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Chen S, Zhou B, Chen H, Yuan R. Iron mediated autotrophic denitrification for low C/N ratio wastewater: A review. ENVIRONMENTAL RESEARCH 2023; 216:114687. [PMID: 36356669 DOI: 10.1016/j.envres.2022.114687] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 10/06/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
In recent years, iron mediated autotrophic denitrification has been a concern because it overcomes the absence of organic carbon and has been successfully used in denitrification for low C/N ratio wastewater. However, there is currently a lack of a more systematic summary of iron-based materials that can be used for denitrification, and no detailed overview about the mechanism of iron mediated autotrophic denitrification has been reported. In this study, the iron materials with different valence states that can be used for denitrification were summarized, and emphasized, as well as the mechanism in different interaction systems were emphasize. In addition, the contribution of various microorganisms in nitrate reduction were analyzed and the effects of operating conditions and water quality were evaluated. Finally, the challenges and shortcomings of the denitrification process were discussed aiming to find better practical engineering applications of iron-based denitrification.
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Affiliation(s)
- Shaoting Chen
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Department of Environmental Science and Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Beihai Zhou
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Department of Environmental Science and Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Huilun Chen
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Department of Environmental Science and Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Rongfang Yuan
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Department of Environmental Science and Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
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Photocatalytic Degradation of Antibiotics by Superparamagnetic Iron Oxide Nanoparticles. Tetracycline Case. Catalysts 2021. [DOI: 10.3390/catal11101243] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
Abstract
The challenges associated with the uncontrolled presence of antibiotics such as tetracycline in the environment have necessitated their removal through different techniques. Tetracycline is hard to degrade in living organisms and can even be converted to more toxic substances. In view of this, we synthesized iron oxide nanoparticles with good magnetization (70 emu g−1) and 15 nm particle size for the adsorption and photocatalytic degradation of tetracycline. Characterization carried out on the synthesized iron oxides revealed a bandgap of 1.83 eV and an isoelectric point at pH 6.8. The results also showed that the pH of the solution does not directly influence the adsorption of tetracycline. The adsorption isotherm was consistent with the model proposed by Langmuir, having 97 mg g−1 adsorption capacity. Combined with the superparamagnetic behavior, this capacity is advantageous for the magnetic extraction of tetracycline from wastewater. The mechanisms of adsorption were proposed to be hydrogen bonding and n-π interactions. Photocatalytic degradation studies showed that approximately 40% of tetracycline degraded within 60 min of irradiation time with UV/vis light. The kinetics of photodegradation of tetracycline followed the pseudo-first-order mechanism, proceeding through hydroxyl radicals generated under illumination. Moreover, the photogenerated hydrogen peroxide could lead to heterogeneous photo-Fenton processes on the surface of iron oxide nanoparticles, additionally generating hydroxyl and hydroperoxyl radicals and facilitating photodegradation of tetracycline.
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Hydrophobic self-healing polymer coatings from carboxylic acid- and fluorine-containing polymer nanocontainers. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.02.050] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Tzameret A, Ketter-Katz H, Edelshtain V, Sher I, Corem-Salkmon E, Levy I, Last D, Guez D, Mardor Y, Margel S, Rotenstrich Y. In vivo MRI assessment of bioactive magnetic iron oxide/human serum albumin nanoparticle delivery into the posterior segment of the eye in a rat model of retinal degeneration. J Nanobiotechnology 2019; 17:3. [PMID: 30630490 PMCID: PMC6327435 DOI: 10.1186/s12951-018-0438-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 12/31/2018] [Indexed: 12/17/2022] Open
Abstract
