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Arkas M, Bompotis T, Giannakopoulos K, Favvas EP, Arvanitopoulou M, Arvanitopoulos K, Arvanitopoulos L, Kythreoti G, Vardavoulias M, Giannakoudakis DA, Castellsagués L, Soto González SM. Hybrid Silica Xerogel and Titania/Silica Xerogel Dispersions Reinforcing Hydrophilicity and Antimicrobial Resistance of Leathers. Gels 2023; 9:685. [PMID: 37754366 PMCID: PMC10530134 DOI: 10.3390/gels9090685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 08/19/2023] [Accepted: 08/21/2023] [Indexed: 09/28/2023] Open
Abstract
Four leather substrates from different animals were treated by dispersions containing hydrophilic composite silica-hyperbranched poly(ethylene imine) xerogels. Antimicrobial activity was introduced by incorporating silver nanoparticles and/or benzalkonium chloride. The gel precursor solutions were also infused before gelation to titanium oxide powders typically employed for induction of self-cleaning properties. The dispersions from these biomimetically premade xerogels integrate environmentally friendly materials with short coating times. Scanning electron microscopy (SEM) provided information on the powder distribution onto the leathers. Substrate and coating composition were estimated by infrared spectroscopy (IR) and energy-dispersive X-ray spectroscopy (EDS). Surface hydrophilicity and water permeability were assessed by water-contact angle experiments. The diffusion of the leather's initial components and xerogel additives into the water were measured by Ultraviolet-Visible (UV-Vis) spectroscopy. Protection against GRAM- bacteria was tested for Escherichia coli, Pseudomonas aeruginosa, and Klebsiella pneumoniae against GRAM+ bacteria for Staphylococcus aureus and Enterococcus faecalis and against fungi for Candida albicans. Antibiofilm capacity experiments were performed against Staphylococcus aureus, Klebsiella pneumoniae, Enterococcus faecalis, and Candida albicans. The application of xerogel dispersions proved an adequate and economically feasible alternative to the direct gel formation into the substrate's pores for the preparation of leathers intended for medical uses.
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Affiliation(s)
- Michael Arkas
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece; (T.B.); (K.G.); (E.P.F.); (M.A.)
| | - Theofanis Bompotis
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece; (T.B.); (K.G.); (E.P.F.); (M.A.)
| | - Konstantinos Giannakopoulos
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece; (T.B.); (K.G.); (E.P.F.); (M.A.)
| | - Evangelos P. Favvas
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece; (T.B.); (K.G.); (E.P.F.); (M.A.)
| | - Marina Arvanitopoulou
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece; (T.B.); (K.G.); (E.P.F.); (M.A.)
| | | | | | - Georgia Kythreoti
- Institute of Bioscience and Applications, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece;
- Department of Science and Mathematics, School of Liberal Arts and Sciences, The American College of Greece, Deree, Gravias 6, 15342 Athens, Greece
| | | | | | - Laura Castellsagués
- Barcelona Institute for Global Health (ISGlobal), Universitat de Barcelona, 08036 Barcelona, Spain; (L.C.); (S.M.S.G.)
| | - Sara Maria Soto González
- Barcelona Institute for Global Health (ISGlobal), Universitat de Barcelona, 08036 Barcelona, Spain; (L.C.); (S.M.S.G.)
- CIBER Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029 Madrid, Spain
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Arkas M, Giannakopoulos K, Favvas EP, Papageorgiou S, Theodorakopoulos GV, Giannoulatou A, Vardavoulias M, Giannakoudakis DA, Triantafyllidis KS, Georgiou E, Pashalidis I. Comparative Study of the U(VI) Adsorption by Hybrid Silica-Hyperbranched Poly(ethylene imine) Nanoparticles and Xerogels. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13111794. [PMID: 37299697 DOI: 10.3390/nano13111794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
Two different silica conformations (xerogels and nanoparticles), both formed by the mediation of dendritic poly (ethylene imine), were tested at low pHs for problematic uranyl cation sorption. The effect of crucial factors, i.e., temperature, electrostatic forces, adsorbent composition, accessibility of the pollutant to the dendritic cavities, and MW of the organic matrix, was investigated to determine the optimum formulation for water purification under these conditions. This was attained with the aid of UV-visible and FTIR spectroscopy, dynamic light scattering (DLS), ζ-potential, liquid nitrogen (LN2) porosimetry, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). Results highlighted that both adsorbents have extraordinary sorption capacities. Xerogels are cost-effective since they approximate the performance of nanoparticles with much less organic content. Both adsorbents could be used in the form of dispersions. The xerogels, though, are more practicable materials since they may penetrate the pores of a metal or ceramic solid substrate in the form of a precursor gel-forming solution, producing composite purification devices.
