1
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Popova TO, Zhulina EB, Borisov OV. Interaction of Polyanionic and Polycationic Brushes with Globular Proteins and Protein-like Nanocolloids. Biomimetics (Basel) 2023; 8:597. [PMID: 38132536 PMCID: PMC10741738 DOI: 10.3390/biomimetics8080597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 11/25/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023] Open
Abstract
A large number of experimental studies have demonstrated that globular proteins can be absorbed from the solution by both polycationic and polyanionic brushes when the net charge of protein globules is of the same or of the opposite sign with respect to that of brush-forming polyelectrolyte chains. Here, we overview the results of experimental studies on interactions between globular proteins and polycationic or polyanionic brushes, and present a self-consistent field theoretical model that allows us to account for the asymmetry of interactions of protein-like nanocolloid particles comprising weak (pH-sensitive) cationic and anionic groups with a positively or negatively charged polyelectrolyte brush. The position-dependent insertion free energy and the net charge of the particle are calculated. The theoretical model predicts that if the numbers of cationic and anionic ionizable groups of the protein are approximately equal, then the interaction patterns for both cationic and anionic brushes at equal offset on the "wrong side" from the isoelectric point (IEP), i.e., when the particle and the brush charge are of the same sign, are similar. An essential asymmetry in interactions of particles with polycationic and polyanionic brushes is predicted when fractions of cationic and anionic groups differ significantly. That is, at a pH above IEP, the anionic brush better absorbs negatively charged particles with a larger fraction of ionizable cationic groups and vice versa.
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Affiliation(s)
- Tatiana O. Popova
- Chemical Engineering Center, National Research University ITMO, 199004 St. Petersburg, Russia;
- Institute of Macromolecular Compoundsof the Russian Academy of Sciences, 199004 St. Petersburg, Russia;
| | - Ekaterina B. Zhulina
- Institute of Macromolecular Compoundsof the Russian Academy of Sciences, 199004 St. Petersburg, Russia;
| | - Oleg V. Borisov
- Chemical Engineering Center, National Research University ITMO, 199004 St. Petersburg, Russia;
- Institute of Macromolecular Compoundsof the Russian Academy of Sciences, 199004 St. Petersburg, Russia;
- CNRS, Université de Pau et des Pays de l’Adour UMR 5254, Institut des Sciences Analytiques et de Physico-Chimie Pour l’Environnement et les Matériaux, 64053 Pau, France
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2
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Intisar A, Ramzan A, Sawaira T, Kareem AT, Hussain N, Din MI, Bilal M, Iqbal HMN. Occurrence, toxic effects, and mitigation of pesticides as emerging environmental pollutants using robust nanomaterials - A review. CHEMOSPHERE 2022; 293:133538. [PMID: 34998849 DOI: 10.1016/j.chemosphere.2022.133538] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/23/2021] [Accepted: 01/03/2022] [Indexed: 02/08/2023]
Abstract
Increasing demand of food and agriculture is leading us towards the increasing use and introduction of pesticides to the environment. The upright increase of pesticides in water and associated adverse effects have become a great point of concern to develop proficient methods for their mitigation from water. Various different methods have been traditionally employed for this purpose. Recently, nanotechnology has turned out to be the field of prodigious interest for this purpose, and various specific methods were developed and employed to remove pesticides from water. In this study, nanotechnological methods such as adsorption and degradation have been thoroughly discussed along with their applications and limitations where different types of nanoparticles, nanocomposites, nanotubes, and nanomembranes have played a vital role. However, in this study the most commonly adopted method of adsorption is considered to be the better technique due to its low cost, efficiency, and ease of operation. The adsorption kinetic models were described to explain the efficiency of the nano-adrsorbants in order to evaluate the mass transfer processes. However, various degradation methodologies including photocatalysis and catalytic reduction have also been elaborated. Numerous robust metal, metal oxide and functionalized magnetic nanomaterials have been emphasized, categorized, and compared for the removal of pesticides from water. Additionally, current challenges faced by researchers and future directions have also been provided.
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Affiliation(s)
- Azeem Intisar
- School of Chemistry, University of the Punjab, 54590, Pakistan
| | - Arooj Ramzan
- School of Chemistry, University of the Punjab, 54590, Pakistan
| | - Tehzeeb Sawaira
- School of Chemistry, University of the Punjab, 54590, Pakistan
| | - Ama Tul Kareem
- School of Chemistry, University of the Punjab, 54590, Pakistan
| | - Nazim Hussain
- Center for Applied Molecular Biology (CAMB), University of the Punjab Lahore, Pakistan
| | | | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China.
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico.
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3
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Krieger A, Zika A, Gröhn F. Functional Nano-Objects by Electrostatic Self-Assembly: Structure, Switching, and Photocatalysis. Front Chem 2022; 9:779360. [PMID: 35359487 PMCID: PMC8961288 DOI: 10.3389/fchem.2021.779360] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Accepted: 11/30/2021] [Indexed: 11/14/2022] Open
Abstract
The design of functional nano-objects by electrostatic self-assembly in solution signifies an emerging field with great potential. More specifically, the targeted combination of electrostatic interaction with other effects and interactions, such as the positioning of charges on stiff building blocks, the use of additional amphiphilic, π−π stacking building blocks, or polyelectrolytes with certain architectures, have recently promulgated electrostatic self-assembly to a principle for versatile defined structure formation. A large variety of architectures from spheres over rods and hollow spheres to networks in the size range of a few tenths to a few hundred nanometers can be formed. This review discusses the state-of-the-art of different approaches of nano-object formation by electrostatic self-assembly against the backdrop of corresponding solid materials and assemblies formed by other non-covalent interactions. In this regard, particularly promising is the facile formation of triggerable structures, i.e. size and shape switching through light, as well as the use of electrostatically assembled nano-objects for improved photocatalysis and the possible solar energy conversion in the future. Lately, this new field is eliciting an increasing amount of understanding; insights and limitations thereof are addressed in this article. Special emphasis is placed on the interconnection of molecular building block structures and the resulting nanoscale architecture via the key of thermodynamics.