Background Retinal degeneration diseases affect millions of patients worldwide and lead to incurable vision loss. These diseases are caused by pathologies in the retina and underlying choroid, located in the back of the eye. One of the major challenges in the development of treatments for these blinding diseases is the safe and efficient delivery of therapeutics into the back of the eye. Previous studies demonstrated that narrow size distribution core–shell near infra-red fluorescent iron oxide (IO) nanoparticles (NPs) coated with human serum albumin (HSA, IO/HSA NPs) increase the half-life of conjugated therapeutic factors, suggesting they may be used for sustained release of therapeutics. In the present study, the in vivo tracking by MRI and the long term safety of IO/HSA NPs delivery into the suprachoroid of a rat model of retinal degeneration were assessed. Results Twenty-five Royal College of Surgeons (RCS) pigmented rats received suprachoroidal injection of 20-nm IO/HSA NPs into the right eye. The left eye was not injected and used as control. Animals were examined by magnetic resonance imaging (MRI), electroretinogram (ERG) and histology up to 30 weeks following injection. IO/HSA NPs were detected in the back part of the rats’ eyes up to 30 weeks following injection by MRI, and up to 6 weeks by histology. No significant differences in retinal structure and function were observed between injected and non-injected eyes. There was no significant difference in the weight of IO/HSA NP-injected animals compared to non-injected rats. Conclusions MRI could track the nanoparticles in the posterior segment of the injected eyes demonstrating their long-term persistence, and highlighting the possible use of MRI for translational studies in animals and in future clinical studies. Suprachoroidal injection of IO/HSA NPs showed no sign of adverse effects on retinal structure and function in a rat model of retinal degeneration, suggesting that suprachoroidal delivery of IO/HSA NPs is safe and that these NPs may be used in future translational and clinical studies for extended release drug delivery at the back of the eye. Electronic supplementary material The online version of this article (10.1186/s12951-018-0438-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Adi Tzameret
- Goldschleger Eye Institute, Sheba Medical Center, 52621, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel-Aviv University, 69978, Tel-Aviv, Israel
| | - Hadas Ketter-Katz
- Goldschleger Eye Institute, Sheba Medical Center, 52621, Tel-Hashomer, Israel
| | - Victoria Edelshtain
- Goldschleger Eye Institute, Sheba Medical Center, 52621, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel-Aviv University, 69978, Tel-Aviv, Israel
| | - Ifat Sher
- Goldschleger Eye Institute, Sheba Medical Center, 52621, Tel-Hashomer, Israel
| | - Enav Corem-Salkmon
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, 52900, Ramat-Gan, Israel
| | - Itay Levy
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, 52900, Ramat-Gan, Israel
| | - David Last
- Advanced Technology Center, Sheba Medical Center, 52621, Ramat-Gan, Israel
| | - David Guez
- Advanced Technology Center, Sheba Medical Center, 52621, Ramat-Gan, Israel
| | - Yael Mardor
- Sackler Faculty of Medicine, Tel-Aviv University, 69978, Tel-Aviv, Israel.,Advanced Technology Center, Sheba Medical Center, 52621, Ramat-Gan, Israel
| | - Shlomo Margel
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, 52900, Ramat-Gan, Israel
| | - Ygal Rotenstrich
- Sackler Faculty of Medicine, Tel-Aviv University, 69978, Tel-Aviv, Israel.
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Amine functional magnetic nanoparticles via waterborne thiol-ene suspension photopolymerization for antibody immobilization. Colloids Surf B Biointerfaces 2018; 170:122-128. [PMID: 29894832 DOI: 10.1016/j.colsurfb.2018.05.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 05/07/2018] [Accepted: 05/26/2018] [Indexed: 12/27/2022]
Abstract
The modification of magnetic nanoparticles (MNPs) via different routes for biomolecule binding is an attractive area of research. Waterborne thiol-ene suspension photopolymerization (TESP) can be a useful method for preparing functional MNPs. In this study, for the very first time waterborne TESP was performed in the presence of MNPs. Neat MNPs were coated and in situ functionalized with amine groups by using thiol-ene chemistry. Engrailed-2 (EN2) protein, a potential biomarker for various cancers such as prostate cancer, bladder cancer, breast cancer and ovarian cancer, is known to be a strong binder to a specific DNA sequence (50-TAATTA-30) to regulate transcription. Anti-EN2 antibodies were immobilized onto these MNPs by physical adsorption and covalent bonding methods, respectively. The amount of the physically immobilized antibodies (0.54 mg/g) were found to be lower than the loading of the covalently bonded antibodies (1.775 mg/g). The biomarker level in the artificial solutions prepared was determined by enzyme-linked immunosorbent assay. Coated MNPs were characterized by FTIR, TGA, SEM and STEM. After TESP, the average diameter of the neat magnetite nanoparticles increased from ∼15 nm to ∼32 nm.
