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Li J, Parakhonskiy BV, Skirtach AG. A decade of developing applications exploiting the properties of polyelectrolyte multilayer capsules. Chem Commun (Camb) 2023; 59:807-835. [PMID: 36472384 DOI: 10.1039/d2cc04806j] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Transferring the layer-by-layer (LbL) coating approach from planar surfaces to spherical templates and subsequently dissolving these templates leads to the fabrication of polyelectrolyte multilayer capsules. The versatility of the coatings of capsules and their flexibility upon bringing in virtually any material into the coatings has quickly drawn substantial attention. Here, we provide an overview of the main developments in this field, highlighting the trends in the last decade. In the beginning, various methods of encapsulation and release are discussed followed by a broad range of applications, which were developed and explored. We also outline the current trends, where the range of applications is continuing to grow, including addition of whole new and different application areas.
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Affiliation(s)
- Jie Li
- Nano-Biotechnology Laboratory, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
| | - Bogdan V Parakhonskiy
- Nano-Biotechnology Laboratory, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
| | - Andre G Skirtach
- Nano-Biotechnology Laboratory, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
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2
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Musin EV, Kim AL, Dubrovskii AV, Tikhonenko SA. New sight at the organization of layers of multilayer polyelectrolyte microcapsules. Sci Rep 2021; 11:14040. [PMID: 34234247 PMCID: PMC8263573 DOI: 10.1038/s41598-021-93565-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 06/22/2021] [Indexed: 11/08/2022] Open
Abstract
In this work, the mutual arrangement of polyelectrolytes of multilayer polyelectrolyte microcapsules (with layers-[PAH/PSS]3PAH) by determination of the dissociation level of polyallylamine (PAH) from the surface of a polyelectrolyte microcapsules (PMC) of various types was studied: PMC with a dissolved CaCO3 core after preparation, PMC with an undissolved CaCO3 core and PMC with an encapsulated protein. It was concluded that the polyelectrolyte layers are mixed in the entire shell of the capsules with a dissolved CaCO3 core. In the case of the PMC with an undissolved CaCO3 core, such mixing of polyelectrolyte layers does not occur. That fact allows us to conclude that the mixing of polyelectrolytes layers mixing at the stage of dissolution of CaCO3 core. The PMC with encapsulated protein has partial mixing of polyelectrolytes layers. That phenomenon may be due to the fact that seven-layered protein-containing microcapsules already have a dense and well-formed shell. The obtained data correlate with the data on the study of the surface charge of microcapsules.
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Affiliation(s)
- Egor V Musin
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Science, Institutskaya St., 3, Puschino, 142290, Moscow Region, Russia
| | - Aleksandr L Kim
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Science, Institutskaya St., 3, Puschino, 142290, Moscow Region, Russia
| | - Alexey V Dubrovskii
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Science, Institutskaya St., 3, Puschino, 142290, Moscow Region, Russia
| | - Sergey A Tikhonenko
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Science, Institutskaya St., 3, Puschino, 142290, Moscow Region, Russia.