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4
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Achazi K, Haag R, Ballauff M, Dernedde J, Kizhakkedathu JN, Maysinger D, Multhaup G. Understanding the Interaction of Polyelectrolyte Architectures with Proteins and Biosystems. Angew Chem Int Ed Engl 2021; 60:3882-3904. [PMID: 32589355 PMCID: PMC7894192 DOI: 10.1002/anie.202006457] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Indexed: 02/06/2023]
Abstract
The counterions neutralizing the charges on polyelectrolytes such as DNA or heparin may dissociate in water and greatly influence the interaction of such polyelectrolytes with biomolecules, particularly proteins. In this Review we give an overview of studies on the interaction of proteins with polyelectrolytes and how this knowledge can be used for medical applications. Counterion release was identified as the main driving force for the binding of proteins to polyelectrolytes: Patches of positive charge become multivalent counterions of the polyelectrolyte and lead to the release of counterions from the polyelectrolyte and a concomitant increase in entropy. This is shown from investigations on the interaction of proteins with natural and synthetic polyelectrolytes. Special emphasis is paid to sulfated dendritic polyglycerols (dPGS). The Review demonstrates that we are moving to a better understanding of charge-charge interactions in systems of biological relevance. Research along these lines will aid and promote the design of synthetic polyelectrolytes for medical applications.
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Affiliation(s)
- Katharina Achazi
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
| | - Rainer Haag
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
| | - Matthias Ballauff
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
- IRIS AdlershofHumboldt Universität zu BerlinZum Grossen Windkanal 612489BerlinGermany
| | - Jens Dernedde
- Charité-Universitätsmedizin BerlinInstitute of Laboratory MedicineClinical Chemistry, and PathobiochemistryCVK Augustenburger Platz 113353BerlinGermany
| | - Jayachandran N. Kizhakkedathu
- Centre for Blood ResearchDepartment of Pathology and Laboratory MedicineLife Science InstituteDepartment of ChemistrySchool of Biomedical EngineeringUniversity of British ColumbiaVancouverV6T 1Z3Canada
| | - Dusica Maysinger
- Department of Pharmacology and TherapeuticsMcGill UniversityMontrealH3G 1Y6Canada
| | - Gerd Multhaup
- Department of Pharmacology and TherapeuticsMcGill UniversityMontrealH3G 1Y6Canada
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5
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Zhang R, Fu Q, Zhu D, Shen Z, Zhou K, Yao Y, Zhu X. CO2-Responsive Spherical Polyelectrolyte Brush with Multi-Stimulation for Reversible Protein Immobilization and Release. Aust J Chem 2021. [DOI: 10.1071/ch20099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Multi-responsive materials have received extensive interest in many areas due to their smart characteristics. This paper presents rationally designed multi-responsive spherical polyelectolyte brushes composed of a solid polystyrene (PS) core and a poly (2-(dimethylamino) ethyl methacrylate) (PDMAEMA) shell synthesized by photoemulsion polymerization. Based on dynamic light scattering, Zeta potential, turbidity measurements, isothermal titration calorimetry, and UV-vis spectroscopy, PS-PDMAEMA works as a good potential adsorbent for bovine serum albumin (BSA) for which the maximum adsorption capability could reach up to 5190mg g−1. Moreover, the immobilization and release of protein on the polymer brush could be adjusted with different triggers, including the pH, ionic strength, and temperature. Furthermore, the green gas triggers, CO2 and N2, could be employed in the BSA@ PS-PDMAEMA system by easily bubbling over many cycles without any salt accumulation. The main reason for the observed actions is the brushes could be switched alternately between extended and collapsed states with different stimulations. Upon comparing the circular dichroism spectra of original and released BSA after many cycles of adsorption and release, it’s clear that the protein can retain its initial biological activity after release from the PS-PDMAEMA. This work provides an effective and green way to immobilize and release proteins in biotechnology.
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Walkowiak J, Gradzielski M, Zauscher S, Ballauff M. Interaction of Proteins with a Planar Poly(acrylic acid) Brush: Analysis by Quartz Crystal Microbalance with Dissipation Monitoring (QCM-D). Polymers (Basel) 2020; 13:polym13010122. [PMID: 33396873 PMCID: PMC7795234 DOI: 10.3390/polym13010122] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 12/27/2022] Open
Abstract
We describe the preparation of a poly(acrylic acid) (PAA) brush, polymerized by atom transfer radical polymerization (ATRP) of tert-butyl acrylate (tBA) and subsequent acid hydrolysis, on the flat gold surfaces of quartz-crystal microbalance (QCM) crystals. The PAA brushes were characterized by Fourier transform infrared (FT-IR) spectroscopy, ellipsometry and water contact angle analysis. The interaction of the PAA brushes with human serum albumin (HSA) was studied for a range of ionic strengths and pH conditions by quartz-crystal microbalance with dissipation monitoring (QCM-D). The quantitative analysis showed a strong adsorption of protein molecules onto the PAA brush. By increasing the ionic strength, we were able to release a fraction of the initially bound HSA molecules. This finding highlights the importance of counterions in the polyelectrolyte-mediated protein adsorption/desorption. A comparison with recent calorimetric studies related to the binding of HSA to polyelectrolytes allowed us to fully analyze the QCM data based on the results of the thermodynamic analysis of the binding process.
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Affiliation(s)
- Jacek Walkowiak
- Aachen-Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Brightlands Chemelot Campus, Urmonderbaan 22, 6167 RD Geleen, The Netherlands;
| | - Michael Gradzielski
- Stranski Laboratorium für Physikalische Chemie und Theoretische Chemie, Institut für Chemie, Straße des 17. Juni 124, Sekr. TC7, Technische Universität Berlin, 10623 Berlin, Germany;
| | - Stefan Zauscher
- Mechanical Engineering and Material Sciences, Duke University, Durham, NC 27708, USA
- Correspondence: (S.Z.); (M.B.)
| | - Matthias Ballauff
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
- Correspondence: (S.Z.); (M.B.)
