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Pageni P, Yang P, Bam M, Zhu T, Chen YP, Decho AW, Nagarkatti M, Tang C. Recyclable magnetic nanoparticles grafted with antimicrobial metallopolymer-antibiotic bioconjugates. Biomaterials 2018; 178:363-372. [PMID: 29759729 DOI: 10.1016/j.biomaterials.2018.05.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 04/12/2018] [Accepted: 05/03/2018] [Indexed: 11/16/2022]
Abstract
Over-prescription and improper use of antibiotics has led to the emergence of bacterial resistance, posing a major threat to public health. There has been significant interest in the development of alternative therapies and agents to combat antibiotic resistance. We report the preparation of recyclable magnetic iron oxide nanoparticles grafted with charged cobaltocenium-containing metallopolymers by surface-initiated reversible addition-fragmentation chain transfer (RAFT) polymerization. β-Lactam antibiotics were then conjugated with metallopolymers to enhance their vitality against both Gram-positive and Gram-negative bacteria. The enhanced antibacterial activity was a result of synergy of antimicrobial segments that facilitate the inhibition of hydrolysis of antibiotics and local enhancement of antibiotic concentration on a nanoparticle surface. These magnetic nanoparticles can be recycled numerous times without losing the initial antimicrobial potency. Studies suggested negligible toxicity of metallopolymer-grafted nanoparticles to red blood cells and minimal tendency to induce resistance in bacteria.
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Affiliation(s)
- Parasmani Pageni
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States
| | - Peng Yang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States
| | - Marpe Bam
- Department of Pathology, Microbiology and Immunology, University of South Carolina, School of Medicine, Columbia, SC 29209, United States
| | - Tianyu Zhu
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States
| | - Yung Pin Chen
- Department of Environmental Health Sciences, University of South Carolina, Columbia, SC 29208, United States
| | - Alan W Decho
- Department of Environmental Health Sciences, University of South Carolina, Columbia, SC 29208, United States
| | - Mitzi Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina, School of Medicine, Columbia, SC 29209, United States
| | - Chuanbing Tang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States.
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Ren X, Kanezashi M, Nagasawa H, Tsuru T. Preparation of organosilica membranes on hydrophobic intermediate layers and evaluation of gas permeation in the presence of water vapor. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.08.050] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Invertible micellar polymer nanoassemblies target bone tumor cells but not normal osteoblast cells. Future Sci OA 2015; 1:FSO16. [PMID: 28031891 PMCID: PMC5137969 DOI: 10.4155/fso.15.14] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Aim: To demonstrate the capability of the invertible micellar polymer nanoassemblies (IMAs) to deliver and release curcumin using the recently discovered mechanism of macromolecular inversion to treat bone tumor cells. Materials & Methods: The effect of IMA-mediated delivery of curcumin on osteosarcoma cell survival was investigated using MTS assays. To assess the effect of IMAs-delivered curcumin on osteosarcoma cell growth, fluorescence-activated cell sorting was performed. The uptake of micellar nanoassemblies was followed using confocal microscopy. Results & Discussion: IMAs-delivered curcumin is effective in blocking osteosarcoma cell growth. It decreases cell viability in human osteosarcoma (MG63, KHOS, and LM7) cells while having no effect on normal human osteoblast cells. It indicates that curcumin-loaded IMAs provide a unique delivery system targeted to osteosarcoma cells. Osteosarcoma is the most common primary bone malignancy that predominantly affects children and adolescents. Curcumin, a principal substance in the Asian spice turmeric, has been shown to block osteosarcoma cell growth. The clinical development of curcumin has been hindered due to poor aqueous solubility and thus, bioavailability, restricting its use as a drug. In this study, in order to improve the bioavailability and efficacy of curcumin, the drug was loaded (solubilized) into invertible micellar polymer nanoassemblies made from amphiphilic invertible polymers.