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Spiridonov V, Liu X, Zezin S, Panova I, Sybachin A, Yaroslavov A. Hybrid nanocomposites of carboxymethyl cellulose cross-linked by in-situ formed Cu2O nanoparticles for photocatalytic applications. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121180] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Destruction of Polyelectrolyte Microcapsules Formed on CaCO 3 Microparticles and the Release of a Protein Included by the Adsorption Method. Polymers (Basel) 2020; 12:polym12030520. [PMID: 32121491 PMCID: PMC7182804 DOI: 10.3390/polym12030520] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/21/2020] [Accepted: 02/21/2020] [Indexed: 11/17/2022] Open
Abstract
The degradation of polyelectrolyte microcapsules formed on protein-free CaCO3 particles consisting of polyallylamine (PAH) and polystyrene sulfonate (PSS) and the resulting yield of protein in the presence of various salts of different concentrations, as well as at two pH values, was studied by fluorescence spectroscopy; the protein was incorporated into prepared microcapsules by adsorption. It was found that a high concentration of sodium chloride (2 M) leads to considerable dissociation of PAH, which is apparently due to the loosening of polyelectrolytes under the action of ionic strength. At the same time, 0.2 M sodium chloride and ammonium sulfate of the same ionic strength (0.1 M) exert less influence on the amount of dissociated polymer. In the case of ammonium sulfate (0.1 M), the effect is due to the competitive binding of sulfate anions to the amino groups of the polyelectrolyte. However, unlike microcapsules formed on CaCO3 particles containing protein, the dissociation of polyelectrolyte from microcapsules formed on protein-free particles increased with increasing temperature. Apparently, a similar effect is associated with the absence of a distinct shell, which was observed on microcapsules formed on protein-containing CaCO3 particles. The high level of the presence of Fluorescein isothiocyanate (FITC)-labeled Bovine Serum Albumin (BSA) in the supernatant is explained by the large amount of electrostatically bound protein and the absence of a shell that prevents the release of the protein from the microcapsules. In 2M NaCl, during the observation period, the amount of the released protein did not exceed 70% of the total protein content in the capsules, in control samples, this value does not exceed 8%, which indicates the predominantly electrostatic nature of protein retention in capsules formed on protein-free CaCO3 particles. The increase in protein yield and peeling of PAH with increasing pH is explained by the proximity of pH 7 to the point of charge exchange of the amino group of polyelectrolyte, as a result of the dissociation of the microcapsule.
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Dubrovskii AV, Kochetkova OY, Kim AL, Musin EV, Seraya OY, Tikhonenko SA. Destruction of shells and release of a protein from microcapsules consisting of non-biodegradable polyelectrolytes. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2018.1429436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Alexey V. Dubrovskii
- Russian Academy of Science, Institute of Theoretical and Experimental Biophysics, Puschino, Moscow Reg., Russian Federation
| | - Olga Yu. Kochetkova
- Russian Academy of Science, Institute of Theoretical and Experimental Biophysics, Puschino, Moscow Reg., Russian Federation
| | - Aleksandr L. Kim
- Russian Academy of Science, Institute of Theoretical and Experimental Biophysics, Puschino, Moscow Reg., Russian Federation
- Lomonosov Moscow State University, Moscow, Russian Federation
| | - Egor V. Musin
- Russian Academy of Science, Institute of Theoretical and Experimental Biophysics, Puschino, Moscow Reg., Russian Federation
- Lomonosov Moscow State University, Moscow, Russian Federation
| | - Olga Yu. Seraya
- Russian Academy of Science, Institute of Theoretical and Experimental Biophysics, Puschino, Moscow Reg., Russian Federation
| | - Sergey A. Tikhonenko
- Russian Academy of Science, Institute of Theoretical and Experimental Biophysics, Puschino, Moscow Reg., Russian Federation
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Abstract
Catalysis is at the base of a series of biological and technological application processes. In recent years, the tendency has developed to carry out catalyzed reactions within confined structures, thus forming systems called micro or nanoreactors. Compartmentalized structures are cavities delimited by a wall where specific functions are introduced with a defined concentration and in the desired sites. These containers are generally referred to as nano or microcapsules, assuming the function of reactors in the presence of chemical reactions. Among the various types of existing structures, one of the most interesting is represented by systems made with polymers. This review aims to highlight some of the current advances in the use of functionalized structures that are useful for catalysis reactions, paying particular attention to polymer capsules and enzymes. The built-up methods used for the production of polymer capsules, as well as the aspects that influence membrane permeability and reactivity to environmental conditions, are discussed. Recent advances on biocatalysis confined in polymeric capsules are illustrated, and the strengths and weaknesses of the principal nanoreactors are considered.