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7
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Achazi K, Haag R, Ballauff M, Dernedde J, Kizhakkedathu JN, Maysinger D, Multhaup G. Wechselwirkung von Polyelektrolyt‐Architekturen mit Proteinen und Biosystemen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006457] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Katharina Achazi
- Institut für Chemie und Biochemie Freie Universität Berlin Takustraße 3 14195 Berlin Deutschland
| | - Rainer Haag
- Institut für Chemie und Biochemie Freie Universität Berlin Takustraße 3 14195 Berlin Deutschland
| | - Matthias Ballauff
- Institut für Chemie und Biochemie Freie Universität Berlin Takustraße 3 14195 Berlin Deutschland
- IRIS Adlershof Humboldt-Universität zu Berlin Zum Großen Windkanal 6 12489 Berlin Deutschland
| | - Jens Dernedde
- Charité-Universitätsmedizin Berlin Institut für Laboratoriumsmedizin Klinische Chemie und Pathobiochemie CVK Augustenburger Platz 1 13353 Berlin Deutschland
| | - Jayachandran N. Kizhakkedathu
- Centre for Blood Research Department of Pathology and Laboratory Medicine Life Science Institute Department of Chemistry School of Biomedical Engineering University of British Columbia Vancouver V6T 1Z3 Kanada
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics McGill University Montreal H3G 1Y6 Kanada
| | - Gerd Multhaup
- Department of Pharmacology and Therapeutics McGill University Montreal H3G 1Y6 Kanada
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8
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Czeslik C, Wittemann A. Adsorption mechanism, secondary structure and local distribution of proteins at polyelectrolyte brushes. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-019-04590-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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9
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Li K, Chen K, Wang Q, Zhang Y, Gan W. Synthesis of poly(acrylic acid) coated magnetic nanospheres via a multiple polymerization route. ROYAL SOCIETY OPEN SCIENCE 2019; 6:190141. [PMID: 31417720 PMCID: PMC6689630 DOI: 10.1098/rsos.190141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 05/28/2019] [Indexed: 05/31/2023]
Abstract
Magnetic nanospheres are versatile candidates for both fundamental and practical applications. Before they are applied in more complicated fields, their surface must be modified by several functionalities. However, the surface modification can be affected by the magnetic nanoparticles (MNP) embedded in the polymer matrix. Herein, the synthesis of poly(acrylic acid) coated magnetic nanospheres via a multiple polymerization route is described. During the synthesis process, seed emulsion polymerization was applied to redistribute the MNP in the polymer matrix, and the relationship between the structure of magnetic nanospheres and the thickness of the grafted poly(acrylic acid) layer was investigated. The development of size, morphology and magnetic properties of the nanospheres were characterized by transmission electron microscopy, dynamic light scattering, thermogravimetric analysis, X-ray diffraction and vibrating sample magnetometry. This work would pave the way to design and preparation of new structure of functional magnetic nanospheres with precise surface modification.
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Affiliation(s)
- Kai Li
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, People's Republic of China
| | - Kaimin Chen
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, People's Republic of China
| | - Qiaoling Wang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, People's Republic of China
| | - Ying Zhang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Wenjun Gan
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, People's Republic of China
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10
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Xu X, Angioletti-Uberti S, Lu Y, Dzubiella J, Ballauff M. Interaction of Proteins with Polyelectrolytes: Comparison of Theory to Experiment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5373-5391. [PMID: 30095921 DOI: 10.1021/acs.langmuir.8b01802] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We discuss recent investigations of the interaction of polyelectrolytes with proteins. In particular, we review our recent studies on the interaction of simple proteins such as human serum albumin (HSA) and lysozyme with linear polyelectrolytes, charged dendrimers, charged networks, and polyelectrolyte brushes. In all cases discussed here, we combined experimental work with molecular dynamics (MD) simulations and mean-field theories. In particular, isothermal titration calorimetry (ITC) has been employed to obtain the respective binding constants Kb and the Gibbs free energy of binding. MD simulations with explicit counterions but implicit water demonstrate that counterion release is the main driving force for the binding of proteins to strongly charged polyelectrolytes: patches of positive charges located on the surface of the protein become multivalent counterions of the polyelectrolyte, thereby releasing a number of counterions condensed on the polyelectrolyte. The binding Gibbs free energy due to counterion release is predicted to scale with the logarithm of the salt concentration in the system, which is verified by both simulations and experiment. In several cases, namely, for the interaction of proteins with linear polyelectrolytes and highly charged hydrophilic dendrimers, the binding constant could be calculated from simulations to very good approximation. This finding demonstrated that in these cases explicit hydration effects do not contribute to the Gibbs free energy of binding. The Gibbs free energy can also be used to predict the kinetics of protein uptake by microgels for a given system by applying dynamic density functional theory. The entire discussion demonstrates that the direct comparison of theory with experiments can lead to a full understanding of the interaction of proteins with charged polymers. Possible implications for applications, such as drug design, are discussed.
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Affiliation(s)
- Xiao Xu
- School of Chemical Engineering , Nanjing University of Science and Technology , 200 Xiao Ling Wei , Nanjing 210094 , P. R. China
| | - Stefano Angioletti-Uberti
- Department of Materials , Imperial College London , London SW7 2AZ - UK , U.K
- International Research Centre for Soft Matter , Beijing University of Chemical Technology , 100099 Beijing , PR China
| | - Yan Lu
- Soft Matter and Functional Materials , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , 14109 Berlin , Germany
- Institute of Chemistry , University of Potsdam , 14467 Potsdam , Germany
| | - Joachim Dzubiella
- Soft Matter and Functional Materials , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , 14109 Berlin , Germany
- Physikalisches Institut , Albert-Ludwigs-Universität , 79104 Freiburg , Germany
| | - Matthias Ballauff
- Soft Matter and Functional Materials , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , 14109 Berlin , Germany
- Institut für Physik , Humboldt-Universität zu Berlin , 12489 Berlin , Germany
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11
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Bojer C, Ament K, Schmalz H, Breu J, Lunkenbein T. Electrostatic attraction of nanoobjects – a versatile strategy towards mesostructured transition metal compounds. CrystEngComm 2019. [DOI: 10.1039/c9ce00228f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This highlight summarizes current challenges of mesostructuring and focuses on the scope and the potential of the ELAN – (electrostatic attraction of nanoobjects) strategy in mesostructuring of transition metal compounds.