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Yi D, Zhang Q, Liu Y, Song J, Tang Y, Caruso F, Wang Y. Synthesis of Chemically Asymmetric Silica Nanobottles and Their Application for Cargo Loading and as Nanoreactors and Nanomotors. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607330] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Deliang Yi
- Department of Chemistry; Fudan University; Shanghai 200433 P.R. China
| | - Qian Zhang
- Department of Chemistry; Fudan University; Shanghai 200433 P.R. China
| | - Yinghua Liu
- Department of Chemistry; Fudan University; Shanghai 200433 P.R. China
| | - Jiaying Song
- Department of Chemistry; Fudan University; Shanghai 200433 P.R. China
| | - Yi Tang
- Department of Chemistry; Fudan University; Shanghai 200433 P.R. China
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical and Biomolecular Engineering; The University of Melbourne; Parkville Victoria 3010 Australia
| | - Yajun Wang
- Department of Chemistry; Fudan University; Shanghai 200433 P.R. China
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Yi D, Zhang Q, Liu Y, Song J, Tang Y, Caruso F, Wang Y. Synthesis of Chemically Asymmetric Silica Nanobottles and Their Application for Cargo Loading and as Nanoreactors and Nanomotors. Angew Chem Int Ed Engl 2016; 55:14733-14737. [DOI: 10.1002/anie.201607330] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/08/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Deliang Yi
- Department of Chemistry Fudan University Shanghai 200433 P.R. China
| | - Qian Zhang
- Department of Chemistry Fudan University Shanghai 200433 P.R. China
| | - Yinghua Liu
- Department of Chemistry Fudan University Shanghai 200433 P.R. China
| | - Jiaying Song
- Department of Chemistry Fudan University Shanghai 200433 P.R. China
| | - Yi Tang
- Department of Chemistry Fudan University Shanghai 200433 P.R. China
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical and Biomolecular Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Yajun Wang
- Department of Chemistry Fudan University Shanghai 200433 P.R. China
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Haham H, Natan M, Gutman O, Kolitz-Domb M, Banin E, Margel S. Engineering of Superparamagnetic Core-Shell Iron Oxide/N-Chloramine Nanoparticles for Water Purification. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18488-18495. [PMID: 27348740 DOI: 10.1021/acsami.6b05806] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, we describe the synthesis and characterization of superparamagnetic core-shell iron oxide (IO)/N-halamine antibacterial nanoparticles (NPs). For this purpose, superparamagnetic IO core NPs were coated with cross-linked polymethacrylamide (PMAA) by surfactant-free dispersion copolymerization of methacrylamide and N,N-methylenebis(acrylamide) in an aqueous continuous phase. The effect of the polymerization process on the chemical composition, size, shape, crystallinity, and magnetic properties of the IO/PMAA NPs was elucidated. Conversion of the core-shell IO/PMAA NPs into their N-halamine form, IO/PMAA-Cl, was accomplished using a chlorination reaction with sodium hypochlorite. The influence of chlorination on the shape, crystallinity, and magnetic properties of the IO/PMAA NPs was studied. The IO/PMAA-Cl NPs demonstrated excellent antibacterial activity against Gram-negative and Gram-positive bacteria. Finally, the chlorination recharging capabilities of the NPs and their potential for use in the purification of water containing bacteria were demonstrated with magnetic columns packed with the IO/PMAA-Cl NPs.
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Affiliation(s)
- Hai Haham
- Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University , Ramat-Gan 5290002, Israel
| | - Michal Natan
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University , Ramat-Gan 5290002, Israel
| | - Ori Gutman
- Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University , Ramat-Gan 5290002, Israel
| | - Michal Kolitz-Domb
- Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University , Ramat-Gan 5290002, Israel
| | - Ehud Banin
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University , Ramat-Gan 5290002, Israel
| | - Shlomo Margel
- Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University , Ramat-Gan 5290002, Israel
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Pang YL, Lim S, Ong HC, Chong WT. Synthesis, characteristics and sonocatalytic activities of calcined γ-Fe2O3 and TiO2 nanotubes/γ-Fe2O3 magnetic catalysts in the degradation of Orange G. ULTRASONICS SONOCHEMISTRY 2016; 29:317-327. [PMID: 26585012 DOI: 10.1016/j.ultsonch.2015.10.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 10/04/2015] [Accepted: 10/04/2015] [Indexed: 06/05/2023]
Abstract
In this work, γ-Fe2O3 and TiO2 NTs/γ-Fe2O3 composites with good magnetism and sonocatalytic activity were prepared by a facile polyol method and utilize the principle of isoelectric point method, respectively. The structural and magnetic features of the prepared calcined γ-Fe2O3 and composite catalysts were investigated by transmission electron microscopy (TEM), powder X-ray diffraction (XRD), surface analysis, UV-Vis diffuse reflectance spectra (UV-Vis DRS), vibrating sample magnetometry (VSM) and zeta potential analysis. The effects of calcination temperature on γ-Fe2O3 phase variation, physical properties and sonocatalytic properties were investigated. The porosity, specific surface area, band gap energy and sonocatalytic activity of γ-Fe2O3 were gradually decreased with calcination temperature increased. TiO2 NTs/γ-Fe2O3 with appropriate composition and specific structural features possess synergetic effects such as efficient separation of charge carriers and hydroxyl radicals produced by heterogeneous fenton and fenton-like reactions. This enhanced the sonocatalytic activity for the degradation of Orange G under ultrasonic irradiation. The sonocatalytic reactions obeyed pseudo first-order kinetics. All these information provide insight into the design and development of high-efficiency catalyst for wastewater treatment.