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Affiliation(s)
- Michael Arkas
- National Centre for Scientific Research "Demokritos", Institute of Nanoscience and Nanotechnology, 15310 Athens, Greece
| | - Konstantinos Giannakopoulos
- National Centre for Scientific Research "Demokritos", Institute of Nanoscience and Nanotechnology, 15310 Athens, Greece
| | - Evangelos P Favvas
- National Centre for Scientific Research "Demokritos", Institute of Nanoscience and Nanotechnology, 15310 Athens, Greece
| | - Sergios Papageorgiou
- National Centre for Scientific Research "Demokritos", Institute of Nanoscience and Nanotechnology, 15310 Athens, Greece
| | - George V Theodorakopoulos
- National Centre for Scientific Research "Demokritos", Institute of Nanoscience and Nanotechnology, 15310 Athens, Greece
| | - Artemis Giannoulatou
- National Centre for Scientific Research "Demokritos", Institute of Nanoscience and Nanotechnology, 15310 Athens, Greece
| | | | | | | | - Efthalia Georgiou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Ioannis Pashalidis
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
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Arkas M, Vardavoulias M, Kythreoti G, Giannakoudakis DA. Dendritic Polymers in Tissue Engineering: Contributions of PAMAM, PPI PEG and PEI to Injury Restoration and Bioactive Scaffold Evolution. Pharmaceutics 2023; 15:pharmaceutics15020524. [PMID: 36839847 PMCID: PMC9966633 DOI: 10.3390/pharmaceutics15020524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 02/09/2023] Open
Abstract
The capability of radially polymerized bio-dendrimers and hyperbranched polymers for medical applications is well established. Perhaps the most important implementations are those that involve interactions with the regenerative mechanisms of cells. In general, they are non-toxic or exhibit very low toxicity. Thus, they allow unhindered and, in many cases, faster cell proliferation, a property that renders them ideal materials for tissue engineering scaffolds. Their resemblance to proteins permits the synthesis of derivatives that mimic collagen and elastin or are capable of biomimetic hydroxy apatite production. Due to their distinctive architecture (core, internal branches, terminal groups), dendritic polymers may play many roles. The internal cavities may host cell differentiation genes and antimicrobial protection drugs. Suitable terminal groups may modify the surface chemistry of cells and modulate the external membrane charge promoting cell adhesion and tissue assembly. They may also induce polymer cross-linking for healing implementation in the eyes, skin, and internal organ wounds. The review highlights all the different categories of hard and soft tissues that may be remediated with their contribution. The reader will also be exposed to the incorporation of methods for establishment of biomaterials, functionalization strategies, and the synthetic paths for organizing assemblies from biocompatible building blocks and natural metabolites.
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Affiliation(s)
- Michael Arkas
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece
- Correspondence: ; Tel.: +30-210-650-3669
| | | | - Georgia Kythreoti
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece
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Calcium Phosphates-Chitosan Composite Layers Obtained by Combining Radio-Frequency Magnetron Sputtering and Matrix-Assisted Pulsed Laser Evaporation Techniques. Polymers (Basel) 2022; 14:polym14235241. [PMID: 36501635 PMCID: PMC9738455 DOI: 10.3390/polym14235241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/24/2022] [Accepted: 11/28/2022] [Indexed: 12/03/2022] Open
Abstract
In this work, we report the synthesis of calcium phosphate-chitosan composite layers. Calcium phosphate layers were deposited on titanium substrates by radio-frequency magnetron sputtering technique by varying the substrate temperature from room temperature (25 °C) up to 100 and 300 °C. Further, chitosan was deposited by matrix-assisted pulsed laser evaporation technique on the calcium phosphate layers. The temperature at the substrate during the deposition process of calcium phosphate layers plays an important role in the embedding of chitosan, as scanning electron microscopy analysis showed. The degree of chitosan incorporation into the calcium phosphate layers significantly influence the physico-chemical properties and the adherence strength of the resulted layers to the substrates. For example, the decreases of Ca/P ratio at the addition of chitosan suggests that a calcium deficient hydroxyapatite structure is formed when the CaP layers are generated on Ti substrates kept at room temperature during the deposition process. The Fourier transform infrared spectroscopy analysis of the samples suggest that the PO43-/CO32- substitution is possible. The X-ray diffraction spectra indicated that the crystalline structure of the calcium phosphate layers obtained at the 300 °C substrate temperature is disturbed by the addition of chitosan. The adherence strength of the composite layers to the titanium substrates is diminished after the chitosan deposition. However, no complete exfoliation of the layers was observed.
