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Ahmad M, Ahmed M. Characterization and applications of ion-exchange membranes and selective ion transport through them: a review. J APPL ELECTROCHEM 2023. [DOI: 10.1007/s10800-023-01882-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
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2
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Lux C, Tilger T, Geisler R, Soltwedel O, von Klitzing R. Model Surfaces for Paper Fibers Prepared from Carboxymethyl Cellulose and Polycations. Polymers (Basel) 2021; 13:435. [PMID: 33573003 PMCID: PMC7866410 DOI: 10.3390/polym13030435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 01/22/2021] [Accepted: 01/23/2021] [Indexed: 11/16/2022] Open
Abstract
For tailored functionalization of cellulose based papers, the interaction between paper fibers and functional additives must be understood. Planar cellulose surfaces represent a suitable model system for studying the binding of additives. In this work, polyelectrolyte multilayers (PEMs) are prepared by alternating dip-coating of the negatively charged cellulose derivate carboxymethyl cellulose and a polycation, either polydiallyldimethylammonium chloride (PDADMAC) or chitosan (CHI). The parameters varied during PEM formation are the concentrations (0.1-5 g/L) and pH (pH = 2-6) of the dipping solutions. Both PEM systems grow exponentially, revealing a high mobility of the polyelectrolytes (PEs). The pH-tunable charge density leads to PEMs with different surface topographies. Quartz crystal microbalance experiments with dissipation monitoring (QCM-D) reveal the pronounced viscoelastic properties of the PEMs. Ellipsometry and atomic force microscopy (AFM) measurements show that the strong and highly charged polycation PDADMAC leads to the formation of smooth PEMs. The weak polycation CHI forms cellulose model surfaces with higher film thicknesses and a tunable roughness. Both PEM systems exhibit a high water uptake when exposed to a humid environment, with the PDADMAC/carboxymethyl cellulose (CMC) PEMs resulting in a water uptake up to 60% and CHI/CMC up to 20%. The resulting PEMs are water-stable, but water swellable model surfaces with a controllable roughness and topography.
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Affiliation(s)
| | | | | | | | - Regine von Klitzing
- Soft Matter at Interfaces, Department of Physics, Technical University of Darmstadt, Hochschulstraße 8, 64289 Darmstadt, Germany; (C.L.); (T.T.); (R.G.); (O.S.)
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3
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Guzmán E, Rubio RG, Ortega F. A closer physico-chemical look to the Layer-by-Layer electrostatic self-assembly of polyelectrolyte multilayers. Adv Colloid Interface Sci 2020; 282:102197. [PMID: 32579951 DOI: 10.1016/j.cis.2020.102197] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/06/2020] [Accepted: 06/08/2020] [Indexed: 01/08/2023]
Abstract
The fabrication of polyelectrolyte multilayer films (PEMs) using the Layer-by-Layer (LbL) method is one of the most versatile approaches for manufacturing functional surfaces. This is the result of the possibility to control the assembly process of the LbL films almost at will, by changing the nature of the assembled materials (building blocks), the assembly conditions (pH, ionic strength, temperature, etc.) or even by changing some other operational parameters which may impact in the structure and physico-chemical properties of the obtained multi-layered films. Therefore, the understanding of the impact of the above mentioned parameters on the assembly process of LbL materials plays a critical role in the potential use of the LbL method for the fabrication of new functional materials with technological interest. This review tries to provide a broad physico-chemical perspective to the study of the fabrication process of PEMs by the LbL method, which allows one to take advantage of the many possibilities offered for this approach on the fabrication of new functional nanomaterials.
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Sánchez PA, Vögele M, Smiatek J, Qiao B, Sega M, Holm C. Atomistic simulation of PDADMAC/PSS oligoelectrolyte multilayers: overall comparison of tri- and tetra-layer systems. SOFT MATTER 2019; 15:9437-9451. [PMID: 31720676 DOI: 10.1039/c9sm02010a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
By employing large-scale molecular dynamics simulations of atomistically resolved oligoelectrolytes in aqueous solutions, we study in detail the first four layer-by-layer deposition cycles of an oligoelectrolyte multilayer made of poly(diallyl dimethyl ammonium chloride)/poly(styrene sulfonate sodium salt) (PDADMAC/PSS). The multilayers are grown on a silica substrate in 0.1 M NaCl electrolyte solutions and the swollen structures are then subsequently exposed to varying added salt concentration. We investigated the microscopic properties of the films, analyzing in detail the differences between three- and four-layer systems. Our simulations provide insights into the early stages of growth of a multilayer, which are particularly challenging for experimental observations. We found rather strong complexation of the oligoelectrolytes, with fuzzy layering of the film structure. The main charge compensation mechanism is for all cases intrinsic, whereas extrinsic compensation is relatively enhanced for the layer of the last deposition cycle. In addition, we quantified other fundamental observables of these systems, such as the film thickness, water uptake, and overcharge fractions for each deposition layer.
