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Kazantsev SO, Bakina OV, Pervikov AV, Rodkevich NG, Quang NH, Le Thi LA, Timofeev SS, Lozhkomoev AS. Antimicrobial Activity and Sorption Behavior of Al 2O 3/Ag Nanocomposites Produced with the Water Oxidation of Bimetallic Al/Ag Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3888. [PMID: 36364663 PMCID: PMC9658416 DOI: 10.3390/nano12213888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 10/28/2022] [Accepted: 10/31/2022] [Indexed: 06/16/2023]
Abstract
The water oxidation of bimetallic Al/Ag nanoparticles has been shown to yield nanoscale structures whose morphology, phase composition and textural characteristics are determined by the synthesis conditions. Flower-like nanoscale structures with silver nanoparticles, with an average size of 17 nm, are formed in water at 60 °C. Under hydrothermal conditions at temperatures of 200 °C and a pressure of 16 MPa, boehmite nanoplatelets with silver nanoparticles, with an average size of 22 nm, are formed. The oxidation of Al/Ag nanoparticles using humid air at 60 °C and 80% relative humidity results in the formation of rod-shaped bayerite nanoparticles and Ag nanoparticles with an average size of 19 nm. The thermal treatment of nanoscale structures obtained at a temperature of 500 °C has been shown to lead to a phase transition into γ-Al2O3, while maintaining the original morphology, and to a decrease in the average size of the silver nanoparticles to 12 nm and their migration to the surface of nanoscale structures. The migration of silver to the nanoparticle surface influences the formation of a double electric layer of particles, and leads to a shift in the pH of the zero-charge point by approximately one, with the nanostructures acquiring pronounced antimicrobial properties.
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Affiliation(s)
- Sergey O. Kazantsev
- Laboratory of Nanobioengineering, Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Pr. Akademicheskii 2/4, 634055 Tomsk, Russia
| | - Olga V. Bakina
- Laboratory of Nanobioengineering, Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Pr. Akademicheskii 2/4, 634055 Tomsk, Russia
| | - Aleksandr V. Pervikov
- Laboratory of Physical Chemistry of Ultrafine Materials, Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Pr. Akademicheskii 2/4, 634055 Tomsk, Russia
| | - Nikolay G. Rodkevich
- Laboratory of Physical Chemistry of Ultrafine Materials, Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Pr. Akademicheskii 2/4, 634055 Tomsk, Russia
| | - Nguyen Hong Quang
- Laboratory Military Medicine and Adaptation, Vietnam-Russia Tropical Center, Institute of Bio-Medicine, Ngia Do, Kau Zai, St. Nguyen Van Huen, 63, Hanoi 11307, Vietnam
| | - Lan Anh Le Thi
- Laboratory of Toxicity and Tropical Diseases, Vietnam-Russia Tropical Center, Institute of Bio-Medicine, Ngia Do, Kau Zai, St. Nguyen Van Huen, 63, Hanoi 11307, Vietnam
| | - Sergei S. Timofeev
- Laboratory of Physical Chemistry of Ultrafine Materials, Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Pr. Akademicheskii 2/4, 634055 Tomsk, Russia
| | - Aleksandr S. Lozhkomoev
- Laboratory of Nanobioengineering, Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Pr. Akademicheskii 2/4, 634055 Tomsk, Russia
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Facile synthesis and characterization of novel rapid-setting spherical sub-micron bioactive glasses cements and their biocompatibility in vitro. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:646-652. [PMID: 28415511 DOI: 10.1016/j.msec.2017.02.095] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 12/09/2016] [Accepted: 02/21/2017] [Indexed: 12/20/2022]
Abstract