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Arkas M, Douloudi M, Nikoli E, Karountzou G, Kitsou I, Kavetsou E, Korres D, Vouyiouka S, Tsetsekou A, Giannakopoulos K, Papageorgiou M. Investigation of two bioinspired reaction mechanisms for the optimization of nano catalysts generated from hyperbranched polymer matrices. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105238] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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An innovative layer-by-layer coated titanium hydroxide-(gentamicin-polydopamine) as a hybrid drug delivery platform. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2021.102943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Hosseini SG, Pasikhani JV. Enhanced optical properties and photocatalytic activity of TiO 2 nanotubes by using magnetic activated carbon: evaluating photocatalytic reduction of Cr(VI). ENVIRONMENTAL TECHNOLOGY 2021; 42:914-931. [PMID: 31378151 DOI: 10.1080/09593330.2019.1649466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 07/21/2019] [Indexed: 06/10/2023]
Abstract
In recent years, photocatalytic reduction of Cr(VI) to Cr(III) by TiO2 nanostructures, as a potent environmental technology has attracted a lot of attention. However, several defects including the large band gap energy of TiO2, fast photogenerated charge recombination and re-oxidation of Cr(III) restrict their practical application. In this work, the incorporation of TiO2 nanotubes (TNTs) with magnetic activated carbon (MAC) and photoreduction in the presence of a hole scavenger were studied as a preferable approach. The results revealed that coupling TNTs with 2 wt% MAC can boost the surface area from 89.54 to 307.87 m2 g-1 as well as decrease the band gap energy from 3.1 to 2.7 eV. As a consequence of the enhancement in textural features and optical properties, TNTs/MAC (2%) led to improvement of photoreduction efficiency (from 47% to 66%) in comparison with the TNTs. Meanwhile, the experiments demonstrated that using 0.2 g TNTs/MAC as an optimal dosage in acidic solution increases the photoreduction efficiency up to 81%. The hole scavenger investigation had a marvellous result. It was found that in the presence of oxalic acid, TNTs/MAC (2%) could reduce 97% of Cr(VI) which it was due to trapping oxidative species and charge-transfer-complex-mediated process. Furthermore, the kinetic study affirmed that the photoreduction follow first-order kinetics and the reaction rate constants by TNTs/MAC (2%) are 1.5 times as great as those of TNTs. Moreover, the reusability tests illustrated TNTs/MAC (2%) has good stability and is active even up to the six runs.
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Chávez A, Rey A, López J, Álvarez P, Beltrán F. Critical aspects of the stability and catalytic activity of MIL-100(Fe) in different advanced oxidation processes. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117660] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Douloudi M, Nikoli E, Katsika T, Vardavoulias M, Arkas M. Dendritic Polymers as Promising Additives for the Manufacturing of Hybrid Organoceramic Nanocomposites with Ameliorated Properties Suitable for an Extensive Diversity of Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 11:E19. [PMID: 33374206 PMCID: PMC7823723 DOI: 10.3390/nano11010019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/19/2020] [Accepted: 12/20/2020] [Indexed: 12/12/2022]
Abstract
As the field of nanoscience is rapidly evolving, interest in novel, upgraded nanomaterials with combinatory features is also inevitably increasing. Hybrid composites, offer simple, budget-conscious and environmental-friendly solutions that can cater multiple needs at the same time and be applicable in many nanotechnology-related and interdisciplinary studies. The physicochemical idiocrasies of dendritic polymers have inspired their implementation as sorbents, active ingredient carriers and templates for complex composites. Ceramics are distinguished for their mechanical superiority and absorption potential that render them ideal substrates for separation and catalysis technologies. The integration of dendritic compounds to these inorganic hosts can be achieved through chemical attachment of the organic moiety onto functionalized surfaces, impregnation and absorption inside the pores, conventional sol-gel reactions or via biomimetic mediation of dendritic matrices, inducing the formation of usually spherical hybrid nanoparticles. Alternatively, dendritic polymers can propagate from ceramic scaffolds. All these variants are covered in detail. Optimization techniques as well as established and prospected applications are also presented.