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Affiliation(s)
- Pedro A Sánchez
- Ural Federal University, 51 Lenin av., Ekaterinburg, 620000, Russian Federation. and Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, Germany
| | - Martin Vögele
- Department of Computer Science, Stanford University, Stanford, California, USA
| | - Jens Smiatek
- Institut für Computerphysik, Universität Stuttgart, 70569 Stuttgart, Germany
| | - Baofu Qiao
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois, USA
| | - Marcello Sega
- Forschungszentrum Jülich, Helmholtz Institute Erlangen-Nuremberg, Nuremberg, Germany
| | - Christian Holm
- Institut für Computerphysik, Universität Stuttgart, 70569 Stuttgart, Germany
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Huang J, Zajforoushan Moghaddam S, Thormann E. Structural Investigation of a Self-Cross-Linked Chitosan/Alginate Dialdehyde Multilayered Film with in Situ QCM-D and Spectroscopic Ellipsometry. ACS OMEGA 2019; 4:2019-2029. [PMID: 31459453 PMCID: PMC6648685 DOI: 10.1021/acsomega.8b03145] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 01/10/2019] [Indexed: 05/30/2023]
Abstract
A chitosan/alginate dialdehyde multilayered film was fabricated using the layer-by-layer assembly method. Besides electrostatic interaction that promotes alternate adsorption of the oppositely charged polyelectrolytes, the Schiff base reaction between the amine groups on chitosan and the aldehyde groups on alginate dialdehyde provides a covalently cross-linked film, which after reduction by sodium cyanoborohydride is stable under both acidic and alkaline conditions. Moreover, the cross-linked film is responsive to changes in pH and addition of multivalent salts. The structural properties of the multilayered film such as thickness, refractive index, and water content were examined using simultaneous quartz crystal microbalance with dissipation monitoring and spectroscopic ellipsometry.
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Affiliation(s)
- Junhao Huang
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
| | | | - Esben Thormann
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
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6
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Ghavidel N, Fatehi P. Synergistic effect of lignin incorporation into polystyrene for producing sustainable superadsorbent. RSC Adv 2019; 9:17639-17652. [PMID: 35520539 PMCID: PMC9064571 DOI: 10.1039/c9ra02526j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 05/22/2019] [Indexed: 12/15/2022] Open
Abstract
Lignin has gained intensive interest as an excellent raw material for the generation of advanced green products. Polystyrene (PS) is known for its worldwide application in water purification processes. To induce a sustainable PS, kraft lignin (KL) and polystyrene were polymerized via free radical polymerization in a facile aqueous emulsion process. KL enhanced surface area and porosity of PS. The physicochemical properties of induced KL–PS were analyzed, and the fate of lignin in KL–PS was discussed fundamentally. Wettability and surface energy analyses were implemented to monitor the surface properties of KL, PS and KL–PS. Incorporation of KL in PS (40 wt%) boosted its surface energy and oxygen content, which led to KL–PS with better compatibility than PS with copper ions in aqueous systems. A quartz crystal microbalance with dissipation (QCM-D) confirmed the noticeably higher adsorption performance of copper ion on KL–PS than on PS and KL. The sorption mechanism, which was revealed by FTIR studies, was primarily attributed to the coordination of Cu(ii) and hydroxyl group of KL–PS as well as the quadrupolar system of KL–PS. Lignin has gained intensive interest as an excellent raw material for the generation of advanced green products.![]()
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Affiliation(s)
- Nasim Ghavidel
- Green Processes Research Centre and Chemical Engineering Department
- Lakehead University
- Thunder Bay
- Canada
| | - Pedram Fatehi
- Green Processes Research Centre and Chemical Engineering Department
- Lakehead University
- Thunder Bay
- Canada
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7
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Keisar O, Cohen Y, Finkelstein Y, Kostirya N, Ben-David R, Danon A, Porat Z, Almog J. Measuring the water content in freshly-deposited fingermarks. Forensic Sci Int 2018; 294:204-210. [PMID: 30537647 DOI: 10.1016/j.forsciint.2018.11.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 11/03/2018] [Accepted: 11/16/2018] [Indexed: 11/30/2022]
Abstract
The literature view regarding the composition of deposited fingermarks has long been that the average water content is in the range of 98-99wt.%. This value has recently been challenged by Kent, claiming that it should be 20wt.% at most. Herein we have measured the weight percentage of water content in freshly-deposited fingermarks, with and without hand pre-washing. Two complementary techniques were utilized for the measurements, namely quartz crystal microbalance (QCM) for determining the relative mass-loss and its rate at ca. 37°C, and temperature-programmed desorption-mass spectrometry (TPD-MS) for establishing that the mass loss arises solely from the complete evaporation of all the water content in the fingermarks (done with hand pre-washing only). Unlike the traditional narrow-range values of 98-99% and the limiting value of 20wt.% suggested by Kent, our measurements indicate the occurrence of a broad 20-70% water content. Higher contents of water in fingermarks were found post hand pre-washing, most probably due to removal of the sebum from the fingertips, but none of the results exceeded 90%.