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Affiliation(s)
- Yean Ling Pang
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, 43000 Kajang, Selangor, Malaysia; Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Steven Lim
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, 43000 Kajang, Selangor, Malaysia; Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Hwai Chyuan Ong
- Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Wen Tong Chong
- Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Haham H, Grinblat J, Sougrati MT, Stievano L, Margel S. Engineering of Iron-Based Magnetic Activated Carbon Fabrics for Environmental Remediation. MATERIALS 2015; 8:4593-4607. [PMID: 28793459 PMCID: PMC5455670 DOI: 10.3390/ma8074593] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 06/30/2015] [Accepted: 07/10/2015] [Indexed: 11/17/2022]
Abstract
Magnetic Fe3O4, Fe and Fe/Pd nanoparticles embedded within the pores of activated carbon fabrics (ACF) were prepared by impregnation of the ACF in iron acetylacetanoate (Fe(acac)3) ethanol solution, followed by thermal decomposition of the embedded iron precursor at 200, 400 and 600 °C in an inert atmosphere. The effect of the annealing temperature on the chemical composition, shape, crystallinity, surface area, pore volume, and magnetic properties of the various functionalized ACF was elucidated. The Fe nanoparticles within the ACF were also doped with tinier Pd nanoparticles, by impregnation of the Fe/ACF in palladium acetate ethanol solution. The potential use of the functionalized ACF for removal of a model azo-dye, orange II, was demonstrated. This study illustrated the enhanced removal of the dye from an aqueous solution according to the following order: Fe/Pd/ACF > Fe/ACF > ACF. In addition, the enhanced activity of Fe3O4/ACF in the presence of increasing concentrations of H2O2 (Fenton catalysts) was also illustrated.
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Affiliation(s)
- Hai Haham
- Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel.
| | - Judith Grinblat
- Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel.
| | - Moulay-Tahar Sougrati
- Institute Charles Gerhardt (UMR 5253 CNRS), Université Montpellier 2, CC 1502, Place E. Bataillon, Montpellier 34095, Cedex 5, France.
| | - Lorenzo Stievano
- Institute Charles Gerhardt (UMR 5253 CNRS), Université Montpellier 2, CC 1502, Place E. Bataillon, Montpellier 34095, Cedex 5, France.
| | - Shlomo Margel
- Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel.
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Levy I, Sher I, Corem-Salkmon E, Ziv-Polat O, Meir A, Treves AJ, Nagler A, Kalter-Leibovici O, Margel S, Rotenstreich Y. Bioactive magnetic near Infra-Red fluorescent core-shell iron oxide/human serum albumin nanoparticles for controlled release of growth factors for augmentation of human mesenchymal stem cell growth and differentiation. J Nanobiotechnology 2015; 13:34. [PMID: 25947109 PMCID: PMC4432958 DOI: 10.1186/s12951-015-0090-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Accepted: 04/06/2015] [Indexed: 11/10/2022] Open
Abstract
Background Iron oxide (IO) nanoparticles (NPs) of sizes less than 50 nm are considered to be non-toxic, biodegradable and superparamagnetic. We have previously described the generation of IO NPs coated with Human Serum Albumin (HSA). HSA coating onto the IO NPs enables conjugation of the IO/HSA NPs to various biomolecules including proteins. Here we describe the preparation and characterization of narrow size distribution core-shell NIR fluorescent IO/HSA magnetic NPs conjugated covalently to Fibroblast Growth Factor 2 (FGF2) for biomedical applications. We examined the biological activity of the conjugated FGF2 on human bone marrow mesenchymal stem cells (hBM-MSCs). These multipotent cells can differentiate into bone, cartilage, hepatic, endothelial and neuronal cells and are being studied in clinical trials for treatment of various diseases. FGF2 enhances the proliferation of hBM-MSCs and promotes their differentiation toward neuronal, adipogenic and osteogenic lineages in vitro. Results The NPs were characterized by transmission electron microscopy, dynamic light scattering, ultraviolet–visible spectroscopy and fluorescence spectroscopy. Covalent conjugation of the FGF2 to the IO/HSA NPs significantly stabilized this growth factor against various enzymes and inhibitors existing in serum and in tissue cultures. IO/HSA NPs conjugated to FGF2 were internalized into hBM-MSCs via endocytosis as confirmed by flow cytometry analysis and Prussian Blue staining. Conjugated FGF2 enhanced the proliferation and clonal expansion capacity of hBM-MSCs, as well as their adipogenic and osteogenic differentiation to a higher extent compared with the free growth factor. Free and conjugated FGF2 promoted the expression of neuronal marker Microtubule-Associated Protein 2 (MAP2) to a similar extent, but conjugated FGF2 was more effective than free FGF2 in promoting the expression of astrocyte marker Glial Fibrillary Acidic Protein (GFAP) in these cells. Conclusions These results indicate that stabilization of FGF2 by conjugating the IO/HSA NPs can enhance the biological efficacy of FGF2 and its ability to promote hBM-MSC cell proliferation and trilineage differentiation. This new system may benefit future therapeutic use of hBM-MSCs. Electronic supplementary material The online version of this article (doi:10.1186/s12951-015-0090-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Itay Levy
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan, 52900, Israel.
| | - Ifat Sher
- Goldschleger Eye Institute, Sackler Faculty of Medicine, Tel Aviv University, Sheba Medical Center, Tel-Hashomer, 52621, Israel.