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Affiliation(s)
- Marilina Douloudi
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece; (E.N.); (T.K.)
| | - Eleni Nikoli
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece; (E.N.); (T.K.)
| | - Theodora Katsika
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece; (E.N.); (T.K.)
| | | | - Michael Arkas
- Institute of Nanoscience Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou Street, 15310 Athens, Greece; (E.N.); (T.K.)
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Lim S, Park H, Yang J, Kwak C, Lee J. Stable colloidal dispersion of octylated Ti3C2-MXenes in a nonpolar solvent. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123648] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Alitabar M, Yoozbashizadeh H. Study on the morphology and photocatalytic activity of TiO2 nanotube arrays produced by anodizing in organic electrolyte with Ni, Na, and C as dopants. J Solid State Electrochem 2018. [DOI: 10.1007/s10008-018-4089-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Sharan J, Koul V, Dinda AK, Kharbanda OP, Lale SV, Duggal R, Mishra M, Gupta G, Singh MP. Bio-functionalization of grade V titanium alloy with type I human collagen for enhancing and promoting human periodontal fibroblast cell adhesion - an in-vitro study. Colloids Surf B Biointerfaces 2017; 161:1-9. [PMID: 29035745 DOI: 10.1016/j.colsurfb.2017.10.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 10/05/2017] [Accepted: 10/06/2017] [Indexed: 11/26/2022]
Abstract
Surface modification of medical grade V titanium alloy (Ti-6Al-4V) with biomolecules is an important and vital step for tailoring it for various biomedical applications. Present study investigates theinfluence of type I human collagen (T1HC) bio-conjugation through a three stage process. Polished grade V titanium alloy discs were functionalizedwith free OH group by means of controlled heat and alkali treatment followed by coating of 3-aminopropyltriethoxy (APTES) silane couplingagent. T1HC were bio-conjugated through 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide hydrochloride N-hydroxysuccinimide (EDCNHS)coupling reaction. At each stage, grade V titanium alloy surfaces were characterized by atomic force microscopy (AFM), scanning electronmicroscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Xrayphotoelectron spectroscopy (XPS). FTIR and XPS studies confirms thecovalent attachment of APTES with titanium alloy surface while terminalamine groups of APTES remained free for further attachment of T1HCthrough covalent bond. Aqueous stability of bio-conjugated titanium discsat various pH and time intervals (i.e. at pH of 5.5, 6.8 and 8.0 at timeinterval of 27 and 48h) confirmed the stability of T1HC bioconjugated collagen on titanium surface. Further human periodontalfibroblast cell line (HPdlF) culture revealed enhanced adhesion on theT1HC bio-conjugated surface compared to the polystyrene and polishedgrade V titanium alloy surfaces.
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Affiliation(s)
- Jitendra Sharan
- Divison of Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India; Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Amit K Dinda
- Department of Pathology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Om P Kharbanda
- Divison of Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Shantanu V Lale
- Department of Chemical Engineering, Texas Tech University, Lubbock, TX 79409, USA
| | - Ritu Duggal
- Divison of Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Monu Mishra
- Physics of Energy Harvesting, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
| | - Govind Gupta
- Physics of Energy Harvesting, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
| | - Manoj P Singh
- Advanced Instrumentation Research Facility, Jawaharlal Nehru University, New Delhi 110067, India
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Bidier SA, Hashim M, Al-Diabat AM, Bououdina M. Effect of growth time on Ti-doped ZnO nanorods prepared by low-temperature chemical bath deposition. PHYSICA. E, LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES 2017; 88:169-173. [PMID: 28373813 PMCID: PMC5362154 DOI: 10.1016/j.physe.2017.01.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 12/11/2016] [Accepted: 01/04/2017] [Indexed: 06/07/2023]
Abstract
Ti-doped ZnO nanorod arrays were grown onto Si substrate using chemical bath deposition (CBD) method at 93 °C. To investigate the effect of time deposition on the morphological, and structural properties, four Ti-doped ZnO samples were prepared at various deposition periods of time (2, 3.5, 5, and 6.5 h). FESEM images displayed high-quality and uniform nanorods with a mean length strongly dependent upon deposition time; i.e. it increases for prolonged growth time. Additionally, EFTEM images reveal a strong erosion on the lateral side for the sample prepared for 6.5 h as compared to 5 h. This might be attributed to the dissolution reaction of ZnO with for prolonged growth time. XRD analysis confirms the formation of a hexagonal wurtzite-type structure for all samples with a preferred growth orientation along the c-axis direction. The (100) peak intensity was enhanced and then quenched, which might be the result of an erosion on the lateral side of nanorods as seen in EFTEM. This study confirms the important role of growth time on the morphological features of Ti-doped ZnO nanorods prepared using CBD.