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Affiliation(s)
- Carina Bojer
- Department of Chemistry and Bavarian Polymer Institute
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Kevin Ament
- Department of Chemistry and Bavarian Polymer Institute
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Holger Schmalz
- Department of Chemistry and Bavarian Polymer Institute
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Josef Breu
- Department of Chemistry and Bavarian Polymer Institute
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Thomas Lunkenbein
- Fritz-Haber-Institut der Max-Planck-Gesellschaft
- Department of Inorganic Chemistry
- 14195 Berlin
- Germany
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12
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Microencapsulated self-healing polymers via controlled, surface initiated atom transfer radical polymerization from the surface of graphene oxide. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1603-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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13
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Shi P, Luo S, Voit B, Appelhans D, Zan X. A facile and efficient strategy to encapsulate the model basic protein lysozyme into porous CaCO3. J Mater Chem B 2018; 6:4205-4215. [DOI: 10.1039/c8tb00312b] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A method to load lysozyme, a model of basic protein, with high efficiency and high capacity has been developed by doping heparin into porous CaCO3 particles. Choosing suitable polyelectrolyte pairs during the layer-by-layer capsule fabrication process avoided losing the loaded lysozyme, and fully retained the bioactivity.
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Affiliation(s)
- Pengzhong Shi
- School of Ophthalmology and Optometry
- Eye Hospital
- School of Biomedical Engineering
- Wenzhou Medical University
- Wenzhou
| | - Shan Luo
- School of Ophthalmology and Optometry
- Eye Hospital
- School of Biomedical Engineering
- Wenzhou Medical University
- Wenzhou
| | - Brigitte Voit
- Leibniz-Institut für Polymerforschung Dresden e.V
- 01069 Dresden
- Germany
| | - Dietmar Appelhans
- Leibniz-Institut für Polymerforschung Dresden e.V
- 01069 Dresden
- Germany
| | - Xingjie Zan
- School of Ophthalmology and Optometry
- Eye Hospital
- School of Biomedical Engineering
- Wenzhou Medical University
- Wenzhou
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14
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Qi S. Particle Penetration into Polydisperse Polymer Brushes: A Theoretical Analysis. MACROMOL THEOR SIMUL 2017. [DOI: 10.1002/mats.201700029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shuanhu Qi
- Institut für Physik; Johannes Gutenberg-Universität Mainz; Staudingerweg 7 55099 Mainz Germany
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15
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He Y, Priestley RD, Liu R. A One-Step and Scalable Continuous-Flow Nanoprecipitation for Catalytic Reduction of Organic Pollutants in Water. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b02279] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuezhen He
- Ministry of Education Key Laboratory of Advanced
Civil
Engineering Material, School
of Materials Science and Engineering, and Institute for Advanced Study, Tongji University, Shanghai 201804,China
- Anhui Key Laboratory of Chemo-Biosensing and Ministry
of Education Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China
| | - Rodney D. Priestley
- Department of Chemical and Biological Engineering and Princeton Institute for the Science
and Technology of Materials, Princeton University, Princeton, New Jersey 08544, United States
| | - Rui Liu
- Ministry of Education Key Laboratory of Advanced
Civil
Engineering Material, School
of Materials Science and Engineering, and Institute for Advanced Study, Tongji University, Shanghai 201804,China
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16
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Yang X, Chen D, Zhao H. Silica particles with immobilized protein molecules and polymer brushes. Acta Biomater 2016; 29:446-454. [PMID: 26597547 DOI: 10.1016/j.actbio.2015.10.038] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 10/15/2015] [Accepted: 10/23/2015] [Indexed: 12/21/2022]
Abstract
In this research thermo-responsive polymer brushes and protein molecules are immobilized on the surfaces of silica particles by covalent bonds. Pyridyl disulfide functionalized silica particles are prepared by surface chemical reactions, and thiol-terminated poly(oligo(ethylene glycol) monomethyl ether methacrylate) (POEGMA) and bovine serum albumin (BSA) molecules are grafted to the silica particles by thiol-disulfide exchange reactions. X-ray photoelectron spectroscopy, thermogravimetric analysis, dynamic light scattering, confocal laser scanning microscopy, far-UV circular dichroism and transmission electron microscopy are employed to characterize the polymer/protein mixed layers on silica particles. The POEGMA brushes not only protect the protein molecules but also improve the dispersibility of the hybrid particles in aqueous solution. The activity of the immobilized BSA protein can be controlled by the thermo-responsive POEGMA brushes. At a temperature below the lower critical solution temperature (LCST) of POEGMA, BSA activity is not affected by polymer brushes; however, BSA activity decreases significantly at a temperature above the LCST of POEGMA. STATEMENT OF SIGNIFICANCE In this research, both protein molecules and polymer brushes were anchored to the silica particles by highly efficient thiol-disulfide exchange reaction, and their grafting density can easily be determined by UV-vis. Owing to the temperature-sensitive nature of the grafted polymer brushes, the protein molecules can be protected by the collapsed polymer brushes above the LCST, and their catalytic activity can be controlled. Moreover, the protein molecules on silica particles can be easily separated from the solution and can be reused.
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Affiliation(s)
- Xiaona Yang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Department of Chemistry, Nankai University, Tianjin 300071, PR China
| | - Dawei Chen
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Department of Chemistry, Nankai University, Tianjin 300071, PR China
| | - Hanying Zhao
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Department of Chemistry, Nankai University, Tianjin 300071, PR China.