| | - Enav Corem-Salkmon
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan, 52900, Israel.
| | - Ofra Ziv-Polat
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan, 52900, Israel.
| | - Amilia Meir
- Center for Stem Cells and Regenerative Medicine, Cancer Research Center, Sheba Medical Center, Tel-Hashomer, 52621, Israel.
| | - Avraham J Treves
- Center for Stem Cells and Regenerative Medicine, Cancer Research Center, Sheba Medical Center, Tel-Hashomer, 52621, Israel.
| | - Arnon Nagler
- Hematology Division, Sheba Medical Center, Tel-Hashomer, 52621, Israel.
| | - Ofra Kalter-Leibovici
- Unit of Cardiovascular Epidemiology, Gertner Institute for Epidemiology and Health Policy Research, Ramat Gan, Israel, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
| | - Shlomo Margel
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan, 52900, Israel.
| | - Ygal Rotenstreich
- Goldschleger Eye Institute, Sackler Faculty of Medicine, Tel Aviv University, Sheba Medical Center, Tel-Hashomer, 52621, Israel.
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Mero O, Sougrati MT, Jumas JC, Margel S. Engineered magnetic core-shell SiO2/Fe microspheres and "medusa-like" microspheres of SiO2/iron oxide/carbon nanofibers or nanotubes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:9850-9858. [PMID: 25089849 DOI: 10.1021/la502142m] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Iron oxide (IO) thin coatings of controlled thickness on SiO2 microspheres of narrow size distribution were prepared by decomposition at 160 °C of triiron dodecacarbonyl onto silica microspheres dispersed in diethylene glycol diethyl ether free of surfactant or stabilizer. The dried washed SiO2/IO core-shell microspheres were annealed at different temperatures and time periods under inert (Ar) or reducing (H2) atmosphere. The effect of temperature on the chemical composition, morphology, crystallinity, and magnetic properties of the IO and the elemental Fe nanoparticles type coatings onto the SiO2 core microspheres has been elucidated. "Medusa-like" SiO2/IO/carbon nanofibers and tubes particles were prepared by CVD of ethylene on the surface of the SiO2/IO microspheres at different temperatures. The morphology change of the grafted carbon nanofibers and tubes as a function of the CVD temperature was also elucidated.
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Affiliation(s)
- On Mero
- Institute of Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University , Ramat-Gan 52900, Israel
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Suguna M, Kumar NS, Sreenivasulu V, Krishnaiah A. Removal of Pb(II) from Aqueous Solutions by using Chitosan Coated Zero Valent Iron Nanoparticles. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.901361] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Synthesis and electrochemical performance of porous carbons by carbonization of self-assembled polymer bricks. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.03.098] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Jordan N, Ritter A, Scheinost AC, Weiss S, Schild D, Hübner R. Selenium(IV) uptake by maghemite (γ-Fe2O3). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:1665-1674. [PMID: 24422437 DOI: 10.1021/es4045852] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The mechanism of selenium(IV) uptake by maghemite was investigated on both the macroscopic and the molecular level. Maghemite nanoparticles exhibited fast adsorption kinetics toward selenium(IV). Batch experiments showed a decreased sorption with increasing pH (3.5-11). Ionic strength variations (0.01 to 0.1 M NaCl) had no significant influence on selenium(IV) uptake. Electrophoretic mobility measurements revealed a significant shift toward lower values of the isoelectric point of maghemite upon selenium(IV) uptake, suggesting the formation of inner-sphere surface complexes. At the molecular level, using X-ray Absorption Fine-Structure Spectroscopy (EXAFS), the formation of both bidentate binuclear corner-sharing ((2)C) and bidentate mononuclear edge-sharing ((1)E) inner-sphere surface complexes was observed, with a trend toward solely (1)E complexes at high pH. The absence of a tridentate surface complex as observed for arsenic(III) and antimonite(III) might be due to the relatively small size of the Se(IV)O3 unit. These new spectroscopic results can be implemented in reactive transport models to improve the prediction of selenium migration behavior in the environment as well as its monitoring through its interaction with maghemite or maghemite layers at the surface of magnetite. Due to its chemical stability even at low pH and its magnetization properties allowing magnetic separation, maghemite is a promising sorbing phase for the treatment of Se polluted waters.