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Moore DG, Brignoli JVA, Rühs PA, Studart AR. Functional Microcapsules with Hybrid Shells Made via Sol-Gel Reaction within Double Emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9007-9017. [PMID: 28813598 DOI: 10.1021/acs.langmuir.7b01503] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Microcapsules with organic-inorganic hybrid shells can be used as functionally responsive delivery systems that are attractive for a broad range of applications. Hybrid-shell microcapsules have often been synthesized by the assembly of solid inorganic nanoparticles and polymers. Efforts to extend this approach to microfluidic emulsification have been hampered by problems with clogging and flow instabilities when utilizing dispersions of solid particles. In this work, hybrid shell microcapsules are synthesized through the reaction of liquid precursors, eliminating the use of solid dispersions. Our microfluidic water-oil-water emulsification technique also enables the preparation of hybrid-shell microcapsules with thicker and more robust shells compared to alternative techniques. By utilizing bridged-silane precursors to form the hybrid material, we demonstrate hybrid-shell microcapsules with independently tunable functional and mechanical/barrier properties. This independent tuning of physical and functional properties allows for the production of functional organic-inorganic hybrid shell microcapsules that can be tailored to meet the demands of a wide range of applications.
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Affiliation(s)
- David G Moore
- Complex Materials, Department of Materials, ETH Zürich , 8093 Zürich, Switzerland
| | | | - Patrick A Rühs
- Complex Materials, Department of Materials, ETH Zürich , 8093 Zürich, Switzerland
| | - André R Studart
- Complex Materials, Department of Materials, ETH Zürich , 8093 Zürich, Switzerland
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Demina PA, Grigoriev DO, Kuz’micheva GM, Bukreeva TV. Preparation of pickering-emulsion-based capsules with shells composed of titanium dioxide nanoparticles and polyelectrolyte layers. COLLOID JOURNAL 2017. [DOI: 10.1134/s1061933x1702003x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Gao H, Goriacheva OA, Tarakina NV, Sukhorukov GB. Intracellularly Biodegradable Polyelectrolyte/Silica Composite Microcapsules as Carriers for Small Molecules. ACS APPLIED MATERIALS & INTERFACES 2016; 8:9651-9661. [PMID: 27008032 DOI: 10.1021/acsami.6b01921] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Microcapsules that can be efficiently loaded with small molecules and effectively released at the target area through the degradation of the capsule shells hold great potential for treating diseases. Traditional biodegradable polyelectrolyte (PE) capsules can be degraded by cells and eliminated from the body but fail to encapsulate drugs with small molecular weight. Here, we report a poly-l-arginine hydrochloride (PARG)/dextran sulfate sodium salt (DEXS)/silica (SiO2) composite capsule that can be destructed in cells and of which the in situ formed inorganic SiO2 enables loading of small model molecules, Rhodamine B (Rh-B). The composite capsules were fabricated based on the layer-by-layer (LbL) technique and the hydrolysis of tetraethoxysilane (TEOS). Capsules composed of nondegradable PEs and SiO2, polyllamine hydrochloride (PAH)/poly(sodium 4-styrenesulfonate) (PSS)/silica (the control sample), were prepared and briefly compared with the degradable composite capsules. An intracellular degradation study of both types of composite capsules revealed that PARG/DEXS/silica capsules were degraded into fragments and lead to the release of model molecules in a relatively short time (2 h), while the structure of PAH/PSS/silica capsules remained intact even after 3 days incubation with B50 cells. Such results indicated that the polymer components played a significant role in the degradability of the SiO2. Specifically, PAH/PSS scaffolds blocked the degradation of SiO2. For PARG/DEXS/silica capsules, we proposed the effects of both hydrolytic degradation of amorphous silica and enzymatic degradation of PARG/DEXS polymers as a cell degradation mechanism. All the results demonstrated a new type of functional composite microcapsule with low permeability, good biocompatibility, and biodegradability for potential medical applications.