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Affiliation(s)
- Or Keisar
- Israel Atomic Energy Commission (IAEC), Israel
| | - Yair Cohen
- Department of Chemistry, Nuclear Research Center-Negev, P.O.Box 9001, Be'er Sheva 84190, Israel.
| | - Yacov Finkelstein
- Department of Chemistry, Nuclear Research Center-Negev, P.O.Box 9001, Be'er Sheva 84190, Israel
| | - Natalie Kostirya
- Department of Chemistry, Nuclear Research Center-Negev, P.O.Box 9001, Be'er Sheva 84190, Israel
| | | | - Albert Danon
- Department of Chemistry, Nuclear Research Center-Negev, P.O.Box 9001, Be'er Sheva 84190, Israel
| | - Ze'ev Porat
- Department of Chemistry, Nuclear Research Center-Negev, P.O.Box 9001, Be'er Sheva 84190, Israel; Institutes for Applied Research, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Joseph Almog
- Institute of Chemistry, The Hebrew University, Jerusalem, Israel.
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8
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Vrlinic T, Buron CC, Lakard S, Husson J, Rougeot P, Gauthier M, Lakard B. Evaluation of Adhesion Forces for the Manipulation of Micro-Objects in Submerged Environment through Deposition of pH Responsive Polyelectrolyte Layers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:102-111. [PMID: 26632761 DOI: 10.1021/acs.langmuir.5b03575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Optimization of surface treatment for reversible adhesion of micro-objects in liquid environment for the need in microassembly processes is presented. A spherical borosilicate probe and planar oxidized silicon wafer substrates were modified by deposition of pH sensitive polyelectrolyte films through layer-by-layer technique. Branched polyethylenimine (b-PEI) and poly(sodium styrenesulfonate) (PSS) were deposited in alternating manner on surfaces, and the influence of polyelectrolyte concentration, pH of deposition, and number of layers on the adhesion were successively examined. The multilayer buildup was followed by optical reflectometry (OR) and dissipative quartz crystal microbalance (QCM-D). The adhesion forces were monitored in aqueous environment at variable pH values by colloidal probe AFM microscopy. The thermodynamic work of adhesion was derived from the pull-off forces by using the Johnson-Kendall-Roberts (JKR) model and compared to the work of adhesion determined from contact angle measurements. It was found out that they correlate well, however, the values accessed from JKR model were underestimated, which was attributed mainly to the effect of surface roughness. Obtained results have demonstrated that it is possible to achieve repeatable reversible adhesion with the change of pH of submerged environment by appropriately tailoring the surface properties and therefore the prevailing surface forces.
