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Ptasiewicz M, Chałas R, Idaszek J, Maksymiuk P, Kister M, Kister KA, Kurzydłowski KJ, Magryś A. In Vitro Effects of Silver Nanoparticles on Pathogenic Bacteria and on Metabolic Activity and Viability of Human Mesenchymal Stem Cells. Arch Immunol Ther Exp (Warsz) 2024; 72:aite-2024-0007. [PMID: 38421273 DOI: 10.2478/aite-2024-0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 01/30/2024] [Indexed: 03/02/2024]
Abstract
The rapid development of nanotechnology has led to the use of silver nanoparticles (Ag-NPs) in various biomedical fields. However, the effect of Ag-NPs on human mesenchymal stem cells (hMSCs) is not fully understood. Moreover, too frequent an exposure to products containing nanosilver in sublethal amounts raises widespread concerns that it will lead to the development of silver-resistant microorganisms. Therefore, this study aimed to evaluate the mechanism of action of Ag-NPs on hMSCs by analyzing the cellular uptake of Ag-NPs by the cells and its effect on their viability and to assess antimicrobial activity of Ag-NPs against emerging bacterial strains, including multidrug-resistant pathogens. For metabolic activity and viability evaluation, hMSCs were incubated with different concentrations of Ag-NPs (14 μg/mL, 7 μg/mL, and 3.5 μg/mL) for 10 min., 1 h and 24 h and subsequently analyzed for their viability by live-dead staining and metabolic activity by the MTS assay. The effect of Ag-NPs on bacterial pathogens was studied by determining their minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). In conclusion, it was observed that exposure of hMSCs to Ag-NPs of size <10 nm has no cytotoxic effect on the metabolic activity of the cells at the concentration of 3.5 μg/mL, with minimal cytotoxic effect being observed at the concentration of 14 μg/mL after 24 h of incubation. Our findings also confirmed that Ag-NPs at the concentration of 4 μg/mL are effective broad-spectrum bactericidal agents, regardless of the antibiotic-resistance mechanism present in bacteria.
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Affiliation(s)
- Maja Ptasiewicz
- Department of Oral Medicine, Medical University of Lublin, Lublin, Poland
| | - Renata Chałas
- Department of Oral Medicine, Medical University of Lublin, Lublin, Poland
| | - Joanna Idaszek
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Paweł Maksymiuk
- Department of Oral Medicine, Medical University of Lublin, Lublin, Poland
| | - Mateusz Kister
- Chair and Clinic of Maxillofacial Surgery, Medical University of Lublin, Lublin, Poland
| | | | | | - Agnieszka Magryś
- Chair and Department of Medical Microbiology, Medical University of Lublin, Lublin, Poland
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2
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Golubeva A, Roychoudhury P, Dąbek P, Pałczyńska J, Pryshchepa O, Piszczek P, Pomastowski P, Gloc M, Dobrucka R, Feliczak-Guzik A, Nowak I, Kurzydłowski KJ, Buszewski B, Witkowski A. A novel effective bio-originated methylene blue adsorbent: the porous biosilica from three marine diatom strains of Nanofrustulum spp. (Bacillariophyta). Sci Rep 2023; 13:9168. [PMID: 37280270 PMCID: PMC10244400 DOI: 10.1038/s41598-023-36408-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 06/02/2023] [Indexed: 06/08/2023] Open
Abstract
In the present paper, for the first time the ability of the porous biosilica originated from three marine diatom strains of 'Nanofrustulum spp.' viz. N. wachnickianum (SZCZCH193), N. shiloi (SZCZM1342), N. cf. shiloi (SZCZP1809), to eliminate MB from aqueous solutions was investigated. The highest biomass was achieved under silicate enrichment for N. wachnickianum and N. shiloi (0.98 g L-1 DW and 0.93 g L-1 DW respectively), and under 15 °C for N. cf. shiloi (2.2 g L-1 DW). The siliceous skeletons of the strains were purified with hydrogen peroxide and characterized by SEM, EDS, the N2 adsorption/desorption, XRD, TGA, and ATR-FTIR. The porous biosilica (20 mg DW) obtained from the strains i.e. SZCZCH193, SZCZM1342, SZCZP1809, showed efficiency in 77.6%, 96.8%, and 98.1% of 14 mg L-1 MB removal under pH 7 for 180 min, and the maximum adsorption capacity was calculated as 8.39, 19.02, and 15.17 mg g-1, respectively. Additionally, it was possible to increase the MB removal efficiency in alkaline (pH = 11) conditions up to 99.08% for SZCZP1809 after 120 min. Modelling revealed that the adsorption of MB follows Pseudo-first order, Bangham's pore diffusion and Sips isotherm models.
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Affiliation(s)
- Aleksandra Golubeva
- Institute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16a, 70-383, Szczecin, Poland.
| | - Piya Roychoudhury
- Institute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16a, 70-383, Szczecin, Poland
| | - Przemysław Dąbek
- Institute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16a, 70-383, Szczecin, Poland
| | - Jagoda Pałczyńska
- Department of Inorganic and Coordination Chemistry, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100, Toruń, Poland
| | - Oleksandra Pryshchepa
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wileńska 4, 87-100, Toruń, Poland
| | - Piotr Piszczek
- Department of Inorganic and Coordination Chemistry, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100, Toruń, Poland
| | - Paweł Pomastowski
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wileńska 4, 87-100, Toruń, Poland
| | - Michał Gloc
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Renata Dobrucka
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
- Department of Industrial Products and Packaging Quality, Institute of Quality Science, Poznań University of Economics and Business, al. Niepodległości 10, 61-875, Poznan, Poland
| | - Agnieszka Feliczak-Guzik
- Department of Applied Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Izabela Nowak
- Department of Applied Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Krzysztof J Kurzydłowski
- Faculty of Mechanical Engineering, Bialystok University of Technology, ul. Wiejska 45 c, 15-351, Bialystok, Poland
| | - Bogusław Buszewski
- Department of Environmental Chemistry and Bioanalysis, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100, Toruń, Poland
- Prof. Jan Czochralski Kuyavian-Pomeranian Research and Development Centre, Krasińskiego 4, 87-100, Toruń, Poland
| | - Andrzej Witkowski
- Institute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16a, 70-383, Szczecin, Poland
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Dobrosielska M, Dobrucka R, Brząkalski D, Kozera P, Martyła A, Gabriel E, Kurzydłowski KJ, Przekop RE. Polyamide 11 Composites Reinforced with Diatomite Biofiller-Mechanical, Rheological and Crystallization Properties. Polymers (Basel) 2023; 15:polym15061563. [PMID: 36987343 PMCID: PMC10053006 DOI: 10.3390/polym15061563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/13/2023] [Accepted: 03/14/2023] [Indexed: 03/30/2023] Open
Abstract
Amorphic diatomaceous earth is derived from natural sources, and polyamide 11 (PA11) is produced from materials of natural origin. Both of these materials show a low harmfulness to the environment and a reduced carbon footprint. This is why the combination of these two constituents is beneficial not only to improve the physicochemical and mechanical properties of polyamide 11 but also to produce a biocomposite. For the purpose of this paper, the test biocomposite was produced by combining polyamide 11, as well as basic and pre-fractionated diatomaceous earth, which had been subjected to silanization. The produced composites were used to carry out rheological (melt flow rate-MFR), mechanical (tensile strength, bending strength, impact strength), crystallographic (X-ray Diffraction-XRD), thermal and thermo-mechanical (differential scanning calorimetry-DSC, dynamic mechanical thermal analysis-DMTA) analyses, as well as a study of hydrophobic-hydrophilic properties of the material surface (wetting angle) and imaging of the surface of the composites and the fractured specimens. The tests showed that the additive 3-aminopropyltriethoxysilane (APTES) acted as an agent that improved the elasticity of composites and the melt flow rate. In addition, the produced composites showed a hydrophilic surface profile compared to pure polylactide and polyamide 11.