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Affiliation(s)
- Hui Gao
- School of Engineering and Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, United Kingdom
| | - Olga A Goriacheva
- Saratov State University , 83 Astrakhanskaya Street, Saratov 410012, Russia
| | - Nadezda V Tarakina
- School of Engineering and Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, United Kingdom
| | - Gleb B Sukhorukov
- School of Engineering and Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, United Kingdom
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10
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Gao H, Wen D, Tarakina NV, Liang J, Bushby AJ, Sukhorukov GB. Bifunctional ultraviolet/ultrasound responsive composite TiO2/polyelectrolyte microcapsules. NANOSCALE 2016; 8:5170-80. [PMID: 26878702 DOI: 10.1039/c5nr06666b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Designing and fabricating multifunctional microcapsules are of considerable interest in both academic and industrial research aspects. This work reports an innovative approach to fabricate composite capsules with high UV and ultrasound responsive functionalities that can be used as external triggers for controlled release, yet with enhanced mechanical strength that can make them survive in a harsh environment. Needle-like TiO2 nanoparticles (NPs) were produced in situ into layer-by-layer (LbL) polyelectrolyte (PE) shells through the hydrolysis of titanium butoxide (TIBO). These rigid TiO2 NPs yielded the formed capsules with excellent mechanical strength, showing a free standing structure. A possible mechanism is proposed for the special morphology formation of the TiO2 NPs and their reinforcing effects. Synergistically, their response to UV and ultrasound was visualized via SEM, with the results showing an irreversible shell rapture upon exposure to either UV or ultrasound irradiation. As expected, the release studies revealed that the dextran release from the TiO2/PE capsules was both UV-dependent and ultrasound-dependent. Besides, the biocompatibility of the capsules with the incorporation of amorphous TiO2 NPs was confirmed by an MTT assay experiment. All these pieces of evidence suggested a considerable potential medicinal application of TiO2/PE capsules for controlled drug delivery.
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Affiliation(s)
- Hui Gao
- The School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.
| | - Dongsheng Wen
- Institute of Particle Science and Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - Nadezda V Tarakina
- The School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.
| | - Jierong Liang
- The School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.
| | - Andy J Bushby
- The School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.
| | - Gleb B Sukhorukov
- The School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.
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11
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Timin AS, Muslimov AR, Lepik KV, Saprykina NN, Sergeev VS, Afanasyev BV, Vilesov AD, Sukhorukov GB. Triple-responsive inorganic–organic hybrid microcapsules as a biocompatible smart platform for the delivery of small molecules. J Mater Chem B 2016; 4:7270-7282. [DOI: 10.1039/c6tb02289h] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We designed novel hybrid inorganic/organic capsules with unique physicochemical features enabling multimodal triggering.
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Affiliation(s)
| | - Albert R. Muslimov
- First I. P. Pavlov State Medical University of St. Petersburg
- Lev Tolstoy str
- 6/8
- Saint-Petersburg
- Russian Federation
| | - Kirill V. Lepik
- First I. P. Pavlov State Medical University of St. Petersburg
- Lev Tolstoy str
- 6/8
- Saint-Petersburg
- Russian Federation
| | - Natalia N. Saprykina
- Institution of Russian Academy of Sciences Institute of Macromolecular Compounds Russian Academy of Sciences (IMC RAS)
- Bolshoy Prosp
- 31
- Saint-Petersburg
- Russian Federation
| | - Vladislav S. Sergeev
- First I. P. Pavlov State Medical University of St. Petersburg
- Lev Tolstoy str
- 6/8
- Saint-Petersburg
- Russian Federation
| | - Boris V. Afanasyev
- First I. P. Pavlov State Medical University of St. Petersburg
- Lev Tolstoy str
- 6/8
- Saint-Petersburg
- Russian Federation
| | - Alexander D. Vilesov
- Institution of Russian Academy of Sciences Institute of Macromolecular Compounds Russian Academy of Sciences (IMC RAS)
- Bolshoy Prosp
- 31
- Saint-Petersburg
- Russian Federation
| | - Gleb B. Sukhorukov
- RASA Center in Tomsk
- Tomsk Polytechnic University
- Tomsk
- Russian Federation
- RASA Center in St. Petersburg
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12
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Hussain SZ, Zyuzin MV, Hussain I, Parak WJ, Carregal-Romero S. Catalysis by multifunctional polyelectrolyte capsules. RSC Adv 2016. [DOI: 10.1039/c6ra08171a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Gold and iron oxide modified polyelectrolyte capsules have been used as multifunctional platforms for catalysis and magnetic separation. Gold nanoparticle size and shell composition had an influence on their catalytic activity.