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Affiliation(s)
- Norbert Jordan
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf e.V. , 01328 Dresden, Germany
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Szpak A, Fiejdasz S, Prendota W, Strączek T, Kapusta C, Szmyd J, Nowakowska M, Zapotoczny S. T 1-T 2 Dual-modal MRI contrast agents based on superparamagnetic iron oxide nanoparticles with surface attached gadolinium complexes. JOURNAL OF NANOPARTICLE RESEARCH : AN INTERDISCIPLINARY FORUM FOR NANOSCALE SCIENCE AND TECHNOLOGY 2014; 16:2678. [PMID: 25328426 PMCID: PMC4193999 DOI: 10.1007/s11051-014-2678-6] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 09/26/2014] [Indexed: 05/20/2023]
Abstract
Dual-mode MRI contrast agents consisting of superparamagnetic iron oxide nanoparticle (SPION) cores and gadolinium ions associated with the ionic chitosan protecting layer were synthesized and studied. Gadolinium ions were introduced into the coating layer via direct complex formation on the nanoparticles surface, covalent attachment or electrostatically driven deposition of the preformed Gd complex. The modified SPIONs having hydrodynamic diameters ca. 100 nm form stable, well-defined dispersions in water and have excellent magnetic properties. Physiochemical properties of those new materials were characterized using e.g., FTIR spectroscopy, dynamic light scattering, X-ray fluorescence, TEM, and vibrating sample magnetometry. They behave as superparamagnetics and shorten both T1 and T2 proton relaxation times, thus influencing both r1 and r2 relaxivity values that reach 53.7 and 375.5 mM-1 s-1, respectively, at 15 MHz. The obtained materials can be considered as highly effective contrast agents for low-field MRI, particularly useful at permanent magnet-based scanners.
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Affiliation(s)
- Agnieszka Szpak
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Sylwia Fiejdasz
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Witold Prendota
- Department of Solid State Physics, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland
| | - Tomasz Strączek
- Department of Solid State Physics, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland
| | - Czesław Kapusta
- Department of Solid State Physics, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland
| | - Janusz Szmyd
- Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland
| | - Maria Nowakowska
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Szczepan Zapotoczny
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
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Preparation and Characterization of Nanocomposite Microspheres of Polystyrene and Fe 3O 4 by Emulsifier-Free Emulsion Polymerization. ACTA ACUST UNITED AC 2013. [DOI: 10.4028/www.scientific.net/amr.804.123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Composite microspheres of polystyrene and nanoFe3O4 particles were prepared through emulsifier-free polymerization with ultrasonic dispersion. The properties of composite microsphere were investigated by FT-IR spectrum, X-ray diffraction analysis, TEM, SEM and VSM. The determine results showed that Fe3O4particles prepared by coprecipitation in lab were about 7~8 nm and with a narrow size distribution and superparamagnetic characteristics. The composite microsphere of polystyrene and Fe3O4showed a diameter around 20~30 nm under TEM and SEM. The data of XRD indicated crystal forms of Fe3O4in the composite microsphere did not change. The XRD spectrum of composite microsphere was a overlap of Fe3O4crystal and amorphous polystyrene. The result of hysteresis curve indicated that the composite microspheres still had superparamagnetic characteristics.
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Yagüe JL, Gleason KK. Enhanced Cross-Linked Density by Annealing on Fluorinated Polymers Synthesized via Initiated Chemical Vapor Deposition To Prevent Surface Reconstruction. Macromolecules 2013. [DOI: 10.1021/ma4010633] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jose Luis Yagüe
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139,
United States
| | - Karen K. Gleason
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139,
United States
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Muthiah M, Park IK, Cho CS. Surface modification of iron oxide nanoparticles by biocompatible polymers for tissue imaging and targeting. Biotechnol Adv 2013; 31:1224-36. [PMID: 23528431 DOI: 10.1016/j.biotechadv.2013.03.005] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 02/19/2013] [Accepted: 03/11/2013] [Indexed: 11/25/2022]
Abstract
Superparamagnetic iron oxide nanoparticles (SPIONs) are excellent MR contrast agents when coated with biocompatible polymers such as hydrophilic synthetic polymers, proteins, polysaccharides, and lipids, which improve their stability and biocompatibility and reduce their aggregation. Various biocompatible materials, coated or conjugated with targeting moieties such as galactose, mannose, folic acid, antibodies and RGD, have been applied to SPION surfaces to provide tissue specificity to hepatocytes, macrophages, and tumor regions in order to reduce non-specific uptake and improve biocompatibility. This review discusses the recent progress in the development of biocompatible and hydrophilic polymers for improving stability of SPIONs and describes the carbohydrates based biocompatible materials that are providing SPIONs with cell/tissue specificity as ligands.