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Affiliation(s)
- T Vrlinic
- Université de Bourgogne Franche-Comté, Institut UTINAM-UMR, CNRS 6213, 16 Route de Gray, 25030 cedex Besançon, France
| | - C C Buron
- Université de Bourgogne Franche-Comté, Institut UTINAM-UMR, CNRS 6213, 16 Route de Gray, 25030 cedex Besançon, France
| | - S Lakard
- Université de Bourgogne Franche-Comté, Institut UTINAM-UMR, CNRS 6213, 16 Route de Gray, 25030 cedex Besançon, France
| | - J Husson
- Université de Bourgogne Franche-Comté, Institut UTINAM-UMR, CNRS 6213, 16 Route de Gray, 25030 cedex Besançon, France
| | - P Rougeot
- Université de Bourgogne Franche-Comté, Institut FEMTO ST, Automat & MicroMechatron Syst Dept AS2M, CNRS, ENSMM, UTBM, F-25000 Besançon, France
| | - M Gauthier
- Université de Bourgogne Franche-Comté, Institut FEMTO ST, Automat & MicroMechatron Syst Dept AS2M, CNRS, ENSMM, UTBM, F-25000 Besançon, France
| | - B Lakard
- Université de Bourgogne Franche-Comté, Institut UTINAM-UMR, CNRS 6213, 16 Route de Gray, 25030 cedex Besançon, France
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9
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Kumawat N, Pal P, Varma M. Diffractive Optical Analysis for Refractive Index Sensing using Transparent Phase Gratings. Sci Rep 2015; 5:16687. [PMID: 26578408 PMCID: PMC4649337 DOI: 10.1038/srep16687] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 10/19/2015] [Indexed: 11/10/2022] Open
Abstract
We report the implementation of a micro-patterned, glass-based photonic sensing element that is capable of label-free biosensing. The diffractive optical analyzer is based on the differential response of diffracted orders to bulk as well as surface refractive index changes. The differential read-out suppresses signal drifts and enables time-resolved determination of refractive index changes in the sample cell. A remarkable feature of this device is that under appropriate conditions, the measurement sensitivity of the sensor can be enhanced by more than two orders of magnitude due to interference between multiply reflected diffracted orders. A noise-equivalent limit of detection (LoD) of 6 × 10−7 was achieved with this technique with scope for further improvement.
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Affiliation(s)
- Nityanand Kumawat
- Center for Nano Science and Engineering, Indian Institute of Science, Bangalore
| | - Parama Pal
- Robert Bosch Center for Cyber Physical Systems, Indian Institute of Science, Bangalore
| | - Manoj Varma
- Center for Nano Science and Engineering, Indian Institute of Science, Bangalore.,Dept of Electrical Communication Engineering, Indian Institute of Science, Bangalore
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10
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Label-free selection and enrichment of liver cancer stem cells by surface niches build up with polyelectrolyte multilayer films. Colloids Surf B Biointerfaces 2015; 125:120-6. [DOI: 10.1016/j.colsurfb.2014.11.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 11/14/2014] [Accepted: 11/17/2014] [Indexed: 01/15/2023]
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11
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Che HX, Yeap SP, Osman MS, Ahmad AL, Lim J. Directed assembly of bifunctional silica-iron oxide nanocomposite with open shell structure. ACS APPLIED MATERIALS & INTERFACES 2014; 6:16508-16518. [PMID: 25198872 DOI: 10.1021/am5050949] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The synthesis of nanocomposite with controlled surface morphology plays a key role for pollutant removal from aqueous environments. The influence of the molecular size of the polyelectrolyte in synthesizing silica-iron oxide core-shell nanocomposite with open shell structure was investigated by using dynamic light scattering, atomic force microscopy, and quartz crystal microbalance with dissipation (QCM-D). Here, poly(diallydimethylammonium chloride) (PDDA) was used to promote the attachment of iron oxide nanoparticles (IONPs) onto the silica surface to assemble a nanocomposite with magnetic and catalytic bifunctionality. High molecular weight PDDA tended to adsorb on silica colloid, forming a more extended conformation layer than low molecular weight PDDA. Subsequent attachment of IONPs onto this extended PDDA layer was more randomly distributed, forming isolated islands with open space between them. By taking amoxicillin, an antibiotic commonly found in pharmaceutical waste, as the model system, better removal was observed for silica-iron oxide nanocomposite with a more extended open shell structure.