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Affiliation(s)
- Syed Zajif Hussain
- Department of Chemistry
- SBA School of Science and Engineering (SBASSE)
- Lahore University of Management Sciences (LUMS)
- Lahore
- Pakistan
| | | | - Irshad Hussain
- Department of Chemistry
- SBA School of Science and Engineering (SBASSE)
- Lahore University of Management Sciences (LUMS)
- Lahore
- Pakistan
| | - Wolfgang J. Parak
- Fachbereich Physik
- Philipps Universität Marburg
- Marburg
- Germany
- CIC BiomaGUNE
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Peterson AM, Pilz-Allen C, Kolesnikova T, Möhwald H, Shchukin D. Growth factor release from polyelectrolyte-coated titanium for implant applications. ACS APPLIED MATERIALS & INTERFACES 2014; 6:1866-1871. [PMID: 24325402 DOI: 10.1021/am404849y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polyelectrolyte multilayer coatings based on poly(methacrylic acid) and poly-l-histidine were formed on anodized titanium surfaces with adsorbed bone morphogenetic protein 2 (BMP-2) or basic fibroblast growth factor (FGFb). These coatings are proposed for use on titanium implanted devices. Coatings were capable of sustained release of growth factor over 25 days, with BMP-2 and FGFb exhibiting approximately identical release profiles. Cell culture on growth factor-eluting surfaces was more effective for preosteoblasts on BMP-2-eluting surfaces than for fibroblasts on FGFb-eluting surfaces. Cell counts at all time points on BMP-2-eluting surfaces were significantly higher than for those on anodized titanium or polyelectrolyte surfaces that did not contain BMP-2. Alkaline phosphatase levels were significantly higher after 21 days on BMP-2-eluting surfaces, indicating increased bone growth.
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Affiliation(s)
- Amy M Peterson
- Interfaces Department, Max Planck Institute of Colloids and Interfaces , Am Mühlenberg 1, 14476 Potsdam, Germany
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Peterson AM, Pilz-Allen C, Möhwald H, Shchukin DG. Evaluation of the role of polyelectrolyte deposition conditions in growth factor release. J Mater Chem B 2014; 2:2680-2687. [DOI: 10.1039/c3tb21757d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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15
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Structural and Opto-electronic Study of a Novel Nanostructure Nb–S Co-doped Titania. J Inorg Organomet Polym Mater 2012. [DOI: 10.1007/s10904-012-9740-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Dontsova D, Keller V, Keller N, Steffanut P, Félix O, Decher G. Photocatalytically Active Polyelectrolyte/Nanoparticle Films for the Elimination of a Model Odorous Gas. Macromol Rapid Commun 2011; 32:1145-9. [DOI: 10.1002/marc.201100192] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Revised: 05/04/2011] [Indexed: 11/12/2022]
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Bédard MF, De Geest BG, Skirtach AG, Möhwald H, Sukhorukov GB. Polymeric microcapsules with light responsive properties for encapsulation and release. Adv Colloid Interface Sci 2010; 158:2-14. [PMID: 19720369 DOI: 10.1016/j.cis.2009.07.007] [Citation(s) in RCA: 166] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Revised: 06/09/2009] [Accepted: 07/18/2009] [Indexed: 11/24/2022]
Abstract
This review is dedicated to recent developments on the topic of light sensitive polymer-based microcapsules. The microcapsules discussed are constructed using the layer-by-layer self-assembly method, which consists in absorbing oppositely charged polyelectrolytes onto charged sacrificial particles. Microcapsules display a broad spectrum of qualities over other existing microdelivery systems such as high stability, longevity, versatile construction and a variety of methods to encapsulate and release substances. Release and encapsulation of materials by light is a particularly interesting topic. Microcapsules can be made sensitive to light by incorporation of light sensitive polymers, functional dyes and metal nanoparticles. Optically active substances can be inserted into the shell during their assembly as a polymer complex or following the shell preparation. Ultraviolet-addressable microcapsules were shown to allow for remote encapsulation and release of materials. Visible- and infrared- addressable microcapsules offer a large array of release strategies for capsules, from destructive to highly sensitive reversible approaches. Besides the Introduction and Conclusions, this review contains in four sections reviewing the effects of light 1) on polymer-based microcapsules, 2) microcapsules containing metal nanoparticles and 3) functional dyes, as well as a fourth section that revisits the implications of light addressable polymeric microcapsules as a microdelivery system for biological applications.