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Affiliation(s)
- Marta Dobrosielska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland
| | - Renata Dobrucka
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland
- Department of Non-Food Products Quality and Packaging Development, Institute of Quality Science, Poznań University of Economics and Business, al. Niepodległości 10, 61-875 Poznań, Poland
| | - Dariusz Brząkalski
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Paulina Kozera
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland
| | - Agnieszka Martyła
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Ewa Gabriel
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Krzysztof J Kurzydłowski
- Faculty of Mechanical Engineering, Bialystok University of Technology, ul. Wiejska 45c, 15-351 Bialystok, Poland
| | - Robert E Przekop
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
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Dobrosielska M, Dobrucka R, Kozera P, Brząkalski D, Gabriel E, Głowacka J, Jałbrzykowski M, Kurzydłowski KJ, Przekop RE. Beeswax as a natural alternative to synthetic waxes for fabrication of PLA/diatomaceous earth composites. Sci Rep 2023; 13:1161. [PMID: 36670202 PMCID: PMC9859783 DOI: 10.1038/s41598-023-28435-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 01/18/2023] [Indexed: 01/22/2023] Open
Abstract
In this study, injection moulding was applied to produce biocomposites consisting of polylactide (PLA) and amorphous diatomaceous earth used as a filler at different concentrations. Natural wax and synthetic wax were added to improve processing properties, comparing the resulting biocomposites. The use of natural beeswax makes the composite environmentally friendly. The prepared composites contained 2.5, 5, 10 and 15% w/w filler. The test samples have been injection moulded. Rheological, mechanical, surface and other properties were assessed for the fabricated composites. The testing has shown that the use of wax additives has a significant influence on the mechanical properties (tensile strength, flexural strength, impact strength) and the hydrophilicity/hydrophobicity of composite surfaces. The addition of natural wax, especially at lower concentration, has a positive effect on the rheological properties of composites (melt flow rate, MFR), flexural modulus and impact strength. Different composite parameters are modified by different wax types so both natural and synthetic waxes, can be used interchangeably, depending on the required final material characteristics.
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Affiliation(s)
- Marta Dobrosielska
- grid.1035.70000000099214842Faculty of Materials Science and Engineering, Warsaw University of Technology, Ul. Wołoska 141, 02-507 Warsaw, Poland
| | - Renata Dobrucka
- grid.1035.70000000099214842Faculty of Materials Science and Engineering, Warsaw University of Technology, Ul. Wołoska 141, 02-507 Warsaw, Poland ,grid.423871.b0000 0001 0940 6494Department of Non-Food Products Quality and Packaging Development, Institute of Quality Science, Poznań University of Economics and Business, Al. Niepodległości 10, 61-875 Poznan, Poland
| | - Paulina Kozera
- grid.1035.70000000099214842Faculty of Materials Science and Engineering, Warsaw University of Technology, Ul. Wołoska 141, 02-507 Warsaw, Poland
| | - Dariusz Brząkalski
- grid.5633.30000 0001 2097 3545Faculty of Chemistry, Adam Mickiewicz University in Poznań, 8 Uniwersytetu Poznańskiego, 61-614 Poznan, Poland
| | - Ewa Gabriel
- grid.5633.30000 0001 2097 3545Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, Ul. Uniwersytetu Poznańskiego 10, 61-614 Poznan, Poland
| | - Julia Głowacka
- grid.5633.30000 0001 2097 3545Faculty of Chemistry, Adam Mickiewicz University in Poznań, 8 Uniwersytetu Poznańskiego, 61-614 Poznan, Poland
| | - Marek Jałbrzykowski
- grid.5633.30000 0001 2097 3545Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, Ul. Uniwersytetu Poznańskiego 10, 61-614 Poznan, Poland ,grid.446127.20000 0000 9787 2307Faculty of Mechanical Engineering, Bialystok University of Technology, Ul. Wiejska 45 C, 15-351 Białystok, Poland
| | - Krzysztof J. Kurzydłowski
- grid.446127.20000 0000 9787 2307Faculty of Mechanical Engineering, Bialystok University of Technology, Ul. Wiejska 45 C, 15-351 Białystok, Poland
| | - Robert E. Przekop
- grid.5633.30000 0001 2097 3545Faculty of Chemistry, Adam Mickiewicz University in Poznań, 8 Uniwersytetu Poznańskiego, 61-614 Poznan, Poland
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5
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Dobrosielska M, Dobrucka R, Kozera P, Kozera R, Kołodziejczak M, Gabriel E, Głowacka J, Jałbrzykowski M, Kurzydłowski KJ, Przekop RE. Biocomposites Based on Polyamide 11/Diatoms with Different Sized Frustules. Polymers (Basel) 2022; 14:polym14153153. [PMID: 35956665 PMCID: PMC9371175 DOI: 10.3390/polym14153153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/26/2022] [Accepted: 07/29/2022] [Indexed: 12/04/2022] Open
Abstract
Amorphous diatomite was used as a filler for a thermoplastic polymer of polyamide 11 obtained from natural sources. The diatomite particles of different sizes were previously fractionated by sedimentation to obtain powders with varying particle size distribution, including powders with or without frustule particles, crushed, uncrushed or agglomerated. Biocomposites containing 2.5, 5, 10 and 20% filler were tested for their mechanical properties, including tensile strength, flexural strength and impact strength. In addition, a particle size analysis (by Dynamic Light Scattering, DLS) was performed and the dispersion of the filler in the polymer matrix (Scanning Electron Microscopy, SEM), thermal parameters (Differential Scanning Calorimetry, DSC, and Dynamic Mechanical Analysis, DMA) were determined. Testing showed that biocomposites modified with diatomaceous earth have a higher mechanical strength than the reference system, especially with larger amounts of the filler (10 and 20%), e.g., the tensile strength of pure PA11 is about 46 MPa, while 20OB and 20OF 47.5 and 47 MPa, respectively, while an increase in max. flexural strength and flexural modulus is also observed compared to pure PA11 by a maximum of 63 and 54%, respectively Diatomaceous earth can be obtained in various ways—it is commercially available or it is possible to breed diatoms in laboratory conditions, while the use of commercially available diatomite, which contains diatoms of different sizes, eliminates the possibility of controlling mechanical parameters by filling biocomposites with a filler with the desired particle size distribution, and diatom breeding is not possible on an industrial scale. Our proposed biocomposite based on fractionated diatomaceous earth using a sedimentation process addresses the current need to produce biocomposite materials from natural sources, and moreover, the nature of the process, due to its simplicity, can be successfully used on an industrial scale.