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Affiliation(s)
- Hui Xin Che
- School of Chemical Engineering, Universiti Sains Malaysia , 14300 Nibong Tebal, Penang, Malaysia
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12
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Stevens B, Dessiatova E, Hagen DA, Todd AD, Bielawski CW, Grunlan JC. Low-temperature thermal reduction of graphene oxide nanobrick walls: unique combination of high gas barrier and low resistivity in fully organic polyelectrolyte multilayer thin films. ACS APPLIED MATERIALS & INTERFACES 2014; 6:9942-9945. [PMID: 24949524 DOI: 10.1021/am502889w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Layer-by-layer assembly from aqueous solutions was used to construct multilayer thin films (<200 nm) comprising polyethylenimine and graphene oxide. Low-temperature (175 °C) thermal reduction of these films improved gas barrier properties (e.g., lower permeability than SiOx), even under high humidity conditions, and enhanced their electrical conductivity to 1750 S/m. The flexible nature of the aforementioned thin films, along with their excellent combination of transport properties, make them ideal candidates for use in a broad range of electronics and packaging applications.
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Affiliation(s)
- Bart Stevens
- Department of Mechanical Engineering, Texas A&M University , College Station, Texas 77843-3123, United States
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Deligöz H, Tieke B. QCM-D study of layer-by-layer assembly of polyelectrolyte blend films and their drug loading-release behavior. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2013.10.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Micciulla S, Dodoo S, Chevigny C, Laschewsky A, von Klitzing R. Short versus long chain polyelectrolyte multilayers: a direct comparison of self-assembly and structural properties. Phys Chem Chem Phys 2014; 16:21988-98. [DOI: 10.1039/c4cp03439b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Optimization of the layer-by-layer growth of short chain (∼30 repeat units per chain) polyelectrolyte multilayers and comparison with classical long chain systems.
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Affiliation(s)
- Samantha Micciulla
- Stranski-Laboratorium
- Institut für Chemie
- Technische Universität Berlin
- D-10623 Berlin, Germany
| | - Samuel Dodoo
- Stranski-Laboratorium
- Institut für Chemie
- Technische Universität Berlin
- D-10623 Berlin, Germany
| | - Chloé Chevigny
- Stranski-Laboratorium
- Institut für Chemie
- Technische Universität Berlin
- D-10623 Berlin, Germany
| | - André Laschewsky
- Institut für Chemie
- Universität Potsdam
- 14476 Postdam-Golm, Germany
- Fraunhofer-Institut für Angewandte Polymerforschung
- , Germany
| | - Regine von Klitzing
- Stranski-Laboratorium
- Institut für Chemie
- Technische Universität Berlin
- D-10623 Berlin, Germany
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15
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Shi R, Na N, Jiang F, Ouyang J. Characterization of rhodamine self-assembled films using desorption electrospray ionization mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:966-974. [PMID: 23559075 DOI: 10.1007/s13361-013-0601-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 02/09/2013] [Accepted: 02/12/2013] [Indexed: 06/02/2023]
Abstract
Growth process information and molecular structure identification are very important for characterization of self-assembled films. Here, we explore the possible application of desorption electrospray ionization mass spectrometry (DESI-MS) that provides the assembled information of rhodamine B (Rh B) and rhodamine 123 (Rh 123) films. With the help of lab-made DESI source, two characteristic ions [Rh B](+) and [Rh 123](+) are observed directly in the open environment. To evaluate the reliability of this technique, a comparative study of ultraviolet-visible (UV-vis) spectroscopy and our method is carried out, and the result shows good correlation. According to the signal intensity of characteristic ions, the layer-by-layer adsorption process of dyes can be monitored, and the thicknesses of multilayer films can also be comparatively determined. Combining the high sensitivity, selectivity, and speed of mass spectrometry, the selective adsorption of similar structure molecules under different pH is recognized easily from extracted ion chronograms. The variation trend of dyes signalling intensity with concentration of polyelectrolyte is studied as well, which reflects the effect of surface charge on dyes deposition. Additionally, the desorption area, surface morphology, and thicknesses of multilayer films are investigated using fluorescence microscope, scanning electron microscope (SEM), and atomic force microscopy (AFM), respectively. Because the desorption area was approximately as small as 2 mm(2), the distribution situation of organic dyes in an arbitrary position could be gained rapidly, which means DESI-MS has advantages on in situ analysis.