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Rabnawaz M, Liu G. Triblock Terpolymers Bearing a Redox-Cleavable Junction and a Photo-Cross-Linkable Block. Macromolecules 2014. [DOI: 10.1021/ma501219h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Muhammad Rabnawaz
- Department
of Chemistry, Queen’s University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6
| | - Guojun Liu
- Department
of Chemistry, Queen’s University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6
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Kudina O, Kohut A, Tarnavchyk I, Hevus I, Voronov A. Solvent-responsive self-assembly of amphiphilic invertible polymers determined with SANS. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:3310-3318. [PMID: 24606021 DOI: 10.1021/la404939w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Amphiphilic invertible polymers (AIPs) are a new class of macromolecules that self-assemble into micellar structures and rapidly change structure in response to changes in solvent polarity. Using small-angle neutron scattering (SANS) data, we obtained a quantitative description of the invertible micellar assemblies (IMAs). The detailed composition and size of the assemblies (including the effect of temperature) were measured in aqueous and toluene polymer solutions. The results show that the invertible macromolecules self-assemble into cylindrical core-shell micellar structures. The composition of the IMAs in aqueous and toluene solutions was used to reveal the inversion mechanism by changing the polarity of the medium. Our experiments demonstrate that AIP unimers self-assemble into IMAs in aqueous solution, predominantly through interactions between the hydrophobic moieties of macromolecules. The hydrophobic effect (or solvophobic interaction) is the major driving force for self-assembly. When the polarity of the environment is changed from polar to nonpolar, poly(ethylene glycol) (PEG) and aliphatic dicarboxylic acid fragments of AIP macromolecules tend to replace each other in the core and the shell of the IMAs. However, neither the interior nor the exterior of the IMAs consists of fragments of a single component of the macromolecule. In aqueous solution, with the temperature increasing from 15 to 35 °C, the IMAs' mixed core from aliphatic dicarboxylic acid and PEG moieties and PEG-based shell change the structure. As a result of the progressive dehydration of the macromolecules, the hydration level (water content) in the micellar core decreases at 25 °C, followed by dehydrated PEG fragments entering the interior of the IMAs when the temperature increases to 35 °C.
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Affiliation(s)
- Olena Kudina
- Department of Coatings and Polymeric Materials, North Dakota State University , Fargo, North Dakota 58108-6050 United States
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Kohut A, Voronov A, Voronov S. Micellization and Adsolubilization of Amphilic Invertible Polyesters. CHEMISTRY & CHEMICAL TECHNOLOGY 2014. [DOI: 10.23939/chcht08.01.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kohut A, Voronov A, Voronov S. Monomolecular Micelles Based on Amphiphilic Invertible Polymers. CHEMISTRY & CHEMICAL TECHNOLOGY 2013. [DOI: 10.23939/chcht07.03.261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Ma JZ, Liu YH, Bao Y, Liu JL, Zhang J. Research advances in polymer emulsion based on "core-shell" structure particle design. Adv Colloid Interface Sci 2013; 197-198:118-31. [PMID: 23726300 DOI: 10.1016/j.cis.2013.04.006] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 04/25/2013] [Accepted: 04/25/2013] [Indexed: 10/26/2022]
Abstract
In recent years, quite many studies on polymer emulsions with unique core-shell structure have emerged at the frontier between material chemistry and many other fields because of their singular morphology, properties and wide range of potential applications. Organic substance as a coating material onto either inorganic or organic internal core materials promises an unparalleled opportunity for enhancement of final functions through rational designs. This contribution provides a brief overview of recent progress in the synthesis, characterization, and applications of both inorganic-organic and organic-organic polymer emulsions with core-shell structure. In addition, future research trends in polymer composites with core-shell structure are also discussed in this review.
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Liu L, Watanabe H, Shirai T, Fuji M, Takahashi M. A Designed Surface Modification to Disperse Silica Powder into Polyurethane. J Appl Polym Sci 2012. [DOI: 10.1002/app.36734] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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11
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Liu L, Watanabe H, Shirai T, Fuji M, Takahashi M. Grafting hyperbranched polyurethane onto silica nanoparticle via one-pot “A2+CBn” condensation approach to improve its dispersion in polyurethane. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2011.12.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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12
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Borzenkov M, Dolynska L, Kochubei V, Nadashkevich Z, Hevus O. Obtaining of Functional Surface Active Monomers Based on tert-Butylperoxy-6-hydroxyhexanoate. CHEMISTRY & CHEMICAL TECHNOLOGY 2011. [DOI: 10.23939/chcht05.04.363] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Hevus I, Kohut A, Voronov A. Interfacial micellar phase transfer using amphiphilic invertible polymers. Polym Chem 2011. [DOI: 10.1039/c1py00399b] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Hevus I, Kohut A, Voronov A. Amphiphilic Invertible Polyurethanes: Synthesis and Properties. Macromolecules 2010. [DOI: 10.1021/ma101175k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ivan Hevus
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108
| | - Ananiy Kohut
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108
| | - Andriy Voronov
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108
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15
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Gotoh K, Kawazu T, Yoshida M, Oshitani J. A method for dispersing dry nano-sized particles in a liquid using carrier particles. ADV POWDER TECHNOL 2010. [DOI: 10.1016/j.apt.2009.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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Voronov A, Kohut A, Vasylyev S, Peukert W. Mechanism of silver ion reduction in concentrated solutions of amphiphilic invertible polyesters in nonpolar solvent at room temperature. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:12587-12594. [PMID: 18828624 DOI: 10.1021/la801769v] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Fast formation and efficient stabilization of silver nanoparticles from [Ag(NH3)2]OH are achieved in concentrated nonpolar solutions of amphiphilic invertible polyesters based on poly(ethylene oxide) (PEO) and aliphatic dicarboxylic acids. Surface-modified silver nanoparticles able to be dispersed in both a polar and nonpolar medium are developed in the form of a ready-to-use colloidal solution with an enhanced silver concentration. The PEO fragments of polyesters form cavities (also called pseudo-crown ester structures) that can bind metal ions. The reduction of bound metal ions proceeds via oxidation of polyoxyethylene fragments. No chemical reducing agents are necessary in this approach. The polyesters act simultaneously as an efficient reducing agent and stabilizer. The main focus of the present research is to clarify the chemical mechanism of silver ion reduction in amphiphilic polyester solutions. A one-electron reduction mechanism is proposed to explain the formation of silver nanoparticles. The effect of the poly(ethylene oxide) fragment length and the polyester concentration are explored by examining several amphiphilic polyesters.