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Affiliation(s)
- Marta Dobrosielska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (P.K.); (R.K.)
| | - Renata Dobrucka
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (P.K.); (R.K.)
- Department of Non-Food Products Quality and Packaging Development, Institute of Quality Science, Poznań University of Economics and Business, al. Niepodległości 10, 61-875 Poznań, Poland
- Correspondence: or (R.D.); or (R.E.P.)
| | - Paulina Kozera
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (P.K.); (R.K.)
| | - Rafał Kozera
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (P.K.); (R.K.)
| | - Marta Kołodziejczak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, 8 Uniwersytetu Poznańskiego, 61-614 Poznań, Poland; (M.K.); (J.G.)
| | - Ewa Gabriel
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, 10 Uniwersytetu Poznańskiego, 61-614 Poznań, Poland; (E.G.); (M.J.)
| | - Julia Głowacka
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, 8 Uniwersytetu Poznańskiego, 61-614 Poznań, Poland; (M.K.); (J.G.)
| | - Marek Jałbrzykowski
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, 10 Uniwersytetu Poznańskiego, 61-614 Poznań, Poland; (E.G.); (M.J.)
- Faculty of Mechanical Engineering, Bialystok University of Technology, ul. Wiejska 45c, 15-351 Bialystok, Poland;
| | - Krzysztof J. Kurzydłowski
- Faculty of Mechanical Engineering, Bialystok University of Technology, ul. Wiejska 45c, 15-351 Bialystok, Poland;
| | - Robert E. Przekop
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, 10 Uniwersytetu Poznańskiego, 61-614 Poznań, Poland; (E.G.); (M.J.)
- Correspondence: or (R.D.); or (R.E.P.)
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Dobrosielska M, Dobrucka R, Brząkalski D, Gloc M, Rębiś J, Głowacka J, Kurzydłowski KJ, Przekop RE. Methodological Aspects of Obtaining and Characterizing Composites Based on Biogenic Diatomaceous Silica and Epoxy Resins. Materials (Basel) 2021; 14:ma14164607. [PMID: 34443130 PMCID: PMC8400890 DOI: 10.3390/ma14164607] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/02/2021] [Accepted: 08/11/2021] [Indexed: 02/06/2023]
Abstract
Diatomaceous earth are sediments of unicellular algal skeletons with a well-defined hierarchical structure. Despite many tests conducted on systems using diatomaceous earth and epoxy resins, we can find many differences in the methods of acquisition and characteristics of the composite, which may considerably affect the results. In our study, we have conducted tests to verify the impact of the method of obtaining samples and the degassing of the composite on its mechanical properties and standard deviation. The samples were cast in glass moulds and silicone moulds and then subjected to testing for their mechanical and functional properties, imaging with the use of an optical microscope and a scanning electron microscope. The tests have shown that, for samples cast in glass moulds, there is no heterogeneity within the area of the tested sample, as in the case of samples cast in silicone moulds. Silicone moulds allow for quite effective self-degassing of the resin due to the large area-to-mass ratio, and the small remaining air vesicles have a limited effect on the mechanical properties of the samples. The filler used also played a significant role. For systems containing base and rinsed diatomite, it is clear that the degassing of mixtures increases the tensile strength. For treated diatomite, the elongation at break grew along with increasing filler concentration, while for base diatomite, the improvement was observed for flexural strength and impact strength. A non-modified epoxy resin shows a tensile strength at 19.91 MPa (silicone mould cast). At the same time, the degassed, glass mould-cast systems containing 12% of base and rinsed diatoms showed a tensile strength of 27.4 MPa and 44.7 MPa, respectively. We have also observed that the higher the filler concentration, the higher were the tensile strength values, which for the rinsed diatoms reached over 55.1 MPa and for the base diatoms were maximum of 43.8 MPa. The tests, therefore, constitute a set of guidelines and recommendations for testing with the use of fillers showing an extended inner structure.
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Affiliation(s)
- Marta Dobrosielska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (M.G.); (J.R.); (K.J.K.)
| | - Renata Dobrucka
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (M.G.); (J.R.); (K.J.K.)
- Department of Non-Food Products Quality and Packaging Development, Institute of Quality Science, Poznań University of Economics and Business, al. Niepodległości 10, 61-875 Poznań, Poland
- Correspondence: (R.D.); (R.E.P.)
| | - Dariusz Brząkalski
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, 8 Uniwersytetu Poznańskiego, 61−614 Poznań, Poland;
| | - Michał Gloc
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (M.G.); (J.R.); (K.J.K.)
| | - Janusz Rębiś
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (M.G.); (J.R.); (K.J.K.)
| | - Julia Głowacka
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznan, Poland;
| | - Krzysztof J. Kurzydłowski
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (M.G.); (J.R.); (K.J.K.)
- Faculty of Mechanical Engineering, Bialystok University of Technology, Wiejska 45c, 15-351 Bialystok, Poland
| | - Robert E. Przekop
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznan, Poland;
- Correspondence: (R.D.); (R.E.P.)
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7
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Dobrosielska M, Dobrucka R, Gloc M, Brząkalski D, Szymański M, Kurzydłowski KJ, Przekop RE. A New Method of Diatomaceous Earth Fractionation-A Bio-Raw Material Source for Epoxy-Based Composites. Materials (Basel) 2021; 14:1663. [PMID: 33800695 PMCID: PMC8037462 DOI: 10.3390/ma14071663] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 03/19/2021] [Accepted: 03/23/2021] [Indexed: 11/16/2022]
Abstract
The authors of this paper use an original method of diatomaceous earth fractionation, which allows for obtaining a filler with a specific particle size distribution. The method makes it possible to separate small, disintegrated and broken diatom frustules from those which maintained their original form in diatomaceous earth. The study covers a range of tests conducted to prove that such a separated diatomic fraction (3-30 µm) shows features different from the base diatomite (from 1 to above 40 µm) used as an epoxy resin filler. We have examined the mechanical properties of a series of diatomite/resin composites, considering the weight fraction of diatoms and the parameters of the composite production process. The studied composites of Epidian 601 epoxy resin cross-linked with amine-based curing agent Z-1 contained 0 to 70% vol. of diatoms or diatomaceous earth. Samples were produced by being casted into silicone molds in vacuum degassing conditions and, alternatively, without degassing. The results have shown that the size and morphology of the filler based on diatomaceous earth affects mechanical and rheological properties of systems based on epoxy resin. Elongation at rupture and flexural stress at rupture were both raised by up to 35%, and impact strength by up to 25%.