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Affiliation(s)
- Muthunarayanan Muthiah
- Department of Biomedical Sciences and Center for Biomedical Human Resources (BK-21 project), Chonnam National University Medical School, Gwangju 501-757, South Korea; Clinical Vaccine R&D Center, Chonnam National University Hwasun Hospital, Jeonnam 519-763, South Korea
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Magnetic nanoparticles grafted with β-cyclodextrin–polyurethane polymer as a novel nanomagnetic polymer brush catalyst for nucleophilic substitution reactions of benzyl halides in water. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2012.08.012] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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21
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Varela A, Oliveira G, Souza F, Rodrigues C, Costa M. New petroleum absorbers based on cardanol-furfuraldehyde magnetic nanocomposites. POLYM ENG SCI 2012. [DOI: 10.1002/pen.23229] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Betancourt-Galindo R, Cabrera Miranda C, Puente Urbina BA, Castañeda-Facio A, Sánchez-Valdés S, Mata Padilla J, García Cerda LA, Perera YA, Rodríguez-Fernández OS. Encapsulation of Silver Nanoparticles in a Polystyrene Matrix by Miniemulsion Polymerization and Its Antimicrobial Activity. ACTA ACUST UNITED AC 2012. [DOI: 10.5402/2012/186851] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Surface-modified silver nanoparticles (NAg) were encapsulated into a polystyrene (PS) matrix by in situ miniemulsion polymerization. Silver nanoparticles were modified with 3-aminopropyltrimethoxysilane (APTMS) that acts as a coupling agent and costabilizer in the polymerization reaction. The PS-Nag nanocomposites synthesized via miniemulsion polymerization were made at two different concentrations of the initiator (0.7 and 2.5 g/L in H2O); at higher concentration of the initiator the conversion and efficiency of encapsulation increases, and the average particle size decreases. The PS-NAg composites showed excellent antimicrobial performance toward bacteria such as Escherichia coli and Staphylococcus aureus.
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Affiliation(s)
- R. Betancourt-Galindo
- Departamento de Materiales Avanzados, Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo no. 140, 25253 Saltillo, COAH, Mexico
| | - C. Cabrera Miranda
- Departamento de Materiales Avanzados, Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo no. 140, 25253 Saltillo, COAH, Mexico
| | - B. A. Puente Urbina
- Departamento de Materiales Avanzados, Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo no. 140, 25253 Saltillo, COAH, Mexico
| | - A. Castañeda-Facio
- Departamento de Materiales Avanzados, Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo no. 140, 25253 Saltillo, COAH, Mexico
| | - S. Sánchez-Valdés
- Departamento de Materiales Avanzados, Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo no. 140, 25253 Saltillo, COAH, Mexico
| | - J. Mata Padilla
- Departamento de Materiales Avanzados, Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo no. 140, 25253 Saltillo, COAH, Mexico
| | - L. A. García Cerda
- Departamento de Materiales Avanzados, Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo no. 140, 25253 Saltillo, COAH, Mexico
| | - Y. A. Perera
- Departamento de Materiales Avanzados, Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo no. 140, 25253 Saltillo, COAH, Mexico
| | - O. S. Rodríguez-Fernández
- Departamento de Materiales Avanzados, Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo no. 140, 25253 Saltillo, COAH, Mexico
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Skaat H, Ziv-Polat O, Shahar A, Margel S. Enhancement of the growth and differentiation of nasal olfactory mucosa cells by the conjugation of growth factors to functional nanoparticles. Bioconjug Chem 2011; 22:2600-10. [PMID: 22029397 DOI: 10.1021/bc200454k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Growth factors are critical components in the tissue engineering approach. Basic fibroblast growth factor (bFGF), a representative growth factor, stimulates the cellular functions of various cells and has been used extensively for the repair and regeneration of tissues. The in vivo half-life time of free bFGF is short, about 3-10 min, due to rapid enzymatic degradation. Stabilization of the bFGF was accomplished by the covalent or physical conjugation of this factor to fluorescent maghemite (γ-Fe(2)O(3)) nanoparticles. In the present study, nasal olfactory mucosa (NOM) cells from adult rats were cultured in suspension on chitosan microcarriers (MCs) in the presence of the nonconjugated or bFGF-conjugated nanoparticles, or the free factor. The floating cells/nonconjugated, conjugated, or free bFGF/MCs aggregates were then seeded in a viscous gel. In this manuscript, we are the first to report that the stabilization of the factor by its conjugation to these nanoparticles significantly improved NOM cell-proliferation properties (migration, growth, and differentiation), compared to the same concentration, or even five times higher, of the free factor. This novel approach may significantly contribute to the advancement of the tissue engineering field.
