, Avenue Poincaré BP 60069, 59652 Villeneuve d’Ascq Cedex, France, Department of Chemistry, University of Bath, Bath, Avon, U.K. BA2 7AY, Service de Biologie Intégrative et de Génétique Moléculaire, Institut de Physique Théorique, CNRS URA 2306, and Service de Physique de l′État Condensé, CNRS URA 2464, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Steven J. Roser
- Physique de la Matière Condensée École Polytechnique, CNRS, 91128 Palaiseau, France, Institut de Recherche Interdisciplinaire, Cité Scientifique, Avenue Poincaré BP 60069, 59652 Villeneuve d’Ascq Cedex, France, Department of Chemistry, University of Bath, Bath, Avon, U.K. BA2 7AY, Service de Biologie Intégrative et de Génétique Moléculaire, Institut de Physique Théorique, CNRS URA 2306, and Service de Physique de l′État Condensé, CNRS URA 2464, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Jean-Louis Sikorav
- Physique de la Matière Condensée École Polytechnique, CNRS, 91128 Palaiseau, France, Institut de Recherche Interdisciplinaire, Cité Scientifique, Avenue Poincaré BP 60069, 59652 Villeneuve d’Ascq Cedex, France, Department of Chemistry, University of Bath, Bath, Avon, U.K. BA2 7AY, Service de Biologie Intégrative et de Génétique Moléculaire, Institut de Physique Théorique, CNRS URA 2306, and Service de Physique de l′État Condensé, CNRS URA 2464, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Alan Braslau
- Physique de la Matière Condensée École Polytechnique, CNRS, 91128 Palaiseau, France, Institut de Recherche Interdisciplinaire, Cité Scientifique, Avenue Poincaré BP 60069, 59652 Villeneuve d’Ascq Cedex, France, Department of Chemistry, University of Bath, Bath, Avon, U.K. BA2 7AY, Service de Biologie Intégrative et de Génétique Moléculaire, Institut de Physique Théorique, CNRS URA 2306, and Service de Physique de l′État Condensé, CNRS URA 2464, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France
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Kuhn PS, Levin Y, Barbosa MC, Ravazzolo AP. Amphiphile Adsorption on Rigid Polyelectrolytes. Macromolecules 2007. [DOI: 10.1021/ma071311y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paulo S. Kuhn
- Departamento de Física, Instituto de Física e Matemática, Universidade Federal de Pelotas, Caixa Postal 354, 96010-900, Pelotas, RS, Brazil
| | - Yan Levin
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970, Porto Alegre, RS, Brazil
| | - Marcia C. Barbosa
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970, Porto Alegre, RS, Brazil
| | - Ana Paula Ravazzolo
- Departamento de Patologia Clínica Veterinária, Instituto de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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Su CJ, Liu YC, Chen HL, Li YC, Lin HK, Liu WL, Hsu CS. Two-dimensional densely packed DNA nanostructure derived from DNA complexation with a low-generation poly(amidoamine) dendrimer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:975-8. [PMID: 17240998 DOI: 10.1021/la0624642] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
One of the keys for using deoxyribonucleic acid (DNA) as a nanomaterial relies on how the individual DNA chain can be aligned and how a multitude of DNA chains can be packed into ordered nanostructures. Here we present a simple method for constructing a 2-D densely packed DNA nanostructure using the electrostatic complex of DNA with a poly(amidoamine) (PAMAM) dendrimer of generation two. Ordered DNA arrays are formed by drop-casting an aqueous solution containing positively overcharged complexes onto mica followed by a prolonged incubation. During the incubation, the complexes tend to adsorb onto the negatively charged mica surface through electrostatic attraction. The rodlike complexes organize to form ordered arrays to increase the surface density of the adsorbed complexes and hence the attractive free energy of adsorption. The densely packed nanostructure obtained here is distinguished from the previously reported spheroid or toroid structure derived from DNA complexations with the higher-generation dendrimers.
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Affiliation(s)
- Chun-Jen Su
- Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 30013, Taiwan
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Biesheuvel PM, van der Veen M, Norde W. A Modified Poisson−Boltzmann Model Including Charge Regulation for the Adsorption of Ionizable Polyelectrolytes to Charged Interfaces, Applied to Lysozyme Adsorption on Silica. J Phys Chem B 2005; 109:4172-80. [PMID: 16851479 DOI: 10.1021/jp0463823] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The equilibrium adsorption of polyelectrolytes with multiple types of ionizable groups is described using a modified Poisson-Boltzmann equation including charge regulation of both the polymer and the interface. A one-dimensional mean-field model is used in which the electrostatic potential is assumed constant in the lateral direction parallel to the surface. The electrostatic potential and ionization degrees of the different ionizable groups are calculated as function of the distance from the surface after which the electric and chemical contributions to the free energy are obtained. The various interactions between small ions, surface and polyelectrolyte are self-consistently considered in the model, such as the increase in charge of polyelectrolyte and surface upon adsorption as well as the displacement of small ions and the decrease of permittivity. These interactions may lead to complex dependencies of the adsorbed amount of polyelectrolyte on pH, ionic strength, and properties of the polymer (volume, permittivity, number, and type of ionizable groups) and of the surface (number of ionizable groups, pK, Stern capacity). For the adsorption of lysozyme on silica, the model qualitatively describes the gradual increase of adsorbed amount with pH up to a maximum value at pHc, which is below the iso-electric point, as well as the sharp decrease of adsorbed amount beyond pHc. With increasing ionic strength the adsorbed amount decreases (for pH > pHc), and pHc shifts to lower values.
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Affiliation(s)
- P Maarten Biesheuvel
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands
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