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Affiliation(s)
- Marta Dobrosielska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (M.G.); (K.J.K.)
| | - Renata Dobrucka
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (M.G.); (K.J.K.)
- Department of Non-Food Products Quality and Packaging Development, Institute of Quality Science, Poznań University of Economics and Business, al. Niepodległości 10, 61-875 Poznań, Poland
| | - Michał Gloc
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (M.G.); (K.J.K.)
| | - Dariusz Brząkalski
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, 8 Uniwersytetu Poznańskiego, 61-614 Poznań, Poland;
| | - Marcin Szymański
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznan, Poland;
| | - Krzysztof J. Kurzydłowski
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland; (M.D.); (M.G.); (K.J.K.)
| | - Robert E. Przekop
- Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznan, Poland;
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Sattigeri RM, Gajaria TK, Jha PK, Śpiewak P, Kurzydłowski KJ. Emergence of - s, - p- dband inversion in zincblende gold iodide topological insulator and its thermoelectric properties. J Phys Condens Matter 2021; 33:155402. [PMID: 33682681 DOI: 10.1088/1361-648x/abdce8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
We employfirst-principlescalculations to investigate the topological states (TS) and thermoelectric (TE) transport properties of three dimensional (3D) gold iodide (AuI) which belongs to the zincblende family. We explore, semi-metal (SM) to topological conductor (TC) and topological insulator (TI) phase transitions. Under pristine conditions, AuI exhibits Dirac SM nature but, under the influence of mild isotropic compressive pressure the system undergoes electronic quantum phase transition driving it into non-trivial topological state. This state exhibits Dresselhaus like band spin splitting leading to a TC state. In order to realize TI state from the SM state, we break the cubic symmetry of the system by introducing a compressive pressure along (001) crystal direction. The non-trivial TI nature of the system is characterized by the emergence of robust surface states and theZ2invariantν0= 1 which indicates a strong TI nature. A novel facet of the phase transition discussed here is, the -sand -p, -dorbital band inversion mechanism which is unconventional as compared to previously explored TI families. This mechanism unravels new path by which TI materials can be predicted. Also, we investigated the lattice and electronic contributions to the TE transport properties. We characterize the TE performance by calculating the figure of merit (zT) and find that, at room temperature (300 K) and for a fixed doping concentration (i.e.,n= 1 × 1019 cm-3) the zT is 0.55 and 0.53 for electrons and holes respectively. This is quite remarkable since, higher values of zT are generally predicted at higher temperature scales whereas, zT values as in the present case are desired at room temperatures for various energy applications. The manifestation of non-trivial TS governed by the unconventional band inversion mechanism and the TE properties of AuI make it a unique multi-functional candidate with probable thermoelectric and spintronic applications.
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Affiliation(s)
- Raghottam M Sattigeri
- Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara-390002, India
| | - Trupti K Gajaria
- Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara-390002, India
| | - Prafulla K Jha
- Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara-390002, India
| | - Piotr Śpiewak
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska Str., 02-507 Warsaw, Poland
| | - Krzysztof J Kurzydłowski
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska Str., 02-507 Warsaw, Poland
- Faculty of Mechanical Engineering, Bialystok University of Technology, 45C Wiejska Str., 15-351, Bialystok, Poland
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Sobieraj D, Wróbel JS, Rygier T, Kurzydłowski KJ, El Atwani O, Devaraj A, Martinez Saez E, Nguyen-Manh D. Chemical short-range order in derivative Cr-Ta-Ti-V-W high entropy alloys from the first-principles thermodynamic study. Phys Chem Chem Phys 2020; 22:23929-23951. [PMID: 33073813 DOI: 10.1039/d0cp03764h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of high-entropy alloys (HEAs) focuses on exploring compositional regions in multi-component systems with all alloy elements in equal or near-equal atomic concentrations. Initially it was based on the main idea that high mixing configurational entropy contributions to the alloy free energy could promote the formation of a single solid solution phase. By using the ab-initio based Cluster Expansion (CE) Hamiltonian model constructed for the quinary bcc Cr-Ta-Ti-V-W system in combination with Monte Carlo (MC) simulations, we show that the phase stability and chemical short-range order (SRO) of the equiatomic quinary and five sub-quaternary systems, as well as their derivative alloys, can dramatically change the order-disorder transition temperatures (ODTT) as a function of alloy compositions. In particular, it has been found, that the equiatomic quaternary Ta-Ti-V-W and Cr-Ta-Ti-W alloys had the lowest order-disorder transition temperature (500 K) among all the analysed equiatomic compositions. In all investigated alloy systems, the strongest chemical ordering has been observed between Cr and V, which led to the conclusion that decreasing the concentration of either Cr or V might be beneficial in terms of decreasing the ODTT. It also predicts that increasing concentration of Ti significantly decreases the ODTT. Our analysis of chemical SRO as a function of alloy composition allows to understand the microstructure evolution of HEAs as a function of temperature in excellent agreement with available experimental observations. Importantly, our free energy of mixing and SRO calculations predict that the origin of precipitates formed by Cr- and V-rich in the sub-quaternary Cr-Ta-V-W system is driven by the thermodynamics. The modelling results are in an excellent agreement with experimental observation of Cr and V segregation in the W0.38Ta0.36Cr0.15V0.11 alloy which in turns shows an exceptional radiation resistance.
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Affiliation(s)
- Damian Sobieraj
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland. and CCFE, United Kingdom Atomic Energy Authority, Abingdon OX14 3DB, UK.
| | - Jan S Wróbel
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland.
| | - Tomasz Rygier
- Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland.
| | - Krzysztof J Kurzydłowski
- Faculty of Mechanical Engineering, Białystok University of Technology, ul. Wiejska 45C, 15-351 Białystok, Poland
| | | | - Arun Devaraj
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, WA 99354, USA
| | | | - Duc Nguyen-Manh
- CCFE, United Kingdom Atomic Energy Authority, Abingdon OX14 3DB, UK. and Department of Materials, University of Oxford, Oxford OX1 3PH, UK
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Sharma V, Kagdada HL, Jha PK, Spiewak P, Kurzydłowski KJ. Halogenation of SiGe monolayers: robust changes in electronic and thermal transport. Phys Chem Chem Phys 2019; 21:19488-19498. [PMID: 31461101 DOI: 10.1039/c9cp03822a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phonon and electronic transport of buckled structured SiGe monolayer and halogenated SiGe monolayers (X2-SiGe, X = F, Cl, and Br) are investigated for the first-time using ab initio density functional theory (DFT). The phonon calculations reveal complete dynamical stability of SiGe and fluorinated (F2-SiGe) monolayers in contrast to earlier reported works, where a small magnitude of imaginary frequency in SiGe monolayer near the zone centre of the Brillouin zone (BZ) is observed. The phonon calculations of chlorinated and brominated SiGe reveal no dynamical stability even with very high convergence parameters and better computational accuracy. The lower value of lattice thermal conductivity in the case of F2-SiGe is attributed to the strong phonon anharmonic scattering and larger contribution of the three phonon process to anharmonic scattering. The semimetallic nature of the SiGe monolayer turns to semiconducting after halogenation. We have also calculated the electron relaxation time to study their precise thermoelectric parameters. The enhancement of the Seebeck coefficient and reduction in lattice thermal conductivity in the SiGe monolayer is observed after halogenation which results in the improvement of the thermoelectric figure of merit (ZT). The room temperature figure of merit, ZT, which is 0.112 for the SiGe monolayer, enhances significantly to 0.737 after addition of fluorine atoms. Our study suggests that the halogenation of two-dimensional materials can improve their thermoelectric properties.