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Chung KH, Jung HY, Lee YW, Lee KY. Preparation of TiO2-loaded nanocapsules and their sun protection behaviors. J IND ENG CHEM 2010. [DOI: 10.1016/j.jiec.2010.01.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Guzhvina DV, Dubrovsky AV, Shabarchina LI, Sukhorukov BI. Investigation of the influence of temperature on polyelectrolyte microcapsules containing and not containing proteins. Biophysics (Nagoya-shi) 2010. [DOI: 10.1134/s0006350910010082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Cui J, Fan D, Hao J. Magnetic {Mo72Fe30}-embedded hybrid nanocapsules. J Colloid Interface Sci 2009; 330:488-92. [DOI: 10.1016/j.jcis.2008.10.075] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2008] [Revised: 09/29/2008] [Accepted: 10/11/2008] [Indexed: 10/21/2022]
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21
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Lv H, Lin Q, Zhang K, Yu K, Yao T, Zhang X, Zhang J, Yang B. Facile fabrication of monodisperse polymer hollow spheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:13736-13741. [PMID: 18954151 DOI: 10.1021/la802782w] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This article reports the facile synthesis of monodisperse polymer hollow spheres by seeded emulsion polymerization without additional treatment. In this method, P(St-MMA-MAA) copolymer latex particles were first prepared by emulsifier-free emulsion polymerization and then used as seeds to carry out emulsion polymerization of methyl methacrylate (MMA), divinyl benzene (DVB), and 2-hydroxyethyl methacrylate (HEMA) with potassium persulfate (KPS) as initiator at 80 degrees C. The void of hollow spheres was readily adjusted by changing the monomer/seed weight ratio, and it could be enlarged while the diameters of hollow spheres changed little after etching by dimethyl formamide (DMF). The effects of synthetic parameters including the monomer composition and the properties of seeds on the morphology of hollow spheres were investigated in detail. On the basis of the experimental results, it seemed reasonable to conclude that the formation of hollow spheres was due to the "dissolution" of seeds in monomers and phase separation between the constituent polymers. As a thermodynamic factor, sodium dodecyl sulfate (SDS) would allow the preparation of solid particles depending on its level.
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Affiliation(s)
- Hui Lv
- State Key Laboratory for Supramolecular Structure & Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
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Grigoriev DO, Möhwald H, Shchukin DG. Theoretical evaluation of nano- or microparticulate contact angle at fluid/fluid interfaces: analysis of the excluded area behavior upon compression. Phys Chem Chem Phys 2008; 10:1975-82. [PMID: 18368189 DOI: 10.1039/b719140e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel method for the determination of the particle contact angle at the liquid/gas or liquid/liquid interface based on the excluded area concept revealed, in spite of its simplicity, some serious difficulties connected with the exact quantitative particle deposition at the interface and with changes in the particulate contact angle upon binary monolayer compression. The comprehensive theoretical consideration of the contact angle behavior made for such a system allowed considerable improvements: firstly, the prediction of direction of the particles' displacement at surface pressure increase is now possible and hence an unambiguous identification of particle hydrophobicity can be done. Secondly, the analytical relation describing the dependence of the particulate contact angle on the surface tension (surface pressure) was derived, allowing the prediction of whether or not particles of a given hydrophobicity will be expelled from the monolayer at certain surface pressure and of the area relinquished by the displaced particles. Thirdly, the transformation of this relation upon taking into consideration the initial conditions led to a linear dependence between excluded area and normalized surface tension allowing the determination of the particle contact angle and the exact number of deposited particles simultaneously and independently of each other. Finally, the application of the improved approach to the previously collected experimental data yielded reasonable values for both particle contact angle and number of deposited particles.
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Affiliation(s)
- D O Grigoriev
- Max-Planck Institute of Colloids and Interfaces, Golm/Potsdam, D-14476, Germany.