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17
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Gröschel AH, Müller AHE. Self-assembly concepts for multicompartment nanostructures. NANOSCALE 2015; 7:11841-76. [PMID: 26123217 DOI: 10.1039/c5nr02448j] [Citation(s) in RCA: 236] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Compartmentalization is ubiquitous to many biological and artificial systems, be it for the separate storage of incompatible matter or to isolate transport processes. Advancements in the synthesis of sequential block copolymers offer a variety of tools to replicate natural design principles with tailor-made soft matter for the precise spatial separation of functionalities on multiple length scales. Here, we review recent trends in the self-assembly of amphiphilic block copolymers to multicompartment nanostructures (MCNs) under (semi-)dilute conditions, with special emphasis on ABC triblock terpolymers. The intrinsic immiscibility of connected blocks induces short-range repulsion into discrete nano-domains stabilized by a third, soluble block or molecular additive. Polymer blocks can be synthesized from an arsenal of functional monomers directing self-assembly through packing frustration or response to various fields. The mobility in solution further allows the manipulation of self-assembly processes into specific directions by clever choice of environmental conditions. This review focuses on practical concepts that direct self-assembly into predictable nanostructures, while narrowing particle dispersity with respect to size, shape and internal morphology. The growing understanding of underlying self-assembly mechanisms expands the number of experimental concepts providing the means to target and manipulate progressively complex superstructures.
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Affiliation(s)
- André H Gröschel
- Molecular Materials, Department of Applied Physics, Aalto University School of Science, FIN-00076 Aalto, Espoo, Finland.
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18
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Sediq AS, Nejadnik MR, El Bialy I, Witkamp GJ, Jiskoot W. Protein–polyelectrolyte interactions: Monitoring particle formation and growth by nanoparticle tracking analysis and flow imaging microscopy. Eur J Pharm Biopharm 2015; 93:339-45. [DOI: 10.1016/j.ejpb.2015.04.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 03/24/2015] [Accepted: 04/22/2015] [Indexed: 11/24/2022]
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19
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Habicht A, Schmolke W, Goerigk G, Lange F, Saalwächter K, Ballauff M, Seiffert S. Critical fluctuations and static inhomogeneities in polymer gel volume phase transitions. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23743] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Axel Habicht
- Helmholtz-Zentrum Berlin; Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
- Freie Universität Berlin, Institute of Chemistry and Biochemistry; Takustr. 3 D-14195 Berlin Germany
| | - Willi Schmolke
- Helmholtz-Zentrum Berlin; Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
- Freie Universität Berlin, Institute of Chemistry and Biochemistry; Takustr. 3 D-14195 Berlin Germany
| | - Günter Goerigk
- Helmholtz-Zentrum Berlin; Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
- Humboldt-Universität zu Berlin; Department of Physics; Newtonstr. 15 D-12489 Berlin Germany
| | - Frank Lange
- Martin-Luther-Universität Halle-Wittenberg, Institute of Physics-NMR; Betty-Heimann-Str. 7 D-06120 Halle/Saale Germany
| | - Kay Saalwächter
- Martin-Luther-Universität Halle-Wittenberg, Institute of Physics-NMR; Betty-Heimann-Str. 7 D-06120 Halle/Saale Germany
| | - Matthias Ballauff
- Helmholtz-Zentrum Berlin; Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
- Humboldt-Universität zu Berlin; Department of Physics; Newtonstr. 15 D-12489 Berlin Germany
| | - Sebastian Seiffert
- Helmholtz-Zentrum Berlin; Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
- Freie Universität Berlin, Institute of Chemistry and Biochemistry; Takustr. 3 D-14195 Berlin Germany
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20
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Yan X, Kong J, Yang C, Fu G. Facile synthesis of hairy core–shell structured magnetic polymer submicrospheres and their adsorption of bovine serum albumin. J Colloid Interface Sci 2015; 445:9-15. [DOI: 10.1016/j.jcis.2014.12.022] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/14/2014] [Accepted: 12/16/2014] [Indexed: 12/26/2022]
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21
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Zhu ML, Li YL, Zhang ZM, Jiang Y. Preparation and properties of stretchable and tough alginate/polyacrylamide hollow capsules. RSC Adv 2015. [DOI: 10.1039/c5ra03465e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Stretchable and tough hollow capsules were synthesized using alginate and polyacrylamide and their volume could be expanded at least 27 times their original size.
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Affiliation(s)
- Ming-Lu Zhu
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing
- P. R. China
| | - Yan-Li Li
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing
- P. R. China
| | - Zi-Mou Zhang
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing
- P. R. China
| | - Yong Jiang
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing
- P. R. China
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22
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Krishnamoorthy M, Hakobyan S, Ramstedt M, Gautrot JE. Surface-initiated polymer brushes in the biomedical field: applications in membrane science, biosensing, cell culture, regenerative medicine and antibacterial coatings. Chem Rev 2014; 114:10976-1026. [PMID: 25353708 DOI: 10.1021/cr500252u] [Citation(s) in RCA: 384] [Impact Index Per Article: 38.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mahentha Krishnamoorthy
- Institute of Bioengineering and ‡School of Engineering and Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, United Kingdom
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23
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Habicht A, Schmolke W, Lange F, Saalwächter K, Seiffert S. The Non-effect of Polymer-Network Inhomogeneities in Microgel Volume Phase Transitions: Support for the Mean-Field Perspective. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400114] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Axel Habicht
- Freie Universität Berlin, Institute of Chemistry and Biochemistry; Takustr. 3 D-14195 Berlin Germany
- Helmholtz-Zentrum Berlin, F-ISFM Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
| | - Willi Schmolke
- Freie Universität Berlin, Institute of Chemistry and Biochemistry; Takustr. 3 D-14195 Berlin Germany
- Helmholtz-Zentrum Berlin, F-ISFM Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
| | - Frank Lange
- Martin-Luther-Universität Halle-Wittenberg, Institute of Physics - NMR; Betty-Heimann-Str., 7 D-06120 Halle/Saale Germany
| | - Kay Saalwächter
- Martin-Luther-Universität Halle-Wittenberg, Institute of Physics - NMR; Betty-Heimann-Str., 7 D-06120 Halle/Saale Germany
| | - Sebastian Seiffert
- Freie Universität Berlin, Institute of Chemistry and Biochemistry; Takustr. 3 D-14195 Berlin Germany
- Helmholtz-Zentrum Berlin, F-ISFM Soft Matter and Functional Materials; Hahn-Meitner-Platz 1 D-14109 Berlin Germany
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24
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Zhang M, Xiong Q, Wang Y, Zhang Z, Shen W, Liu L, Wang Q, Zhang Q. A well-defined coil–comb polycationic brush with “star polymers” as side chains for gene delivery. Polym Chem 2014. [DOI: 10.1039/c4py00311j] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The well-defined polycationic brush with super-high grafting density of PDMAEMA showed higher transfection capability than the single star polymer and PEI25K.