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Affiliation(s)
- Vaishali Sharma
- Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara-390002, India.
| | - Hardik L Kagdada
- Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara-390002, India.
| | - Prafulla K Jha
- Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara-390002, India.
| | - Piotr Spiewak
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska Str., 02-507 Warsaw, Poland
| | - Krzysztof J Kurzydłowski
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska Str., 02-507 Warsaw, Poland and Faculty of Mechanical Engineering, Bialystok University of Technology, 45C Wiejska Str., 15-351, Bialystok, Poland
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11
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Chałas R, Szlązak K, Wójcik-Chęcińska I, Jaroszewicz J, Molak R, Czechowicz K, Paris S, Święszkowski W, Kurzydłowski KJ. Observations of mineralised tissues of teeth in X-ray micro-computed tomography. Folia Morphol (Warsz) 2019; 76:143-148. [PMID: 27813625 DOI: 10.5603/fm.a2016.0070] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 09/29/2016] [Accepted: 09/29/2016] [Indexed: 11/25/2022]
Abstract
BACKGROUND The one of the most recent imaging technology is X-ray microtomography which allows non-invasive three-dimensional visualisation of structures. It also offers the opportunity to conduct a comprehensive quantitative analysis of the tested objects such as measuring the shares of the various phases, determining the material density and distribution of the size of pores and particles. The aim of the paper was to present an overview on the applicability and relevance of X-ray microtomography in the study of mineralised tissues of the teeth. MATERIALS AND METHODS The article is based on the most recent and significant literature and own observations. RESULTS The use of X-ray microtomography in dentistry has recently increased and includes, inter alia, the assessment of the density of minerals in enamel and dentin, the detection of demineralisation in an artificially and a naturally induced caries, the automatic measurement of the depth of cavities in dentin, the measurement of the amount of removed dentin in preparation of carious lesions by various methods, the assessment of microleakage around fillings and fissure sealants, cortical bone density measurement, evaluation of root canal morphology, comparison of the accuracy of root canal working and filling by various methods. CONCLUSIONS X-ray microtomography offers within the analysis of mineralised tissues - complex structures of bone, teeth and biomedical materials, turn out to be indispensable since it opens new opportunities for cognitive and implementation research.
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Affiliation(s)
- R Chałas
- Department of Conservative Dentistry and Endodontics, Medical University of Lublin, Poland, Poland.
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12
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Zgłobicka I, Li Q, Gluch J, Płocińska M, Noga T, Dobosz R, Szoszkiewicz R, Witkowski A, Zschech E, Kurzydłowski KJ. Visualization of the internal structure of Didymosphenia geminata frustules using nano X-ray tomography. Sci Rep 2017; 7:9086. [PMID: 28831062 PMCID: PMC5567275 DOI: 10.1038/s41598-017-08960-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 07/20/2017] [Indexed: 11/17/2022] Open
Abstract
For the first time, the three-dimensional (3D) internal structure of naturally produced Didymosphenia geminata frustules were nondestructively visualized at sub-100 nm resolution. The well-optimized hierarchical structures of these natural organisms provide insight that is needed to design novel, environmentally friendly functional materials. Diatoms, which are widely distributed in freshwater, seawater and wet soils, are well known for their intricate, siliceous cell walls called ‘frustules’. Each type of diatom has a specific morphology with various pores, ribs, minute spines, marginal ridges and elevations. In this paper, the visualization is performed using nondestructive nano X-ray computed tomography (nano-XCT). Arbitrary cross-sections through the frustules, which can be extracted from the nano-XCT 3D data set for each direction, are validated via the destructive focused ion beam (FIB) cross-sectioning of regions of interest (ROIs) and subsequent observation by scanning electron microscopy (SEM). These 3D data are essential for understanding the functionality and potential applications of diatom cells.
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Affiliation(s)
- Izabela Zgłobicka
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska Str., 02-507, Warsaw, Poland.
| | - Qiong Li
- Fraunhofer-Institut für Keramische Technologien und Systeme IKTS, Maria-Reiche-Strasse 2, 01109, Dresden, Germany.,Dresden Center for Nanoanalysis, Technische Universität Dresden, 10 Helmholtzstraße, 01069, Dresden, Germany
| | - Jürgen Gluch
- Fraunhofer-Institut für Keramische Technologien und Systeme IKTS, Maria-Reiche-Strasse 2, 01109, Dresden, Germany
| | - Magdalena Płocińska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska Str., 02-507, Warsaw, Poland
| | - Teresa Noga
- Faculty of Biology and Agriculture, University of Rzeszów, 1 Ćwiklińskiej Str., 35-601, Rzeszów, Poland
| | - Romuald Dobosz
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska Str., 02-507, Warsaw, Poland
| | - Robert Szoszkiewicz
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska Str., 02-507, Warsaw, Poland.,Faculty of Chemistry, University of Warsaw, 1 Pasteura Str., 02-093, Warsaw, Poland
| | - Andrzej Witkowski
- Faculty of Geosciences, Paleoceanology Unit, Natural Science Research and Educational Center, University of Szczecin, 18 Mickiewicza Str., 70-383, Szczecin, Poland
| | - Ehrenfried Zschech
- Fraunhofer-Institut für Keramische Technologien und Systeme IKTS, Maria-Reiche-Strasse 2, 01109, Dresden, Germany.,Dresden Center for Nanoanalysis, Technische Universität Dresden, 10 Helmholtzstraße, 01069, Dresden, Germany
| | - Krzysztof J Kurzydłowski
- Faculty of Mechanical Engineering, Bialystok University of Technology, 45C Wiejska Str., 15-351, Bialystok, Poland
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Wolska-Pietkiewicz M, Grala A, Justyniak I, Hryciuk D, Jędrzejewska M, Grzonka J, Kurzydłowski KJ, Lewiński J. From Well-Defined Alkylzinc Phosphinates to Quantum-Sized ZnO Nanocrystals. Chemistry 2017; 23:11856-11865. [DOI: 10.1002/chem.201701823] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Indexed: 11/11/2022]
Affiliation(s)
| | - Agnieszka Grala
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Iwona Justyniak
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Dymitr Hryciuk
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Maria Jędrzejewska
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Justyna Grzonka
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
- Faculty of Materials Science and Engineering; Warsaw University of Technology; Wołoska 141 02-507 Warsaw Poland
| | - Krzysztof J. Kurzydłowski
- Faculty of Materials Science and Engineering; Warsaw University of Technology; Wołoska 141 02-507 Warsaw Poland
| | - Janusz Lewiński
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
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14