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Affiliation(s)
- Shaker A. Bidier
- Institute of Nano-optoelectronics Research & Technology Laboratory (INOR), School of Physics, Universiti Sains Malaysia, USM, 11800 Penang, Malaysia
| | - M.R. Hashim
- Institute of Nano-optoelectronics Research & Technology Laboratory (INOR), School of Physics, Universiti Sains Malaysia, USM, 11800 Penang, Malaysia
| | - Ahmad M. Al-Diabat
- Institute of Nano-optoelectronics Research & Technology Laboratory (INOR), School of Physics, Universiti Sains Malaysia, USM, 11800 Penang, Malaysia
| | - M. Bououdina
- Department of Physics, College of Science, University of Bahrain, PO Box 32038, Bahrain
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Golja V, Dražić G, Lorenzetti M, Vidmar J, Ščančar J, Zalaznik M, Kalin M, Novak S. Characterisation of food contact non-stick coatings containing TiO2 nanoparticles and study of their possible release into food. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 34:421-433. [DOI: 10.1080/19440049.2016.1269954] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Viviana Golja
- Environmental Health, National Institute of Public Health, Ljubljana, Slovenia
- Jožef Stefan International Postgraduate School, Ljubljana, Slovenia
| | - Goran Dražić
- Jožef Stefan International Postgraduate School, Ljubljana, Slovenia
- Laboratory for Materials Chemistry, National Institute of Chemistry, Ljubljana, Slovenia
| | - Martina Lorenzetti
- Department of Nanostructured Materials, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Janja Vidmar
- Jožef Stefan International Postgraduate School, Ljubljana, Slovenia
- Department of Environmental Sciences, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Janez Ščančar
- Jožef Stefan International Postgraduate School, Ljubljana, Slovenia
- Department of Environmental Sciences, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Maša Zalaznik
- Laboratory for Tribology and Interface Nanotechnology, Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia
| | - Mitjan Kalin
- Laboratory for Tribology and Interface Nanotechnology, Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia
| | - Saša Novak
- Jožef Stefan International Postgraduate School, Ljubljana, Slovenia
- Department of Nanostructured Materials, Jožef Stefan Institute, Ljubljana, Slovenia
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Majidnia Z, Fulazzaky MA. Photoreduction of Pb(II) ions from aqueous solution by titania polyvinylalcohol–alginate beads. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.05.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Kadem LF, Holz M, Suana KG, Li Q, Lamprecht C, Herges R, Selhuber-Unkel C. Rapid Reversible Photoswitching of Integrin-Mediated Adhesion at the Single-Cell Level. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:1799-1802. [PMID: 26685922 DOI: 10.1002/adma.201504394] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 11/02/2015] [Indexed: 06/05/2023]
Abstract
Rapid and reversible photoswitching of cell adhesion is achieved by c(RGDfK)-azobenzenes embedded in a poly(ethylene glycol) background on surfaces. The light-induced cis-trans-isomerization of the azobenzene enables switching of cell adhesion on the surface. Reversibility of switching over several consecutive switching cycles is demonstrated by single-cell force spectroscopy.