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Affiliation(s)
- Mingming Zhang
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192, P. R. China
| | - Qingqing Xiong
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192, P. R. China
| | - Yinsong Wang
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070, P. R. China
| | - Zhibao Zhang
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192, P. R. China
| | - Wei Shen
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192, P. R. China
| | - Lingrong Liu
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192, P. R. China
| | - Quanyao Wang
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070, P. R. China
| | - Qiqing Zhang
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192, P. R. China
- Institute of Biomedical and Pharmaceutical Technology
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25
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Kudina O, Zakharchenko A, Trotsenko O, Tokarev A, Ionov L, Stoychev G, Puretskiy N, Pryor SW, Voronov A, Minko S. Highly Efficient Phase Boundary Biocatalysis with Enzymogel Nanoparticles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306831] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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26
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Kudina O, Zakharchenko A, Trotsenko O, Tokarev A, Ionov L, Stoychev G, Puretskiy N, Pryor SW, Voronov A, Minko S. Highly Efficient Phase Boundary Biocatalysis with Enzymogel Nanoparticles. Angew Chem Int Ed Engl 2013; 53:483-7. [DOI: 10.1002/anie.201306831] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 10/03/2013] [Indexed: 11/06/2022]
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27
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Zhang Q, Liao Y, Bu W. Tunable interactions of polyoxometalate-based brushlike hybrids in solvents of variable quality: from self-recognition to supramolecular recognition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:10630-10634. [PMID: 23927082 DOI: 10.1021/la402491n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The controllable interactions of a spherical polymer brush modeled by a poly(styrene-b-4-vinylpyridinium methyl iodide)-polyoxometalate composite micelle, SVP-6, with a polyoxometalate-based supramolecular star polymer, PSP-4, in solvents of variable quality allow us to tune their self-assembly behaviors from self-recognition to supramolecular recognition. In the former case, isolated, contractive spheres together with a few vesicles formed by PSP-4 coexist with multimicelle aggregates formed by SVP-6, whereas SVP-6 is hosted inside the vesicle of PSP-4 in the latter case. This work represents an important step toward the development and understanding of programmable self-assembly of brushlike polymers into complex materials.
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Affiliation(s)
- Qian Zhang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000 PR China
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28
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29
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Zhang Q, Liao Y, He L, Bu W. Spherical polymer brushes in solvents of variable quality: an experimental insight by TEM imaging. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:4181-4186. [PMID: 23517447 DOI: 10.1021/la400016z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The spherical micelle and vesicle composed of [PW12O40](3-) and poly(styrene-b-4-vinylpyridinium methyl iodide) are regarded as a model system to study spherical polymer brushes (SPBs) in solvents of various quality. The pure repulsions occur for the brush chains in the chloroform solution and chloroform/methanol mixture with a methanol volume ratio of 9.1%, where the grafted polystyrene chains have a relatively extended conformation. Further increase in the methanol concentrations leads to the presence of the intra/inter-brush van der Waals attractions. Transmission electron microscopy studies show that there is a coexistence of isolated and oligomeric SPBs and multi-SPB aggregates (MSAs) with the methanol content from 17% to 23%. Only MSAs are detected with the increasing methanol content. Both the corona and core shrink significantly in the isolated and oligomeric SPBs and MSAs. The full interpenetration of the grafted chains is observed between the cores in the oligomeric SPBs and MSAs.
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Affiliation(s)
- Qian Zhang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou City, Gansu Province, China
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30
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Jusufi A, Borisov O, Ballauff M. Structure formation in polyelectrolytes induced by multivalent ions. POLYMER 2013. [DOI: 10.1016/j.polymer.2012.12.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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31
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Liras M, García O, Guarrotxena N, Palacios-Cuesta M, Quijada-Garrido I. Versatile thiolated thermosensitive polymers synthesized by ATRP of MEO2MA and AcSEMA, a new methacrylic monomer with a protected thiol group. Polym Chem 2013. [DOI: 10.1039/c3py00773a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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32
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Kaiser J, Szczerba W, Riesemeier H, Reinholz U, Radtke M, Albrecht M, Lu Y, Ballauff M. The structure of AuPd nanoalloys anchored on spherical polyelectrolyte brushes determined by X-ray absorption spectroscopy. Faraday Discuss 2013; 162:45-55. [DOI: 10.1039/c3fd20132e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Seiffert S. Microgel capsules tailored by droplet-based microfluidics. Chemphyschem 2012; 14:295-304. [PMID: 23225762 DOI: 10.1002/cphc.201200749] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Indexed: 12/14/2022]
Abstract
Microgel capsules are micrometer-sized particles that consist of a cross-linked, solvent-swollen polymer network complexed with additives. These particles have various applications, such as drug delivery, catalysis, and analytics. To optimize the performance of microgel capsules, it is crucial to control their size, shape, and content of encapsulated additives with high precision. There are two classes of microgel-capsule structures. One class comprises bulk microcapsules that consist of a polymer network spanning the entire particle and entrapping the additive within its meshes. The other class comprises core-shell structures; in this case, the microgel polymer network just forms the shell of the particles, whereas their interior is hollow and hosts the encapsulated payload. Both types of structures can be produced with exquisite control by droplet-based microfluidic templating followed by subsequent droplet gelation. This article highlights some early and recent achievements in the use of this technique to tailor soft microgel capsules; it also discusses applications of these particles. A special focus is on the encapsulation of living cells, which are very sensitive and complex but also very useful additives for immobilization within microgel particles.
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Affiliation(s)
- Sebastian Seiffert
- F-I2 Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, Germany.