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Zgłobicka I, Chlanda A, Woźniak M, Łojkowski M, Szoszkiewicz R, Mazurkiewicz-Pawlicka M, Święszkowski W, Wyroba E, Kurzydłowski KJ. Microstructure and nanomechanical properties of single stalks from diatom Didymosphenia geminata and their change due to adsorption of selected metal ions. J Phycol 2017; 53:880-888. [PMID: 28523651 DOI: 10.1111/jpy.12548] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 05/11/2017] [Indexed: 05/21/2023]
Abstract
We present topographical and nanomechanical characterization of single Didymosphenia geminata stalk. We compared the samples before and after adsorption of metal ions from freshwater samples. Transmission electron microscopy studies of single stalk cross-sections have shown three distinct layers and an additional thin extra coat on the external layer (called "EL"). Using scanning electron microscopy and atomic force microscopy (AFM), we found that topography of single stalks after ionic adsorption differed significantly from topography of pristine stalks. AFM nanoindentation studies in ambient conditions yielded elastic moduli of 214 ± 170 MPa for pristine stalks and 294 ± 108 MPa for stalks after ionic adsorption. Statistical tests showed that those results were significantly different. We conducted only preliminary comparisons between ionic adsorption of several stalks in air and in water. While the stalks with ions were on average stiffer than the pristine stalks in air, they became more compliant than the pristine stalks in water. We also heated the stalks and detected EL softening at 50°C ± 15°C. AFM nanoindentation in air on the softened samples yielded elastic moduli of 26 ± 9 MPa for pristine samples and 43 ± 22 MPa for stalks with absorbed metal ions. Substantial decrease of the EL elastic moduli after heating was expected. Significantly different elastic moduli for the samples after ionic adsorption in both cases (i.e., for heated and nonheated samples), as well as behavior of the stalks immersed in water, point to permanent structural EL changes due to ions.
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Affiliation(s)
- Izabela Zgłobicka
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Adrian Chlanda
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Michał Woźniak
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Maciej Łojkowski
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Robert Szoszkiewicz
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Marta Mazurkiewicz-Pawlicka
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645, Warsaw, Poland
| | - Wojciech Święszkowski
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Elżbieta Wyroba
- Nencki Institute of Experimental Biology of the Polish Academy of Sciences, Pasteura 3, 02-093, Warsaw, Poland
| | - Krzysztof J Kurzydłowski
- Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
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15
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Wróbel JS, Nguyen-Manh D, Kurzydłowski KJ, Dudarev SL. A first-principles model for anomalous segregation in dilute ternary tungsten-rhenium-vacancy alloys. J Phys Condens Matter 2017; 29:145403. [PMID: 28177296 DOI: 10.1088/1361-648x/aa5f37] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The occurrence of segregation in dilute alloys under irradiation is a highly unusual phenomenon that has recently attracted attention, stimulated by the interest in the fundamental properties of alloys as well as by their applications. The fact that solute atoms segregate in alloys that, according to equilibrium thermodynamics, should exhibit full solubility, has significant practical implications, as the formation of precipitates strongly affects physical and mechanical properties of alloys. A lattice Hamiltonian, generalizing the so-called 'ABV' Ising model and including collective many-body inter-atomic interactions, has been developed to treat rhenium solute atoms and vacancies in tungsten as components of a ternary alloy. The phase stability of W-Re-vacancy alloys is assessed using a combination of density functional theory (DFT) calculations and cluster expansion (CE) simulations. The accuracy of CE parametrization is evaluated against the DFT data, and the cross-validation error is found to be less than 4.2 meV/atom. The free energy of W-Re-vacancy ternary alloys is computed as a function of temperature using quasi-canonical Monte Carlo simulations, using effective two, three and four-body interactions. In the low rhenium concentration range (<5 at.[Formula: see text]Re), solute segregation is found to occur in the form of voids decorated by Re atoms. These vacancy-rhenium clusters remain stable over a broad temperature range from 800 K to 1600 K. At lower temperatures, simulations predict the formation of Re-rich rhenium-vacancy clusters taking the form of sponge-like configurations that contain from 30 to 50 at.[Formula: see text]Re. The anomalous vacancy-mediated segregation of Re atoms in W can be rationalized by analyzing binding energy dependence as a function of Re to vacancy ratio as well as chemical Re-W and Re-vacancy interactions and short-range order parameters. DFT calculations show that rhenium-vacancy binding energies can be as high as 1.5 eV if the rhenium/vacancy ratio is in the range from 2.4 to 6.6. The predicted Re clustering agrees with experimental observations of precipitation in self-ion irradiated W-2[Formula: see text] Re alloys and neutron-irradiated alloys containing 1.4 at.[Formula: see text]Re.
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Affiliation(s)
- J S Wróbel
- CCFE, UK Atomic Energy Authority, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom. Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, Poland
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16
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Osica I, Imamura G, Shiba K, Ji Q, Shrestha LK, Hill JP, Kurzydłowski KJ, Yoshikawa G, Ariga K. Highly Networked Capsular Silica-Porphyrin Hybrid Nanostructures as Efficient Materials for Acetone Vapor Sensing. ACS Appl Mater Interfaces 2017; 9:9945-9954. [PMID: 28234457 DOI: 10.1021/acsami.6b15680] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The development of novel functional nanomaterials is critically important for the further evolution of advanced chemical sensor technology. For this purpose, metalloporphyrins offer unique binding properties as host molecules that can be tailored at the synthetic level and potentially improved by incorporation into inorganic materials. In this work, we present a novel hybrid nanosystem based on a highly networked silica nanoarchitecture conjugated through covalent bonding to an organic functional molecule, a tetraphenylporphyrin derivative, and its metal complexes. The sensing properties of the new hybrid materials were studied using a nanomechanical membrane-type surface stress sensor (MSS) with acetone and nitric oxide as model analytes. This hybrid inorganic-organic MSS-based system exhibited excellent performance for acetone sensing at low operating temperatures (37 °C), making it available for diagnostic monitoring. The hybridization of an inorganic substrate of large surface area with organic molecules of various functionalities results in sub-ppm detection of acetone vapors. Acetone is an important metabolite in lipid metabolism and can also be present in industrial environments at deleterious levels. Therefore, we believe that the analysis system presented by our work represents an excellent opportunity for the development of a portable, easy-to-use device for monitoring local acetone levels.