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Affiliation(s)
- Laith F Kadem
- Institute for Materials Science, University of Kiel, Kaiserstr. 2, 24143, Kiel, Germany
| | - Michelle Holz
- Otto-Diels-Institute of Organic Chemistry, University of Kiel, Otto-Hahn-Platz 4, 24098, Kiel, Germany
| | - Kristine Grace Suana
- Otto-Diels-Institute of Organic Chemistry, University of Kiel, Otto-Hahn-Platz 4, 24098, Kiel, Germany
| | - Qian Li
- Institute for Materials Science, University of Kiel, Kaiserstr. 2, 24143, Kiel, Germany
| | - Constanze Lamprecht
- Institute for Materials Science, University of Kiel, Kaiserstr. 2, 24143, Kiel, Germany
| | - Rainer Herges
- Otto-Diels-Institute of Organic Chemistry, University of Kiel, Otto-Hahn-Platz 4, 24098, Kiel, Germany
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Tsiourvas D, Tsetsekou A, Kammenou MI, Boukos N. Biomimetic synthesis of ribbon-like hydroxyapatite employing poly( l -arginine). MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:1225-31. [DOI: 10.1016/j.msec.2015.09.076] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 09/14/2015] [Accepted: 09/19/2015] [Indexed: 02/04/2023]
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18
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Wang X, Masse S, Laurent G, Hélary C, Coradin T. Impact of Polyethylenimine Conjugation Mode on the Cell Transfection Efficiency of Silica Nanovectors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:11078-11085. [PMID: 26387475 DOI: 10.1021/acs.langmuir.5b02616] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The conjugation of polyethylenimine (PEI) to silica nanoparticles has emerged as a useful strategy in gene delivery. Here we investigate the influence of the PEI conjugation mode on the transfection ability of plain silica nanoparticles. Surface functionalization with sulfonate- and chloride-bearing silanes modulates the amount and conformation of PEI and therefore the particles' affinity for the plasmid, without impacting on cytotoxicity. However, transfection efficiency in both immortalized and primary cells is more directly correlated to the nature and strength of the particle-PEI interactions. It suggests that PEI detachment from the particle surface at the stage of endosomal escape is a key event in the plasmid delivery process. These data should provide fruitful guidelines for the fine tuning of colloidal surfaces intended for intracellular delivery of bioactive molecules.
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Affiliation(s)
- Xiaolin Wang
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Sylvie Masse
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Guillaume Laurent
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Christophe Hélary
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Thibaud Coradin
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
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Vanderleyden E, Van Bael S, Chai Y, Kruth JP, Schrooten J, Dubruel P. Gelatin functionalised porous titanium alloy implants for orthopaedic applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 42:396-404. [DOI: 10.1016/j.msec.2014.05.048] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 04/25/2014] [Accepted: 05/23/2014] [Indexed: 12/14/2022]
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Zhao S, Chen Y, Liu B, Chen M, Mao J, He H, Zhao Y, Huang N, Wan G. A dual‐task design of corrosion‐controlling and osteo‐compatible hexamethylenediaminetetrakis‐ (methylene phosphonic acid) (HDTMPA) coating on magnesium for biodegradable bone implants application. J Biomed Mater Res A 2014; 103:1640-52. [DOI: 10.1002/jbm.a.35301] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/22/2014] [Accepted: 08/01/2014] [Indexed: 12/22/2022]
Affiliation(s)
- Sheng Zhao
- Key Laboratory of Advanced Technologies of MaterialsMinistry of Education, College of Materials Science and Engineering, Southwest Jiaotong UniversityChengdu610031 China
| | - Yingqi Chen
- Key Laboratory of Advanced Technologies of MaterialsMinistry of Education, College of Materials Science and Engineering, Southwest Jiaotong UniversityChengdu610031 China
| | - Bo Liu
- Key Laboratory of Advanced Technologies of MaterialsMinistry of Education, College of Materials Science and Engineering, Southwest Jiaotong UniversityChengdu610031 China
| | - Meiyun Chen
- Key Laboratory of Advanced Technologies of MaterialsMinistry of Education, College of Materials Science and Engineering, Southwest Jiaotong UniversityChengdu610031 China
| | - Jinlong Mao
- Key Laboratory of Advanced Technologies of MaterialsMinistry of Education, College of Materials Science and Engineering, Southwest Jiaotong UniversityChengdu610031 China
| | - Hairuo He
- Chemistry DepartmentHollins UniversityRoanoke Virginia24020‐1707
| | - Yuancong Zhao
- Key Laboratory of Advanced Technologies of MaterialsMinistry of Education, College of Materials Science and Engineering, Southwest Jiaotong UniversityChengdu610031 China
| | - Nan Huang
- Key Laboratory of Advanced Technologies of MaterialsMinistry of Education, College of Materials Science and Engineering, Southwest Jiaotong UniversityChengdu610031 China