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Affiliation(s)
- Ruixia Shi
- College of Chemistry, Beijing Normal University, Beijing, People's Republic of China
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16
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Costa RR, Testera AM, Arias FJ, Rodríguez-Cabello JC, Mano JF. Layer-by-layer film growth using polysaccharides and recombinant polypeptides: a combinatorial approach. J Phys Chem B 2013; 117:6839-48. [PMID: 23662646 DOI: 10.1021/jp4028518] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Nanostructured films consisting of polysaccharides and elastin-like recombinamers (ELRs) are fabricated in a layer-by-layer manner. A quartz-crystal microbalance with dissipation monitoring (QCM-D) is used to follow the buildup of hybrid films containing one polysaccharide (chitosan or alginate) and one of several ELRs that differ in terms of amino acid content, length, and biofunctionality in situ at pH 4.0 and pH 5.5. The charge density of the ingredients at each pH is determined by measuring their ζ-potential, and the thickness of a total of 36 different films containing five bilayers is estimated using the Voigt-based viscoelastic model. A comparison of the values obtained reveals that thicker films can be obtained when working at a pH close to the acidity constant of the polysaccharide used (near-pKa conditions), suggesting that the construction of such films is more favorable when based on the presence of hydrophobic interactions between ELRs and partially neutralized polysaccharides. Further analysis shows that the molecular weight of the ELRs plays only a minor role in defining the growth tendency. When taken together, these results point to the most favorable conditions for constructing nanostructured films from natural and distinct recombinant polypeptides that can be tuned to exhibit specialized biofunctionality for tissue-engineering, drug-delivery, and biotechnological applications.
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Affiliation(s)
- Rui R Costa
- University of Minho, 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark, 4806-909 Caldas das Taipas, Guimarães, Portugal
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17
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Porus M, Maroni P, Borkovec M. Response of adsorbed polyelectrolyte monolayers to changes in solution composition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:17506-17516. [PMID: 23171242 DOI: 10.1021/la303937g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Reflectometry and quartz crystal microbalance are used to study the response of adsorbed polyelectrolyte monolayers to solutions of variable composition. These techniques respectively yield the dry and wet masses of the adsorbed layer, and by combing these results, one obtains the water content and the thickness of the polyelectrolyte films. The systems investigated are films of adsorbed poly(allyl amine) (PAH) and poly-L-lysine (PLL) on silica and films of poly(styrene sulfonate) (PSS) on amino-functionalized silica. When such films are adsorbed from concentrated polyelectrolyte solutions containing high levels of salt, they are found to swell reversibly up to a factor of 2 when incubated in solutions of low salt. This swelling is attributed to the strengthening of repulsive electrostatic interactions between the adsorbed polyelectrolyte chains. PAH films may also swell upon decrease of pH, and collapse upon a pH increase. This transition shows a marked hysteresis and can be rationalized by the competition of electrostatic repulsions between the chains and their attraction to the surface. The presently observed swelling phenomena are caused by a collective process driven by the electrostatic repulsion between the densely adsorbed polyelectrolyte chains. Such responsive layers are only obtained by adsorption from high polyelectrolyte and salt concentrations. Layers absorbed at low polyelectrolyte and salt concentrations show only minor swelling effects, since the adsorbed polyelectrolytes layers are dilute and the adsorbed polyelectrolyte chains interact only weakly.
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Affiliation(s)
- Maria Porus
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30, Quai Ernest-Ansermet, 1205 Geneva, Switzerland
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18
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Guntupalli R, Sorokulova I, Olsen E, Globa L, Pustovyy O, Moore T, Chin B, Barbaree J, Vodyanoy V. Detection and identification of methicillin resistant and sensitive strains of Staphylococcus aureus using tandem measurements. J Microbiol Methods 2012; 90:182-91. [DOI: 10.1016/j.mimet.2012.05.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Revised: 04/28/2012] [Accepted: 05/04/2012] [Indexed: 02/01/2023]
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Westwood M, Kirby AR, Parker R, Morris VJ. Combined QCMD and AFM studies of lysozyme and poly-L-lysine-poly-galacturonic acid multilayers. Carbohydr Polym 2012; 89:1222-31. [PMID: 24750935 DOI: 10.1016/j.carbpol.2012.03.097] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Revised: 01/31/2012] [Accepted: 03/31/2012] [Indexed: 11/15/2022]
Abstract
A quartz crystal microbalance with dissipation monitoring (QCMD) has been used to monitor the adsorption and structure of lysozyme monolayers and multilayers, and poly-L-lysine (PLL)-polygalacturonic acid (PGalA) multilayers at a solid-liquid interface using freshly-cleaved mica as a substrate. QCMD measurements were complemented with atomic force microscopy (AFM). AFM images revealed that lysozyme formed incomplete monolayers and provided a basis for calculation of the thickness of the protein film. Comparative studies of adsorption onto standard and mica-coated quartz crystals showed higher areal mass adsorption and a longer-time adsorption process for mica-coated quartz crystals. Simultaneous AFM images and QCMD data were obtained for lysozyme, linear PLL-PGalA and 7 nm PLL dendrimer-PGalA multilayers. The layer-by-layer deposited multilayer films exhibited viscoelastic properties and their growth followed a non-linear regime, associated with the PLL diffusion in and out of the film formation for linear PLL-PGalA films. For the PLL 7 nm dendrimer-PGalA films the AFM images revealed marked changes in surface roughness during layer by layer deposition: these changes influence the interpretation of the QCMD data and provide additional information on the growth and structure of the multilayers.