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Affiliation(s)
- Izabela Osica
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba 305-0044, Japan
- Faculty of Materials Science and Engineering, Warsaw University of Technology , Woloska 141, 02-507 Warsaw, Poland
| | - Gaku Imamura
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba 305-0044, Japan
- International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS) , Tsukuba, Ibaraki 305-0044, Japan
| | - Kota Shiba
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Qingmin Ji
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba 305-0044, Japan
- Herbert Gleiter Institute for Nanoscience, Nanjing University of Science and Technology , 200 Xiaolingwei, Nanjing, 210094, China
| | - Lok Kumar Shrestha
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Jonathan P Hill
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Krzysztof J Kurzydłowski
- Faculty of Materials Science and Engineering, Warsaw University of Technology , Woloska 141, 02-507 Warsaw, Poland
| | - Genki Yoshikawa
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba 305-0044, Japan
- Materials Science and Engineering, Graduate School of Pure and Applied Science, University of Tsukuba , Tennodai 1-1-1 Tsukuba, Ibaraki 305-8571, Japan
| | - Katsuhiko Ariga
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba 305-0044, Japan
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17
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Li CL, Ashworth MP, Witkowski A, Lobban CS, Zgłobicka I, Kurzydłowski KJ, Qin S. Ultrastructural and molecular characterization of diversity among small araphid diatoms all lacking rimoportulae. I. Five new genera, eight new species. J Phycol 2016; 52:1018-1036. [PMID: 27549783 DOI: 10.1111/jpy.12460] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 07/23/2016] [Indexed: 06/06/2023]
Abstract
Pennate diatoms are important contributors to primary production in freshwater and marine habitats. But the extent of their diversity, ecology, and evolution is still largely unknown. This is particularly evident among the clades of pennate diatoms without raphe slits, whose diversity is likely underestimated due to their small size and features that can be difficult to discern under light microscopy. In this study, we described five new araphid genera with eight new species based on morphological observations (light and electron microscopy) and molecular data (nuclear-encoded small subunit ribosomal RNA and chloroplast-encoded rbcL and psbC): Serratifera varisterna, Hendeyella rhombica, H. dimeregrammopsis, H. lineata, Psammotaenia lanceolata, Castoridens striata, C. hyalina, and Cratericulifera shandongensis. We also transferred Dimeregramma dubium to Hendeyella dubia. Phylogenetic analysis of the molecular data revealed that all the newly established taxa fell into a monophyletic group, with Fragilariforma virescens located at the base. The group was composed by two subclades: one comprising Castoridens, Cratericulifera, and Plagiostriata, and the larger including also the rest of the new genera plus some of the smallest known diatoms, such as Nanofrustulum, Opephora, Pseudostaurosira, Staurosirella, and Staurosira with a high level of support. This study enhances the general knowledge on the phylogeny and biodiversity of a group of small araphid diatoms that have been generally poorly described both by electron microscopy and DNA sequence data.
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Affiliation(s)
- Chun L Li
- Palaeoceanology Unit, Faculty of Geosciences, Natural Sciences Research and Educational Center, University of Szczecin, Mickiewicza 16a, PL-70-383, Szczecin, Poland
| | - Matt P Ashworth
- Department of Integrative Biology, University of Texas at Austin, 205 W. 24th St. MS C0930, Austin, Texas, 78712, USA
| | - Andrzej Witkowski
- Palaeoceanology Unit, Faculty of Geosciences, Natural Sciences Research and Educational Center, University of Szczecin, Mickiewicza 16a, PL-70-383, Szczecin, Poland
| | | | - Izabela Zgłobicka
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Krzysztof J Kurzydłowski
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Song Qin
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 17 Chunhui Rd, 264003, Yantai, China
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18
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Chałas R, Wójcik-Chęcińska I, Woźniak MJ, Grzonka J, Święszkowski W, Kurzydłowski KJ. [Dental plaque as a biofilm - a risk in oral cavity and methods to prevent]. ACTA ACUST UNITED AC 2015; 69:1140-8. [PMID: 26561840 DOI: 10.5604/17322693.1173925] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Bacteria living constantly in the oral cavity are in the form of a biofilm. The biofilm formed on a solid base such as the enamel of the teeth, fillings, restorations, orthodontic appliances or obturators is dental plaque. Disturbance of homeostasis of biofilm, excessive growth or increase in the number of acid-forming bacteria leads to the development of the most common diseases of the oral cavity, i.e. dental caries and periodontal disease. The presence of bacterial biofilm on the walls of the root canal or at the top of the root on an outer wall leads to complications and failure in endodontic treatment. The aim of the study was to present the latest information on the occurrence, development and the role of biofilm in the etiopathogenesis of oral diseases and its control. Based on the literature analyzed, it can be concluded that the biofilm, due to its complex structure and numerous mechanisms of bacteria adaptation, is an effective barrier against the traditional agents with antibacterial properties. There are now great hopes for nanotechnology as an innovative method for obtaining new structures of nanometric size and different properties than source materials. The use of antibacterial properties of nano-silver used in dentistry significantly reduces the metabolic activity and the number of colony forming bacteria and lactic acid production in the biofilm.
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Affiliation(s)
- Renata Chałas
- Katedra i Zakład Stomatologii Zachowawczej z Endodoncją Uniwersytetu Medycznego w Lublinie, ul. Karmelicka 7, 20-081 Lublin, Polska
| | - Ilona Wójcik-Chęcińska
- Katedra i Zakład Stomatologii Zachowawczej z Endodoncją Uniwersytetu Medycznego w Lublinie, ul. Karmelicka 7, 20-081 Lublin, Polska
| | - Michał J Woźniak
- Wydział Inżynierii Materiałowej Politechniki Warszawskiej, ul. Wołoska 141, 02-507 Warszawa, Polska
| | - Justyna Grzonka
- Katedra i Zakład Stomatologii Zachowawczej z Endodoncją Uniwersytetu Medycznego w Lublinie, ul. Karmelicka 7, 20-081 Lublin, Polska
| | - Wojciech Święszkowski
- Wydział Inżynierii Materiałowej Politechniki Warszawskiej, ul. Wołoska 141, 02-507 Warszawa, Polska
| | - Krzysztof J Kurzydłowski
- Wydział Inżynierii Materiałowej Politechniki Warszawskiej, ul. Wołoska 141, 02-507 Warszawa, Polska
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Sokołowski K, Justyniak I, Bury W, Grzonka J, Kaszkur Z, Mąkolski Ł, Dutkiewicz M, Lewalska A, Krajewska E, Kubicki D, Wójcik K, Kurzydłowski KJ, Lewiński J. tert-Butyl(tert-butoxy)zinc Hydroxides: Hybrid Models for Single-Source Precursors of ZnO Nanocrystals. Chemistry 2015; 21:5488-95. [DOI: 10.1002/chem.201406245] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Indexed: 11/08/2022]
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20
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Witkowski A, Barka F, Mann DG, Li C, Weisenborn JLF, Ashworth MP, Kurzydłowski KJ, Zgłobicka I, Dobosz S. A Description of Biremis panamae sp. nov., a New Diatom Species from the Marine Littoral, with an Account of the Phylogenetic Position of Biremis D.G. Mann et E.J. Cox (Bacillariophyceae). PLoS One 2014; 9:e114508. [PMID: 25494095 PMCID: PMC4262420 DOI: 10.1371/journal.pone.0114508] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 11/05/2014] [Indexed: 11/18/2022] Open
Abstract
Here we present a formal description of Biremis panamae Barka, Witkowski et Weisenborn sp. nov., which was isolated from the marine littoral environment of the Pacific Ocean coast of Panama. The description is based on morphology (light and electron microscopy) and the rbcL, psbC and SSU sequences of one clone of this species. The new species is included in Biremis due to its morphological features; i.e. two marginal rows of foramina, chambered striae, and girdle composed of numerous punctate copulae. The new species also possesses a striated valve face which is not seen in most known representatives of marine littoral Biremis species. In this study we also present the relationship of Biremis to other taxa using morphology, DNA sequence data and observations of auxosporulation. Our results based on these three sources point to an evolutionary relationship between Biremis, Neidium and Scoliopleura. The unusual silicified incunabular caps present in them are known otherwise only in Muelleria, which is probably related to the Neidiaceae and Scoliotropidaceae. We also discuss the relationship between Biremis and the recently described Labellicula and Olifantiella.