| | - Guojiang Wan
- Key Laboratory of Advanced Technologies of MaterialsMinistry of Education, College of Materials Science and Engineering, Southwest Jiaotong UniversityChengdu610031 China
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Paredes V, Salvagni E, Rodríguez‐Castellon E, Gil FJ, Manero JM. Study on the use of 3‐aminopropyltriethoxysilane and 3‐chloropropyltriethoxysilane to surface biochemical modification of a novel low elastic modulus Ti–Nb–Hf alloy. J Biomed Mater Res B Appl Biomater 2014; 103:495-502. [DOI: 10.1002/jbm.b.33226] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 05/22/2014] [Indexed: 01/16/2023]
Affiliation(s)
- V. Paredes
- Nanoengineering Research Centre (CRnE), Technical University of Catalonia (UPC)Barcelona Spain
- Department of Materials Science and Metallurgy, Biomaterials, Biomechanics and Tissue Engineering GroupTechnical University of Catalonia (UPC)Barcelona Spain
| | - E. Salvagni
- Nanoengineering Research Centre (CRnE), Technical University of Catalonia (UPC)Barcelona Spain
- Department of Materials Science and Metallurgy, Biomaterials, Biomechanics and Tissue Engineering GroupTechnical University of Catalonia (UPC)Barcelona Spain
| | | | - F. J. Gil
- Nanoengineering Research Centre (CRnE), Technical University of Catalonia (UPC)Barcelona Spain
- CIBERCentro de Investigación Biomédica en RedMadrid Spain
| | - J. M. Manero
- Nanoengineering Research Centre (CRnE), Technical University of Catalonia (UPC)Barcelona Spain
- Department of Materials Science and Metallurgy, Biomaterials, Biomechanics and Tissue Engineering GroupTechnical University of Catalonia (UPC)Barcelona Spain
- CIBERCentro de Investigación Biomédica en RedMadrid Spain
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Cui W, Beniash E, Gawalt E, Xu Z, Sfeir C. Biomimetic coating of magnesium alloy for enhanced corrosion resistance and calcium phosphate deposition. Acta Biomater 2013; 9:8650-9. [PMID: 23816653 DOI: 10.1016/j.actbio.2013.06.031] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 06/15/2013] [Accepted: 06/20/2013] [Indexed: 11/29/2022]
Abstract
Degradable metals have been suggested as biomaterials with revolutionary potential for bone-related therapies. Of these candidate metals, magnesium alloys appear to be particularly attractive candidates because of their non-toxicity and outstanding mechanical properties. Despite their having been widely studied as orthopedic implants for bone replacement/regeneration, their undesirably rapid corrosion rate under physiological conditions has limited their actual clinical application. This study reports the use of a novel biomimetic peptide coating for Mg alloys to improve the alloy corrosion resistance. A 3DSS biomimetic peptide is designed based on the highly acidic, bioactive bone and dentin extracellular matrix protein, phosphophoryn. Surface characterization techniques (scanning electron microscopy, energy dispersive X-ray spectroscopy and diffuse-reflectance infrared spectroscopy) confirmed the feasibility of coating the biomimetic 3DSS peptide onto Mg alloy AZ31B. The 3DSS peptide was also used as a template for calcium phosphate deposition on the surface of the alloy. The 3DSS biomimetic peptide coating presented a protective role of AZ31B in both hydrogen evolution and electrochemical corrosion tests.
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Affiliation(s)
- W Cui
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
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Meikle ST, Bianchi G, Olivier G, Santin M. Osteoconductive phosphoserine-modified poly({varepsilon}-lysine) dendrons: synthesis, titanium oxide surface functionalization and response of osteoblast-like cell lines. J R Soc Interface 2013. [PMID: 23193106 DOI: 10.1098/rsif.2012.0765] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The lack of direct bonding between the surface of an implant and the mineralized bony tissue is among the main causes of aseptic loosening in titanium-based implants. Surface etching and ceramic coatings have led to improved osteointegration, but their clinical performance is still limited either by partial bonding or by coating delamination. In this work, a solid-phase synthesis method has been optimized to produce poly(ε-lysine) dendrons, the outermost branching generation of which is functionalized by phosphoserine (PS), a known catalyst of the biomineralization process. The dendrons were deposited onto etched titanium oxide surfaces as a near-to-monolayer film able to induce the formation of a homogeneous calcium phosphate phase in a simulated body fluid over 3 days. The dendron films also stimulated MG63 and SAOS-2 osteoblast-like cells to proliferate at a rate significantly higher than etched titanium, with SAOS-2 also showing a higher degree of differentiation over 14 days. PS-tethered dendron films were not affected by various sterilization methods and UV treatment appeared to improve the cell substrate potential of these films, thus suggesting their potential as a surface functionalization method for bone implants.