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Affiliation(s)
- A Voronov
- Coatings and Polymeric Materials, North Dakota State University, 1735 NDSU Research Park Drive, Fargo, North Dakota 58105, USA.
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17
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Tomalino LM, Voronov A, Kohut A, Peukert W. Study of Amphiphilic Polyester Micelles by Hyper-Rayleigh Scattering: Invertibility and Phase Transfer. J Phys Chem B 2008; 112:6338-43. [DOI: 10.1021/jp710499z] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- L. Martinez Tomalino
- Institute of Particle Technology, Friedrich-Alexander University, Erlangen-Nuremberg, Germany, and Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58105
| | - A. Voronov
- Institute of Particle Technology, Friedrich-Alexander University, Erlangen-Nuremberg, Germany, and Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58105
| | - A. Kohut
- Institute of Particle Technology, Friedrich-Alexander University, Erlangen-Nuremberg, Germany, and Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58105
| | - W. Peukert
- Institute of Particle Technology, Friedrich-Alexander University, Erlangen-Nuremberg, Germany, and Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58105
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Luzinov I, Minko S, Tsukruk VV. Responsive brush layers: from tailored gradients to reversibly assembled nanoparticles. SOFT MATTER 2008; 4:714-725. [PMID: 32907173 DOI: 10.1039/b718999k] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We present a condensed overview of the recent developments of novel responsive thin polymer films from end-tethered chains (polymer brushes), which are different from conventional, uniform, and planar brush layers. For this discussion, we selected two types of recently introduced surface layers: binary brush layers with variable chemical composition forming a controllable gradient of composition and properties in a selected direction and brush layers either grafted directly to inorganic nanoparticles to form hybrid core-shell structures or combined with inorganic nanoparticles embedded into this layer. Unlike traditional brush layers, such a design brings a novel set of responsive surface properties allowing for capillary-driven microfluidic motion, combinatorial-like multiplexing response, reversible aggregation and dis-assembly of nanoparticles, fabrication of ultrahydrophobic coatings, and switchable mass transport across interfaces.
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Affiliation(s)
- Igor Luzinov
- School of Materials Science and Engineering and Center for Optical Materials Science and Engineering Technologies, Clemson University, Clemson, SC 29634, USA.
| | - Sergiy Minko
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY 13699, USA.