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34
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Li G, Xu J, Zhao S, Zhu Y, Li L, Guo X. Spherical Polyelectrolyte Brushes on Colloidal Poly(butadiene) Particles. ACTA ACUST UNITED AC 2012. [DOI: 10.1524/zpch.2012.0264] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
A novel method to prepare spherical polyelectrolyte brushes (SPB) on the surface of colloidal poly(butadiene) (PB) core without having to use initiators with C=C double bond to attach covalently on the core surface was reported. Making use of the abundant double bonds in PB, spherical poly(acrylic acid) (PAA) bushes were grown from PB core surface by direct thermo-initiated emulsion polymerization using KPS as initiator. The thickness of SPB increased significantly upon increasing pH and decreasing the ionic strength. The grafting density of SPB with PB core was estimated from the relationship between the brush thickness and ionic strength based on the modified Daoud-Cotton model. The grafting density of SPB prepared by thermo-initiated emulsion polymerization (0.122 nm-2) is higher that that of SPB by photo-emulsion polymerization (0.105 nm-2). Using SPB with PB core as nanoreactors, nickel and silver nanoparticles were prepared by reduction of Ni
2+
and Ag
+
absorbed inside SPB as counterions. Relatively high catalytic activities for the reduction of p-nitrophenol by NaBH4 were observed for SPB immobilized Ni or Ag nanoparticles.
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Affiliation(s)
- Gongsheng Li
- East China University of Science and Technology, State Key Laboratory of Chemical Engineering, Shanghai, Volksrepublik China
| | - Jun Xu
- East China University of Science and Technology, State Key Laboratory of Chemical Engineering, Shanghai 200237, Volksrepublik China
| | - Shifang Zhao
- East China University of Science and Technology, State Key Laboratory of Chemical Engineering, Shanghai 200237, Volksrepublik China
| | - Yuanqing Zhu
- East China University of Science and Technology, State Key Laboratory of Chemical Engineering, Shanghai 200237, Volksrepublik China
| | - Li Li
- East China University of Science and Technology, State Key Laboratory of Chemical Engineering, Shanghai, Volksrepublik China
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35
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Hanske C, Erath J, Kühr C, Trebbin M, Schneider C, Wittemann A, Fery A. Adsorption of Spherical Polyelectrolyte Brushes: from Interactions to Surface Patterning. Z PHYS CHEM 2012. [DOI: 10.1524/zpch.2012.0265] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Adsorption of colloidal particles constitutes an attractive route to tailor the properties of surfaces. However, for efficient material design full control over the particle-substrate interactions is required. We investigate the interaction of spherical polyelectrolyte brushes (SPB) with charged substrates based on adsorption studies and atomic force spectroscopy. The brush layer grafted from the colloidal particles allows a precise adjustment of their adsorption behavior by varying the concentration of added salt. We find a pronounced selectivity between oppositely and like-charged surfaces for ionic strengths up to 10 mM. Near the transition from the osmotic to the salted brush regime at approximately 100 mM attractive secondary interactions become dominant. In this regime SPB adsorb even to like-charged surfaces. To determine the adhesion energy of SPB on charged surfaces directly, we synthesize micrometer-sized SPB. These particles are used in colloidal probe AFM studies. Measurements on oppositely charged surfaces show high forces of adhesion for low ionic strengths that can be attributed to an entropy gain by counterion release. Transferring our observations to charge patterned substrates, we are able to direct the deposition of SPB into two-dimensional arrays. Considering that numerous chemical modifications have been reported for SPB, our studies could open exiting avenues for the production of functional materials with a hierarchical internal organization.
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Affiliation(s)
- Christoph Hanske
- University of Bayreuth, Physical Chemistry II, Bayreuth, Deutschland
| | - Johann Erath
- University of Bayreuth, Physical Chemistry II, Bayreuth, Deutschland
| | - Christin Kühr
- University of Bayreuth, Physical Chemistry I, Bayreuth, Deutschland
| | - Martin Trebbin
- University of Bayreuth, Physical Chemistry I, Bayreuth, Deutschland
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36
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Matthias Ballauff at 60 – A personal tribute. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.06.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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37
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Wu S, Kaiser J, Drechsler M, Ballauff M, Lu Y. Thermosensitive Au-PNIPA yolk-shell particles as “nanoreactors” with tunable optical properties. Colloid Polym Sci 2012. [DOI: 10.1007/s00396-012-2736-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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38
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Zhao Q, Zhang P, Antonietti M, Yuan J. Poly(ionic liquid) Complex with Spontaneous Micro-/Mesoporosity: Template-Free Synthesis and Application as Catalyst Support. J Am Chem Soc 2012; 134:11852-5. [DOI: 10.1021/ja303552p] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Qiang Zhao
- Department of Colloid
Chemistry, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam,
Germany
| | - Pengfei Zhang
- Department of Colloid
Chemistry, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam,
Germany
| | - Markus Antonietti
- Department of Colloid
Chemistry, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam,
Germany
| | - Jiayin Yuan
- Department of Colloid
Chemistry, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam,
Germany
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39
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Hervés P, Pérez-Lorenzo M, Liz-Marzán LM, Dzubiella J, Lu Y, Ballauff M. Catalysis by metallic nanoparticles in aqueous solution: model reactions. Chem Soc Rev 2012; 41:5577-87. [PMID: 22648281 DOI: 10.1039/c2cs35029g] [Citation(s) in RCA: 652] [Impact Index Per Article: 54.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Catalysis by metallic nanoparticles is certainly among the most intensely studied problems in modern nanoscience. However, reliable tests for catalytic performance of such nanoparticles are often poorly defined, which makes comparison and benchmarking rather difficult. We tackle in this tutorial review a subset of well-studied reactions that take place in aqueous phase and for which a comprehensive kinetic analysis is available. Two of these catalytic model reactions are under consideration here, namely the reduction of (i) p-nitrophenol and (ii) hexacyanoferrate (iii), both by borohydride ions. Both reactions take place at the surface of noble metal nanoparticles at room temperature and can be accurately monitored by UV-vis spectroscopy. Moreover, the total surface area of the nanoparticles in solution can be known with high precision and thus can be directly used for the kinetic analysis. Hence, these model reactions represent cases of heterogeneous catalysis that can be modelled with the accuracy typically available for homogeneous catalysis. Both model reactions allow us to discuss a number of important concepts and questions, namely the dependence of catalytic activity on the size of the nanoparticles, electrochemistry of nanoparticles, surface restructuring, the use of carrier systems and the role of diffusion control.