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Affiliation(s)
- Hadas Skaat
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan, Israel
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Agrawal P, Bajpai AK. Dynamic Column Adsorption Studies of Toxic Cr(VI) Ions onto Iron Oxide Loaded Gelatin Nanoparticles. J DISPER SCI TECHNOL 2011. [DOI: 10.1080/01932691.2010.505871] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Agrawal P, Bajpai AK. Synthesis of Iron Oxide Based Gelatin Nanocomposites and their Applications in Removal of Cr (VI) Ions from Aqueous Solutions. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2010. [DOI: 10.1080/10601325.2011.528308] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Paez JI, Cappelletti AL, Baruzzi AM, Brunetti V, Strumia MC. Preparation, Characterization and Application of Modified Surfaces with 3,5-Bis(3,5-dinitrobenzoyl-amino) benzoic acid. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.201050405] [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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27
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Xu X, Wang Q, Choi HC, Kim YH. Encapsulation of iron nanoparticles with PVP nanofibrous membranes to maintain their catalytic activity. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2009.11.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Organic/Inorganic Composite Latexes: The Marriage of Emulsion Polymerization and Inorganic Chemistry. HYBRID LATEX PARTICLES 2010. [DOI: 10.1007/12_2010_60] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Skaat H, Sorci M, Belfort G, Margel S. Effect of maghemite nanoparticles on insulin amyloid fibril formation: Selective labeling, kinetics, and fibril removal by a magnetic field. J Biomed Mater Res A 2009; 91:342-51. [DOI: 10.1002/jbm.a.32232] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Geng B, Jin Z, Li T, Qi X. Preparation of chitosan-stabilized Fe(0) nanoparticles for removal of hexavalent chromium in water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2009; 407:4994-5000. [PMID: 19545888 DOI: 10.1016/j.scitotenv.2009.05.051] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2008] [Revised: 05/22/2009] [Accepted: 05/26/2009] [Indexed: 05/28/2023]
Abstract
Chitosan-stabilized Fe(0) nanoparticles (CTO-Fe(0)) and Fe(0) nanoparticles synthesized in ethanol-water mixed system (EW-Fe(0)) were tested for reduction of Cr(VI) in water. Fourier transform infrared (FTIR) study suggested that nitrogen and oxygen atoms are the binding sites for chitosan on iron which was accountable for the stability of Fe(0) nanoparticles. While the EW-Fe(0) ignites spontaneously when exposed to air, the CTO-Fe(0) was still in zero valence state after exposure to air over 2-month period as shown by X-ray powder diffraction patterns. Batch experiments demonstrated that the maximum Cr(VI) reduction rates for CTO-Fe(0) was about 3 times higher than EW-Fe(0). Characterizations with high-resolution X-ray photoelectron spectroscopy (HR-XPS) revealed that Cr(VI) was reduced to Cr(III) and Fe(III) was the only component present on the Fe(0) nanoparticles surface. Additionally, chitosan can inhibited the formation of Fe(III)-Cr(III) precipitation due to its high ability to chelate Fe(III) which resulted in k(obs) for CTO-Fe(0) was about 1-3 times higher than EW-Fe(0). Due to the fast reaction kinetics and good stability against oxidation in air, the chitosan-stabilized Fe(0) nanoparticles have the potential to become an effective agent for in situ subsurface environment remediation.
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Affiliation(s)
- Bing Geng
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China
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32
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Tang E, Dong S. Preparation of styrene polymer/ZnO nanocomposite latex via miniemulsion polymerization and its antibacterial property. Colloid Polym Sci 2009. [DOI: 10.1007/s00396-009-2057-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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33
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Skaat H, Belfort G, Margel S. Synthesis and characterization of fluorinated magnetic core-shell nanoparticles for inhibition of insulin amyloid fibril formation. NANOTECHNOLOGY 2009; 20:225106. [PMID: 19433878 DOI: 10.1088/0957-4484/20/22/225106] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Maghemite (gamma-Fe2O3) magnetic nanoparticles of 15.0 +/- 2.1 nm are formed by nucleation followed by controlled growth of maghemite thin films on gelatin-iron oxide nuclei. Uniform magnetic gamma-Fe2O3/poly (2,2,3,3,4,4,4-heptafluorobutyl acrylate) (gamma-Fe2O3/PHFBA) core-shell nanoparticles are prepared by emulsion polymerization of the fluorinated monomer 2,2,3,3,4,4,4-heptafluorobutyl acrylate (HFBA) in the presence of the maghemite nanoparticles. The kinetics of the insulin fibrillation process in the absence and in the presence of the gamma-Fe2O3/PHFBA core-shell nanoparticles are elucidated. A significant direct slow transition from alpha-helix to beta-sheets during insulin fibril formation is observed in the presence of the gamma-Fe2O3/PHFBA nanoparticles. This is in contradiction to our previous manuscript, which illustrated that the gamma-Fe2O3 core nanoparticles do not affect the kinetics of the formation of the insulin fibrils, and to other previous publications that describe acceleration of the fibrillation process by using various types of nanoparticles. These core-shell nanoparticles may therefore be also useful for the inhibition of conformational changes of other amyloidogenic proteins that lead to neurodegenerative diseases such as Alzheimer's, Parkinson's, Huntington's, mad cow and prion diseases.
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Affiliation(s)
- Hadas Skaat
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel
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Desvaux C, Dumestre F, Amiens C, Respaud M, Lecante P, Snoeck E, Fejes P, Renaud P, Chaudret B. FeCo nanoparticles from an organometallic approach: synthesis, organisation and physical properties. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b816509b] [Citation(s) in RCA: 27] [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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