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
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De Palma R, Trekker J, Peeters S, Van Bael MJ, Bonroy K, Wirix-Speetjens R, Reekmans G, Laureyn W, Borghs G, Maes G. Surface modification of gamma-Fe2O3@SiO2 magnetic nanoparticles for the controlled interaction with biomolecules. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2007. [PMID: 18283855 DOI: 10.1021/cm0628000] [Citation(s) in RCA: 254] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Modifying the surface of magnetic nanoparticles (MNPs) to allow for controlled interaction with biomolecules enables their implementation in biomedical applications such as contrast agents for magnetic resonance imaging, labels in magnetic biosensing or media for magnetically assisted bioseparation. In this paper, self-assembly of trialkoxysilanes is used to chemically functionalize the surface of gamma-Fe2O3@SiO2 core-shell particles. First, the silane deposition procedure was optimized using infrared analysis in order to obtain maximum packing density of the silanes on the particles. The surface coverage was determined to be approximately 8 x 10(14) molecules/cm2. It was shown that the magnetic, crystalline, and morphological properties of the MNPs were not altered by deposition of a thin silane coating. The optimized procedure was transferred for the deposition of aldehyde and poly(ethylene glycol) (PEG) presenting silanes. The presence of both silanes on the particle surface was confirmed using XPS and FTIR. The interaction of proteins with silane-modified MNPs was monitored using a Bradford protein assay. Our results demonstrate that, by introducing aldehyde functions, the MNPs are capable of covalently binding human IgG while retaining their specific binding capacity. Maximum surface coverage occurs at 46 microg antibodies per mg particle, which corresponds to 35 antibodies bound to an average sized MNP (54 nm in diameter). The human IgG functionalized MNPs exhibit a high degree of specificity (approximately 90%) and retained a binding capacity of 32%. Using the same approach, streptavidin was coupled onto the MNPs and the biotin binding capacity was determined using biotinylated fluorescein. At maximum surface coverage, a biotin binding capacity of 1500 pmol/mg was obtained, corresponding to a streptavidin activity of 76%. On the other hand, by introducing PEG functions the non-specific adsorption of serum proteins could be significantly suppressed down to approximately 3 microg/mg. We conclude that self-assembly of silane films creates a generic platform for the controlled interactions of MNPs with biomolecules.
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Vileno B, Lekka M, Sienkiewicz A, Jeney S, Stoessel G, Lekki J, Forró L, Stachura Z. Stiffness alterations of single cells induced by UV in the presence of nanoTiO2. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2007; 41:5149-53. [PMID: 17711237 DOI: 10.1021/es0629561] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Nanocrystalline titanium dioxide (nanoTiO2) has been reported to generate reactive oxygen species (ROS) under UV illumination. In our studies, changes in mechanical properties of human skin fibroblasts, exposed to the oxidative stress induced in the presence of nanoTiO2 and UV light, were studied using atomic force microscopy (AFM). The exposure of cells to the action of ROS was performed at low TiO2 concentration (4 microg/mL) and under illumination with low-intensity UVA (8 and 20 mW/cm2) or UVC (0.1 mW/ cm2). AFM measurements of the cell stiffness were carried out immediately after exposure of cells to the oxidative stress. The data suggest that under illumination with low-intensity UVA nanoTiO2 generates ROS, which, in turn, damage cellular and subcellular structures. This process was detected by AFM as a marked drop in the cellular stiffness of ca. 30-75%, which occurred rapidly, in the time frame of 1 min. The photo-oxidative stress inducing the decrease of cell stiffness was cancelled in the presence of a well-established antioxidant, beta-carotene. The results highlight the sensitivity of AFM to detect early changes in mechanical properties of cells exposed to oxidative stress.
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Affiliation(s)
- Bertrand Vileno
- Institute of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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Voronov A, Kohut A, Peukert W. Synthesis of amphiphilic silver nanoparticles in nanoreactors from invertible polyester. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:360-3. [PMID: 17209576 DOI: 10.1021/la062737t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A silver complex is transformed into amphiphilic nanoparticles at room temperature using nanoreactors formed from an amphiphilic polyester. It takes a few minutes to form silver nanocolloids with a narrow particle size distribution. Developed silver forms a stable dispersion in both polar and nonpolar media. The amphiphilic polyester acts as a reducing and stabilizing agent simultaneously. The size of the synthesized amphiphilic silver nanoparticles depends on the concentration of the invertible polyester and solvent polarity.
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Affiliation(s)
- Andrej Voronov
- Institute of Particle Technology, University of Erlangen-Nuremberg, Cauerstrasse 4, 91058 Erlangen, Germany.
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Kohut A, Voronov A, Peukert W. An effective way to stabilize colloidal particles dispersed in polar and nonpolar media. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:504-8. [PMID: 17209600 DOI: 10.1021/la062465u] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
This article offers a new approach to building up self-adjustable invertible polymer coatings at solid surfaces. The approach is based on a two-step process. In the first step, the surface of dispersed TiO2 has been functionalized with the aid of toluene diisocyanate (TDI) as a coupling agent. In the second step, the chains of amphiphilic oligoester have been covalently grafted to the titanium dioxide surface functionalized with isocyanate groups. It is shown that the titania modified in this way can form stable suspensions in both polar (water) and nonpolar (toluene) media. Multiple redispersion cycles show the ability of the modified titanium dioxide particles, after their removal from one type of dispersion and consequent drying, to be redispersed in dispersing media strongly differing by polarity from the previous.
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Affiliation(s)
- A Kohut
- Institute of Particle Technology, Friedrich-Alexander University Erlangen-Nuremberg, Cauerstr. 4, 91058 Erlangen, Germany
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