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Affiliation(s)
- Marta Westwood
- Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
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Graisuwan W, Wiarachai O, Ananthanawat C, Puthong S, Soogarun S, Kiatkamjornwong S, Hoven VP. Multilayer film assembled from charged derivatives of chitosan: Physical characteristics and biological responses. J Colloid Interface Sci 2012; 376:177-88. [DOI: 10.1016/j.jcis.2012.02.039] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2011] [Revised: 02/17/2012] [Accepted: 02/18/2012] [Indexed: 12/01/2022]
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O'Connell MA, de Cuendias A, Gayet F, Shirley IM, Mackenzie SR, Haddleton DM, Unwin PR. Evanescent wave cavity ring-down spectroscopy (EW-CRDS) as a probe of macromolecule adsorption kinetics at functionalized interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6902-6910. [PMID: 22489550 DOI: 10.1021/la3006053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Evanescent wave cavity ring-down spectroscopy (EW-CRDS) has been employed to study the interfacial adsorption kinetics of coumarin-tagged macromolecules onto a range of functionalized planar surfaces. Such studies are valuable in designing polymers for complex systems where the degree of interaction between the polymer and surface needs to be tailored. Three tagged synthetic polymers with different functionalities are examined: poly(acrylic acid) (PAA), poly(3-sulfopropyl methacrylate, potassium salt) (PSPMA), and a mannose-modified glycopolymer. Adsorption transients at the silica/water interface are found to be characteristic for each polymer, and kinetics are deduced from the initial rates. The chemistry of the adsorption interfaces has been varied by, first, manipulation of silica surface chemistry via the bulk pH, followed by surfaces modified by poly(L-glutamic acid) (PGA) and cellulose, giving five chemically different surfaces. Complementary atomic force microscopy (AFM) imaging has been used for additional surface characterization of adsorbed layers and functionalized interfaces to allow adsorption rates to be interpreted more fully. Adsorption rates for PSPMA and the glycopolymer are seen to be highly surface sensitive, with significantly higher rates on cellulose-modified surfaces, whereas PAA shows a much smaller rate dependence on the nature of the adsorption surface.
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Malinin AS, Kalashnikova IV, Rakhnyanskaya AA, Yaroslavov AA. Adsorption of cationic polymers on the surfaces of anionic glass microspheres. POLYMER SCIENCE SERIES A 2012. [DOI: 10.1134/s0965545x1201004x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kepplinger C, Lisdat F, Wollenberger U. Cytochrome c/polyelectrolyte multilayers investigated by E-QCM-D: effect of temperature on the assembly structure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8309-8315. [PMID: 21634413 DOI: 10.1021/la200860p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Protein multilayers, consisting of cytochrome c (cyt c) and poly(aniline sulfonic acid) (PASA), are investigated by electrochemical quartz crystal microbalance with dissipation monitoring (E-QCM-D). This technique reveals that a four-bilayer assembly has rather rigid properties. A thickness of 16.3 ± 0.8 nm is calculated with the Sauerbrey equation and is found to be in good agreement with a viscoelastic model. The electroactive amount of cyt c is estimated by the deposited mass under the assumption of 50% coupled water. Temperature-induced stabilization of the multilayer assembly has been investigated in the temperature range between 30 and 45 °C. The treatment results in a loss of material and a contraction of the film. The electroactive amount of cyt c also decreases during heating and remains constant after the cooling period. The contraction of the film is accompanied by the enhanced stability of the assembly. In addition, it is found that cyt c and PASA can be assembled at higher temperatures, resulting in the formation of multilayer systems with less dissipation.