Dental pulp vitality is extremely important for the tooth viability, since it provides nutrition and forms the dentin. Bioactive glasses (BGs) may be promising materials for pulp repair due to their excellent abilities of rapidly bonding to bone and stimulating new bone growth. However, the unsatisfied handling property, low plasticity, and poor rapid-setting property of traditional BGs limit its application in vital pulp therapy. Spherical bioactive glasses (SBGs) exhibited higher osteogenesis and odontogenic differentiation than irregular BGs. This study focuses on the application of SBGs with rapid setting property for dental pulp repair. Here, SBGs with various compositions were successfully synthesized by a sol-gel process using dodecylamine (DDA) served as both a catalyst and a template. The maximum content of CaO in SBGs was about 15%. The non-bridge oxygen amounts of the SiO network and the apatite-forming ability increased with the content proportion of CaO and P2O5. Bioactive glass pulp capping materials (BGPCMs) were prepared by mixing the SBGs powders and the phosphate buffer solution (PBS). The K3CaH(PO4)2 and hydroxyapatite (HA) formed between SBGs particles as soon as they were mixed with PBS solution. The compressive strengths of fully set BCPCM-2 molded were measured to be 31.76±1.9577MPa after setting for 24h. The K3CaH(PO4)2 and the low crystallinity HA phases at the initial stage of solidification transformed to crystalline HA for 3days, and the compressive strength was still higher than 10MPa. Additionally, SBG-2 with a designed molar composition of 35% SiO2, 55% CaO and 10% P2O5 more promoted dental pulp cell proliferation, and could be potential pulp capping applications.
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Pedone A, Muniz-Miranda F, Tilocca A, Menziani MC. The antioxidant properties of Ce-containing bioactive glass nanoparticles explained by Molecular Dynamics simulations. BIOMEDICAL GLASSES 2016. [DOI: 10.1515/bglass-2016-0003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractMolecular dynamics simulations of two glass nanoparticles with composition 25Na2O·25CaO 50SiO2 mol% (Ce-K NP) and 46.1SiO2·24.4Na2O·26.9CaO· 2.6P2O5 mol.% (Ce-BG NP) doped with 3.6 mol% of CeO2 have been carried out in order to explain the enhanced antioxidant properties of the former glass with respect to the latter.The present models show that the different catalase mimetic activity of the two NPs is related to the Ce3+/Ce4+ ratio exposed at their surface. In fact, this ratio is about 3.5 and 13 in the bulk and at the surface of the Ce-BG NP, and 1.0 and 2.1 in the bulk and at the surface of the Ce-K NPs, respectively. Since both oxidation states are necessary for the catalysis of the dismutation reaction of hydrogen peroxides, NPs with a very high Ce3+/Ce4+ ratio possess poorer antioxidant properties.Moreover, our simulations reveal that the already low silicate connectivity found in the bulk glasses examined here is further reduced on the nanoparticle surface, whereas the Na+/Ca2+ ratio rapidly increases. Sodium, calcium and cerium sites in proximity of the surface are found to be under-coordinated, prone to quickly react with water present in physiological environments, thus accelerating the glass biodegradation
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Tilocca A. Atomic-scale models of early-stage alkali depletion and SiO2-rich gel formation in bioactive glasses. Phys Chem Chem Phys 2015; 17:2696-702. [DOI: 10.1039/c4cp04711g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular dynamics simulations of Na+/H+-exchanged 45S5 Bioglass® reveal the co-existence of bonded and non-bonded hydroxyls, suggesting a direct mechanism for forming a silica-rich gel structure upon the initial ion exchange.