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Affiliation(s)
- Pablo Hervés
- Departamento de Química Física, Universidade de Vigo, 36310, Vigo, Spain
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40
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Azzaroni O. Polymer brushes here, there, and everywhere: Recent advances in their practical applications and emerging opportunities in multiple research fields. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26119] [Citation(s) in RCA: 306] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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41
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Seiffert S. Non-Spherical Soft Supraparticles from Microgel Building Blocks. Macromol Rapid Commun 2012; 33:1286-93. [DOI: 10.1002/marc.201200175] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 04/05/2012] [Indexed: 11/10/2022]
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42
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Polzer F, Wunder S, Lu Y, Ballauff M. Oxidation of an organic dye catalyzed by MnOx nanoparticles. J Catal 2012. [DOI: 10.1016/j.jcat.2012.01.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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43
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Seiffert S. Impact of polymer network inhomogeneities on the volume phase transition of thermoresponsive microgels. Macromol Rapid Commun 2012; 33:1135-42. [PMID: 22492536 DOI: 10.1002/marc.201200138] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Indexed: 11/06/2022]
Abstract
Thermoresponsive polymer gels exhibit pronounced swelling and deswelling upon changes in temperature, rendering them attractive for various applications. This transition has been studied extensively, but only little is known about how it is affected by nano- and micrometer-scale inhomogeneities in the polymer gel network. In this work, droplet microfluidics is used to fabricate microgel particles of strongly varying inner homogeneity to study their volume phase behavior. These particles exhibit very similar equilibrium swelling and deswelling independent of their inner inhomogeneity, but the kinetics of their volume phase transition is markedly different: while gels with pronounced micrometer-scale inhomogeneity show fast and affine deswelling, homogeneous gels shrink slowly and in multiple steps.
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Affiliation(s)
- Sebastian Seiffert
- Helmholtz-Zentrum Berlin, F-I2 Soft Matter and Functional Materials, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany.
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44
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Becker AL, Henzler K, Welsch N, Ballauff M, Borisov O. Proteins and polyelectrolytes: A charged relationship. Curr Opin Colloid Interface Sci 2012. [DOI: 10.1016/j.cocis.2011.10.001] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Polypyrrole–palladium nanoparticles composite as efficient catalyst for Suzuki–Miyaura coupling. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2011.11.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Roiter Y, Minko I, Nykypanchuk D, Tokarev I, Minko S. Mechanism of nanoparticle actuation by responsive polymer brushes: from reconfigurable composite surfaces to plasmonic effects. NANOSCALE 2012; 4:284-292. [PMID: 22081128 DOI: 10.1039/c1nr10932d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The mechanism of nanoparticle actuation by stimuli-responsive polymer brushes triggered by changes in the solution pH was discovered and investigated in detail in this study. The finding explains the high spectral sensitivity of the composite ultrathin film composed of a poly(2-vinylpyridine) (P2VP) brush that tunes the spacing between two kinds of nanoparticles-gold nanoislands immobilized on a transparent support and gold colloidal particles adsorbed on the brush. The optical response of the film relies on the phenomenon of localized surface plasmon resonances in the noble metal nanoparticles, giving rise to an extinction band in visible spectra, and a plasmon coupling between the particles and the islands that has a strong effect on the band position and intensity. Since the coupling is controlled by the interparticle spacing, the pH-triggered swelling-shrinking transition in the P2VP brush leads to pronounced changes in the transmission spectra of the hybrid film. It was not established in the previous publications how the actuation of gold nanoparticles within a 10-15 nm interparticle distance could result in the 50-60 nm shift in the absorbance maximum in contrast to the model experiments and theoretical estimations of several nanometer shifts. In this work, the extinction band was deconvoluted into four spectrally separated and overlapping contributions that were attributed to different modes of interactions between the particles and the islands. These modes came into existence due to variations in the thickness of the grafted polymeric layer on the profiled surface of the islands. In situ atomic force microscopy measurements allowed us to explore the behavior of the Au particles as the P2VP brush switched between the swollen and collapsed states. In particular, we identified an interesting, previously unanticipated regime when a particle position in a polymer brush was switched between two distinct states: the particle exposed to the surface of the collapsed layer and the particle engulfed by the swollen brush. On average, the characteristic distance between the particles and the islands increased upon the brush swelling. The observed behavior was a result of the anchoring of the particles to polymeric chains that limited the particles' vertical motion range. The experimental findings will be used to design highly sensitive optical nanosensors based on a polymer-brush-modulated interparticle plasmon coupling.
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Affiliation(s)
- Yuri Roiter
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York 13699-5810, USA
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Hanske C, Schneider C, Drechsler M, Wittemann A, Fery A. Salt-regulated attraction and repulsion of spherical polyelectrolyte brushes towards polyelectrolyte multilayers. Phys Chem Chem Phys 2012; 14:4196-203. [DOI: 10.1039/c2cp23408d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kaiser J, Leppert L, Welz H, Polzer F, Wunder S, Wanderka N, Albrecht M, Lunkenbein T, Breu J, Kümmel S, Lu Y, Ballauff M. Catalytic activity of nanoalloys from gold and palladium. Phys Chem Chem Phys 2012; 14:6487-95. [DOI: 10.1039/c2cp23974d] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yuan J, Wunder S, Warmuth F, Lu Y. Spherical polymer brushes with vinylimidazolium-type poly(ionic liquid) chains as support for metallic nanoparticles. POLYMER 2012. [DOI: 10.1016/j.polymer.2011.11.031] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kijima T, Javakhishvili I, Jankova K, Hvilsted S, Kodama S, Sugiya M, Sawada H. Controlled immobilization of palladium nanoparticles in two different fluorinated polymeric aggregate cores and their application in catalysis. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2567-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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