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Coyle EE, Oelgemöller M. Micro-photochemistry: photochemistry in microstructured reactors. The new photochemistry of the future? Photochem Photobiol Sci 2008; 7:1313-22. [DOI: 10.1039/b808778d] [Citation(s) in RCA: 202] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Byk T, Sokolov V, Gaevskaya T, Skorb E, Sviridov D, Noh CH, Song KY, Kwon YN, Cho SH. Photochemical selective deposition of nickel using a TiO2–Pd2+ layer. J Photochem Photobiol A Chem 2008. [DOI: 10.1016/j.jphotochem.2007.06.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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25
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Photochemical Deposition of Ni–Cu Patterns onto Conducting Substrates Employing TiO[sub 2]–Pd[sup 2+] Layers. ACTA ACUST UNITED AC 2007. [DOI: 10.1149/1.2718394] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Dubrovskii AV, Shabarchina LI, Kim YA, Sukhorukov BI. Influence of the temperature on polyelectrolyte microcapsules: Light scattering and confocal microscopy data. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2006. [DOI: 10.1134/s0036024406100281] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Gao L, Wang E, Kang Z, Song Y, Mao B, Xu L. Layer-by-Layer Assembly of Polyoxometalates into Microcapsules. J Phys Chem B 2005; 109:16587-92. [PMID: 16853110 DOI: 10.1021/jp051818f] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The polyoxometalate (POM) chemistry world has been experiencing an unparalleled development of rapid synthesis of new compounds and slow development of POM-based functional materials and devices. Meanwhile, researchers in the microcapsule world, encouraged by the introduction of the layer-by-layer method, are pursuing good components for constructing functional capsule devices. Here, in view of the versatile properties that POM-based microcapsules may possess, various types of POM-polyelectrolyte composite microcapsules were constructed using the layer-by-layer method. Microscopy reveals that polyoxometalates form nanoparticles on the shell in the presence of cationic polyelectrolytes. These nanoparticles connected with polyelectrolytes constitute the shell and support the microcapsule from collapse after drying, and this is an interesting characteristic different from those of common composite and polyelectrolyte capsules. Fourier transform infrared (FTIR), UV-vis absorption, and X-ray photoelectron spectroscopy (XPS) were used to examine the properties of the POMs in the microcapsules. The obtained microcapsules exhibit higher thermal stability than polyelectrolyte microcapsules. Furthermore, the functions of POMs were maintained when they were assembled into microcapsules. It is proved that microcapsules bearing POMs with redox activity can provide a reduction environment, which can lead to the realization of in situ synthesis of materials, and that microcapsules with photoluminescent POMs as a component can also have a photoluminescent property, providing a way to develop functional capsule devices. This work may provide an opportunity to enrich both the polyoxometalate chemistry and the capsule field.
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Affiliation(s)
- Lei Gao
- Polyoxometalate Institute, Chemistry Department, Northeast Normal University, Changchun, Jilin, People's Republic of China 130024
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28
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Shchukin DG, Möhwald H. Urea photosynthesis inside polyelectrolyte capsules: effect of confined media. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:5582-7. [PMID: 15924493 DOI: 10.1021/la050429+] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The influence of the restricted volume of poly(styrene sulfonate)/poly(allylamine hydrochloride) capsules of different size (2.2, 4.2, and 8.1 microm) on the TiO2-assisted photosynthesis of urea from inorganic precursors (CO2 and NO(3-)) in aqueous solution was demonstrated. Poly(vinyl alcohol) was employed as electron donor to facilitate the photosynthetic process. Decreasing the size of the confined microvolume of polyelectrolyte capsules accelerates the NO(3-) photoreduction, which is a limiting stage of the urea photosynthesis and, correspondingly, increases the efficiency of urea production. The highest yield of urea photosynthesis (37%) was achieved for Cu-modified TiO2 nanoparticles encapsulated inside 2.2 microm poly(styrene sulfonate)/poly(allylamine hydrochloride) capsules.
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Affiliation(s)
- Dmitry G Shchukin
- Max-Planck Institute of Colloids and Interfaces, D14424 Potsdam, Germany.
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