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Affiliation(s)
- Antonio Tilocca
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
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Kapoor S, Goel A, Tilocca A, Dhuna V, Bhatia G, Dhuna K, Ferreira JMF. Role of glass structure in defining the chemical dissolution behavior, bioactivity and antioxidant properties of zinc and strontium co-doped alkali-free phosphosilicate glasses. Acta Biomater 2014; 10:3264-78. [PMID: 24709542 DOI: 10.1016/j.actbio.2014.03.033] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 03/19/2014] [Accepted: 03/30/2014] [Indexed: 11/19/2022]
Abstract
We investigated the structure-property relationships in a series of alkali-free phosphosilicate glass compositions co-doped with Zn(2+) and Sr(2+). The emphasis was laid on understanding the structural role of Sr(2+) and Zn(2+) co-doping on the chemical dissolution behavior of glasses and its impact on their in vitro bioactivity. The structure of glasses was studied using molecular dynamics simulations in combination with solid state nuclear magnetic resonance spectroscopy. The relevant structural properties are then linked to the observed degradation behavior, in vitro bioactivity, osteoblast proliferation and oxidative stress levels. The apatite-forming ability of glasses has been investigated by X-ray diffraction, infrared spectroscopy and scanning electron microscopy-energy-dispersive spectroscopy after immersion of glass powders/bulk in simulated body fluid (SBF) for time durations varying between 1h and 14 days, while their chemical degradation has been studied in Tris-HCl in accordance with ISO 10993-14. All the glasses exhibit hydroxyapatite formation on their surface within 1-3h of their immersion in SBF. The cellular responses were observed in vitro on bulk glass samples using human osteosarcoma MG63 cell line. The dose-dependent cytoprotective effect of glasses with respect to the concentration of zinc and strontium released from the glasses is also discussed.
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Affiliation(s)
- Saurabh Kapoor
- Department of Materials and Ceramic Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal
| | - Ashutosh Goel
- Department of Materials Science and Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854-8065, USA.
| | - Antonio Tilocca
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Vikram Dhuna
- Department of Biotechnology, DAV College, Amritsar 143-001, Punjab, India
| | - Gaurav Bhatia
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar 143-005, Punjab, India
| | - Kshitija Dhuna
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar 143-005, Punjab, India
| | - José M F Ferreira
- Department of Materials and Ceramic Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal.
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Berardo E, Corno M, Cormack AN, Ugliengo P, Tilocca A. Probing the fate of interstitial water in bulk bioactive glass by ab initio simulations. RSC Adv 2014. [DOI: 10.1039/c4ra05810k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The mechanism and effects of the interaction of a water molecule with different sites found in the bulk of 45S5 bioactive glass have been investigated through ab initio simulations.
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Affiliation(s)
- Enrico Berardo
- Department of Chemistry
- University College London
- London WC1H 0AJ, UK
| | - Marta Corno
- Dipartimento di Chimica and NIS (Nanostructured Interfaces and Surfaces)
- Universitá di Torino
- 10125 Torino, Italy
| | | | - Piero Ugliengo
- Dipartimento di Chimica and NIS (Nanostructured Interfaces and Surfaces)
- Universitá di Torino
- 10125 Torino, Italy
| | - Antonio Tilocca
- Department of Chemistry
- University College London
- London WC1H 0AJ, UK
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Tilocca A. Current challenges in atomistic simulations of glasses for biomedical applications. Phys Chem Chem Phys 2014; 16:3874-80. [DOI: 10.1039/c3cp54913e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Atomic-scale simulations of bioglasses are being used to tackle several challenging aspects, such as new structural markers of bioactivity, ion migration and nanosized samples.
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Affiliation(s)
- Antonio Tilocca
- Department of Chemistry
- University College London
- London WC1H 0AJ, UK
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Berardo E, Pedone A, Ugliengo P, Corno M. DFT modeling of 45S5 and 77S soda-lime phospho-silicate glass surfaces: clues on different bioactivity mechanism. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5749-5759. [PMID: 23594027 DOI: 10.1021/la304795w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The reactivity of bioglasses, which is related to the dissolution of cations and orthosilicate groups in the physiological fluid, strongly depends on the key structural features present at the glass surfaces. On the basis of the composition and the synthetic routes employed to make the glass, surfaces with very different characteristics and thus presenting different mechanisms of dissolution can be observed. In this paper, the surface structures of two very different bioglass compositions, namely 45S5 (46.1 SiO2, 24.4 Na2O, 26.9 CaO, and 2.6 P2O5 mol %) and 77S (80.0 SiO2, 16.0 CaO, and 4.0 P2O5 mol %), have been investigated by means of periodic DFT calculations based on a PBE functional and localized Gaussian basis set as encoded in the CRYSTAL code. Our calculations show that the two glass surfaces differ by the relative amount of key structural sites such as NBOs, exposed ions, orthosilicate units, and small rings. We have demonstrated how the number of these sites affects the surface stability and reactivity (bioactivity).