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Affiliation(s)
- Christian Kepplinger
- Biosystems Technology, Wildau University of Applied Science, Bahnhofstrasse 1, 15745 Wildau, Germany
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Liu X, Goli KK, Genzer J, Rojas OJ. Multilayers of weak polyelectrolytes of low and high molecular mass assembled on polypropylene and self-assembled hydrophobic surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:4541-4550. [PMID: 21410223 DOI: 10.1021/la200349p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Hydrophobic self-assembled octadecyltrichlorosilane (ODTS), ultrathin films of polypropylene, and ODTS modified with cationic dioctadecyldimethylammonium bromide are employed as substrates for deposition of multilayers of poly(allylamine hydrochloride) and poly(acrylic acid) from aqueous solution. The assembly of highly dissipative polyelectrolyte multilayers (PEMs) is demonstrated by quartz crystal microgravimetry. The initial rate of adsorption is faster and the adsorbed amount larger on the cationic surface, while the detailed structure of the PEMs, as determined by atomic force microscopy imaging, is related primarily to the molecular weight of the adsorbing polymers. A more extensive PEM adsorption on the hydrophobic surfaces takes place with increasing ionic strength of the background electrolyte solution. The water contact angle depends on the type of polymer adsorbed as the outermost layer, indicating that, despite the expected interdiffusion for the different polymer chains, there is a net macromolecular segregation to the free surface. Surface modification with the high molecular weight PEMs produces a more marked reduction of the hydrophilicity of the substrate.
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Affiliation(s)
- Xiaomeng Liu
- Department of Forest Biomaterials, North Carolina State University, Raleigh, North Carolina 27695, USA
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Song J, Yamagushi T, Silva DJ, Hubbe MA, Rojas OJ. Effect of Charge Asymmetry on Adsorption and Phase Separation of Polyampholytes on Silica and Cellulose Surfaces. J Phys Chem B 2009; 114:719-27. [DOI: 10.1021/jp909047t] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Junlong Song
- Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, North Carolina 27695-8005, Nippon Paper Industries Co., Ltd., 1-2-2, Hitotsubashi, Chiyoda-ku, Tokyo 100-0003, Japan, Department of Chemical Engineering, Polytechnic School of São Paulo University, SP, Brazil, and Department of Forest Products Technology, Faculty of Chemistry and Materials Sciences, Helsinki University of Technology, P.O. Box 3320, FIN-02015 TKK, Espoo, Finland
| | - Takashi Yamagushi
- Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, North Carolina 27695-8005, Nippon Paper Industries Co., Ltd., 1-2-2, Hitotsubashi, Chiyoda-ku, Tokyo 100-0003, Japan, Department of Chemical Engineering, Polytechnic School of São Paulo University, SP, Brazil, and Department of Forest Products Technology, Faculty of Chemistry and Materials Sciences, Helsinki University of Technology, P.O. Box 3320, FIN-02015 TKK, Espoo, Finland
| | - Deusanilde J. Silva
- Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, North Carolina 27695-8005, Nippon Paper Industries Co., Ltd., 1-2-2, Hitotsubashi, Chiyoda-ku, Tokyo 100-0003, Japan, Department of Chemical Engineering, Polytechnic School of São Paulo University, SP, Brazil, and Department of Forest Products Technology, Faculty of Chemistry and Materials Sciences, Helsinki University of Technology, P.O. Box 3320, FIN-02015 TKK, Espoo, Finland
| | - Martin A. Hubbe
- Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, North Carolina 27695-8005, Nippon Paper Industries Co., Ltd., 1-2-2, Hitotsubashi, Chiyoda-ku, Tokyo 100-0003, Japan, Department of Chemical Engineering, Polytechnic School of São Paulo University, SP, Brazil, and Department of Forest Products Technology, Faculty of Chemistry and Materials Sciences, Helsinki University of Technology, P.O. Box 3320, FIN-02015 TKK, Espoo, Finland
| | - Orlando J. Rojas
- Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, North Carolina 27695-8005, Nippon Paper Industries Co., Ltd., 1-2-2, Hitotsubashi, Chiyoda-ku, Tokyo 100-0003, Japan, Department of Chemical Engineering, Polytechnic School of São Paulo University, SP, Brazil, and Department of Forest Products Technology, Faculty of Chemistry and Materials Sciences, Helsinki University of Technology, P.O. Box 3320, FIN-02015 TKK, Espoo, Finland
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