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Affiliation(s)
- S T Meikle
- Brighton Studies in Tissue-mimicry and Aided Regeneration, School of Pharmacy and Biomolecular Sciences, University of Brighton, , Huxley Building, Lewes Road, Brighton, UK
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The promotion of osseointegration of titanium surfaces by coating with silk protein sericin. Biomaterials 2013; 34:2855-64. [PMID: 23357374 DOI: 10.1016/j.biomaterials.2013.01.019] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 01/04/2013] [Indexed: 02/04/2023]
Abstract
A promising strategy to influence the osseointegration process around orthopaedic titanium implants is the immobilization of bioactive molecules. This recruits appropriate interaction between the surface and the tissue by directing cells adhesion, proliferation, differentiation and active matrix remodelling. In this study, we aimed to investigate the functionalization of metallic implant titanium with silk protein sericin. Titanium surface was immobilized with non-mulberry Antheraea mylitta sericin using glutaraldehyde as crosslinker. To analyse combinatorial effects the sericin immobilized titanium was further conjugated with integrin binding peptide sequence Arg-Gly-Asp (RGD) using ethyl (dimethylaminopropyl) carbodiimide and N-hydroxysulfosuccinimide as coupling agents. The surface of sericin immobilized titanium was characterized biophysically. Osteoblast-like cells were cultured on sericin and sericin/RGD functionalized titanium and found to be more viable than those on pristine titanium. The enhanced adhesion, proliferation, and differentiation of osteoblast cells were observed. RT-PCR analysis showed that mRNA expressions of bone sialoprotein, osteocalcin and alkaline phosphatase were upregulated in osteoblast cells cultured on sericin and sericin/RGD immobilized titanium substrates. Additionally, no significant amount of pro-inflammatory cytokines TNF-α, IL-1β and nitric oxide production were recorded when macrophages cells and osteoblast-macrophages co culture cells were grown on sericin immobilized titanium. The findings demonstrate that the sericin immobilized titanium surfaces are potentially useful bioactive coated materials for titanium-based medical implants.
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Gubbuk IH, Ozmen M, Maltas E. Immobilization and characterization of hemoglobin on modified sporopollenin surfaces. Int J Biol Macromol 2012; 50:1346-52. [DOI: 10.1016/j.ijbiomac.2012.04.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 03/29/2012] [Accepted: 04/09/2012] [Indexed: 11/26/2022]
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Bougas K, Stenport VF, Currie F, Wennerberg A. In vitro Evaluation of Calcium Phosphate Precipitation on Possibly Bioactive Titanium Surfaces in the Presence of Laminin. J Oral Maxillofac Res 2011; 2:e3. [PMID: 24421995 PMCID: PMC3886075 DOI: 10.5037/jomr.2011.2303] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2011] [Accepted: 07/19/2011] [Indexed: 11/30/2022]
Abstract
Objectives The aim of the present study was to evaluate calcium phosphate precipitation
and the amount of precipitated protein on three potentially bioactive
surfaces when adding laminin in simulated body fluid. Material and Methods Blasted titanium discs were prepared by three different techniques claimed to
provide bioactivity: alkali and heat treatment (AH), anodic oxidation (AO)
or hydroxyapatite coating (HA). A blasted surface incubated in
laminin-containing simulated body fuid served as a positive control (B)
while a blasted surface incubated in non laminin-containing simulated body
fuid served as a negative control (B-). The immersion time was 1 hour, 24
hours, 72 hours and 1 week. Surface topography was investigated by
interferometry and morphology by Scanning Electron Microscopy (SEM).
Analysis of the precipitated calcium and phosphorous was performed by Energy
Dispersive X-ray Spectroscopy (EDX) and the adsorbed laminin was quantified
by iodine (125I) labeling. Results SEM demonstrated that all specimens except for the negative control were
totally covered with calcium phosphate (CaP) after 1 week. EDX revealed that
B- demonstrated lower sum of Ca and P levels compared to the other groups
after 1 week. Iodine labeling demonstrated that laminin precipitated in a
similar manner on the possibly bioactive surfaces as on the positive control
surface. Conclusions Our results indicate that laminin precipitates equally on all tested titanium
surfaces and may function as a nucleation center thus locally elevating the
calcium concentration. Nevertheless further studies are required to clarify
the role of laminin in the interaction of biomaterials with the host bone
tissue.
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Affiliation(s)
- Kostas Bougas
- Department of Prosthodontics, Faculty of Odontology, Malmö University Malmö Sweden. ; Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
| | - Victoria Franke Stenport
- Department of Prosthodontics, Faculty of Odontology, Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden. ; Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
| | | | - Ann Wennerberg
- Department of Prosthodontics, Faculty of Odontology, Malmö University Malmö Sweden. ; Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
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