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Affiliation(s)
- Enrico Berardo
- Dipartimento di Chimica and NIS-Nanostructured Interfaces and Surfaces-Centre of Excellence, Università degli Studi di Torino, Torino, Italy
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Abdollahi S, Ma ACC, Cerruti M. Surface transformations of Bioglass 45S5 during scaffold synthesis for bone tissue engineering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1466-1474. [PMID: 23305513 DOI: 10.1021/la304647r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In physiological fluid, a layer of hydroxycarbonate apatite, similar to bone mineral, develops on the surface of Bioglass 45S5. Collagen from the surrounding tissue is adsorbed on this layer that attracts osteoblasts, and favors bone regrowth. Bioglass is therefore an osteoinductive material. Still, due to its brittleness, the glass alone cannot be used to heal large bone defects. To overcome this issue, Bioglass is used to form a composite scaffold with poly(D,L-lactide) (PDLLA), a biodegradable polymer. The goal of this work is to understand Bioglass reactivity throughout scaffold fabrication via a low-temperature route, the solvent casting and particulate leaching technique. Changes in Bioglass (especially its surface) are susceptible to occur both while in contact with the processing fluids and potentially through a reaction with the surrounding polymeric matrix. Here we analyzed the surface changes of three different Bioglass samples: (i) as-received, (ii) treated in solutions that parallel those used in scaffold fabrication, and (iii) extracted from the scaffolds. We showed that extracted, just like treated, Bioglass deviates from the as-received, but to a larger extent. X-ray photoelectron and infrared spectroscopy support the theory that Bioglass surface was modified not just through contact with the solutions in scaffold fabrication, but upon an interaction with the polymeric matrix. The polymer network slows down the Na(+)/H(+) exchange between Bioglass and water used to leach salt particles to create pores within the scaffold. Changes in surface properties affect the bioactivity of Bioglass and thus of the composite scaffolds, and are therefore critical to identify.
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Affiliation(s)
- Sara Abdollahi
- Biointerface Laboratory, Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec H3A 2B2, Canada
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Goel A, Kapoor S, Tilocca A, Rajagopal RR, Ferreira JMF. Structural role of zinc in biodegradation of alkali-free bioactive glasses. J Mater Chem B 2013; 1:3073-3082. [DOI: 10.1039/c3tb20163e] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gao C, Gao Q, Li Y, Rahaman MN, Teramoto A, Abe K. In vitroevaluation of electrospun gelatin-bioactive glass hybrid scaffolds for bone regeneration. J Appl Polym Sci 2012. [DOI: 10.1002/app.37946] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Cormack AN, Tilocca A. Structure and biological activity of glasses and ceramics. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2012; 370:1271-1280. [PMID: 22349242 DOI: 10.1098/rsta.2011.0371] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Biomaterials for repairing and regenerating parts of the human body play a key role in contemporary medicine, and have an increasing impact in modern society. Given the importance of orthopaedic medicine (bone is the second most replaced organ after blood), bioactive glasses and ceramics represent a key reference to guide technological advances in this field. Their established role in current biomedical applications has already led many research groups worldwide to look into their structural properties, with a view to identifying the molecular basis of their biological activity. As the efforts directed towards this crucial and exciting direction continue to increase, it is now timely to review the situation, in order to guide future investigations on structure-bioactivity relationships. In this introductory article, the field is reviewed, to provide an appropriate context for the contributions to this Theme Issue.
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Affiliation(s)
- A N Cormack
- New York State College of Ceramics, Alfred University, Alfred, NY 14802, USA.
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