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Affiliation(s)
- Andrzej Witkowski
- Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Mickiewicza 18, PL-70-383, Szczecin, Poland
- * E-mail:
| | - Frederik Barka
- Institute of Molecular Biosciences, Goethe University, D-60438 Frankfurt am Main, Germany
| | - David G. Mann
- Royal Botanic Garden Edinburgh, 20A Inverleith Row, Edinburgh EH3 5LR, Scotland, United Kingdom
- Aquatic Ecosystems, Institute for Food and Agricultural Research and Technology (IRTA), Crta de Poble Nou Km 5.5, E-43540 Sant Carles de la Ràpita, Catalunya, Spain
| | - Chunlian Li
- Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Mickiewicza 18, PL-70-383, Szczecin, Poland
| | - Jascha L. F. Weisenborn
- Institute of Ecology, Evolution and Diversity, Goethe University, D-60438 Frankfurt am Main, Germany
| | - Matt P. Ashworth
- Section of Integrative Biology, Biological Laboratories, University of Texas at Austin, Austin, Texas, United States of America
| | | | - Izabela Zgłobicka
- Faculty of Engineering and Material Science, Warsaw University of Technology, Warsaw, Poland
| | - Sławomir Dobosz
- Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Mickiewicza 18, PL-70-383, Szczecin, Poland
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21
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Ciecierska E, Boczkowska A, Kurzydłowski KJ. Characterization of polymer based nanocomposites with carbon nanotubes. J Nanosci Nanotechnol 2014; 14:2690-2699. [PMID: 24734681 DOI: 10.1166/jnn.2014.8584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The paper concerns investigation of the processing methods influence on the electrical, thermal and mechanical properties of the polymer matrix nanocomposites with carbon nanotubes (CNTs) as a filler. The focus is put on the relation between microstructure and properties dependently on the parameters of mixing, epoxy matrix curing parameters, neat epoxy resin viscosity, carbon nanotubes modified with different functional groups, as well as carbon nanotubes weight fraction. Nanocomposites with the CNTs varied from 0.05 to 5 wt.% were obtained by dispersion methods such as: mechanical stirring, ultrasonication and combination both of them, as well as calendaring. Three epoxy resin systems were tested, varied in viscosity and curing temperature. Also CNTs nonmodified and modified with amino, carboxyl and hydroxyl groups were used. The choice of the best epoxy resin system and kind of CNTs for fabrication of conductive nanocomposites was done. The lower neat epoxy resin viscosity the better dispersion of CNTs can be achieved. The distribution of CNTs in the epoxy matrix was evaluated using high resolution scanning electron microscopy, supported by image analysis. Electrical conductivity, as well as thermal stability and thermodynamic properties of polymers filled with CNTs were determined. Activation energy of decomposition process was calculated from thermogravimetric curves by Flynn-Wall-Ozawa method. The deterioration of thermal stability was obtained, while mechanical properties increase with the CNTs weight fraction growth up to 0.1%. Calendaring was found as the best method of CNTs dispersion in the polymer matrix.
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22
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Kruszewski MJ, Ciupiński Ł, Rosiński M, Michalski A, Kurzydłowski KJ. Pulse plasma sintering of a tungsten/steel divertor module. Fusion Engineering and Design 2013. [DOI: 10.1016/j.fusengdes.2013.05.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Ehrlich H, Simon P, Motylenko M, Wysokowski M, Bazhenov VV, Galli R, Stelling AL, Stawski D, Ilan M, Stöcker H, Abendroth B, Born R, Jesionowski T, Kurzydłowski KJ, Meyer DC. Extreme Biomimetics: formation of zirconium dioxide nanophase using chitinous scaffolds under hydrothermal conditions. J Mater Chem B 2013; 1:5092-5099. [PMID: 32261100 DOI: 10.1039/c3tb20676a] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Chitinous scaffolds isolated from the skeleton of marine sponge Aplysina cauliformis were used as a template for the in vitro formation of zirconium dioxide nanophase from ammonium zirconium(iv) carbonate (AZC) under extreme conditions (150 °C). These novel zirconia-chitin based composites were prepared for the first time using hydrothermal synthesis, and were thoroughly characterized using a plethora of analytical methods. The thermostability of the chitinous 3D matrix makes it ideal for use in the hydrothermal synthesis of monoclinic nanostructured zirconium dioxide from precursors like AZC. These zirconium-chitin composites have a high potential for use in a broad range of applications ranging from synthetic catalysis to biocompatible materials for bone and dental repair. The synthetic methods presented in this work show an attractive route for producing monoclinic zirconium dioxide on a 3D biocompatible scaffold with ease.
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Affiliation(s)
- Hermann Ehrlich
- Institute of Experimental Physics, TU Bergakademie Freiberg, Liepziger 23, 09599 Freiberg, Germany.
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24
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Grzonka J, Vereshchak V, Shevchenko O, Vasylyev O, Kurzydłowski KJ. Characterization of Sc₂O₃&CeO₂-stabilized ZrO₂ powders via co-precipitation or hydrothermal synthesis. Microsc Microanal 2013; 19 Suppl 5:29-32. [PMID: 23920169 DOI: 10.1017/s1431927613012270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
As the presence of Sc₂O₃ and CeO₂ is known to largely enhance the ionic conductivity in the temperature range of 600-800°C, compared with the conventional yttria-stabilized ZrO₂, Sc₂O₃&CeO₂-stabilized ZrO₂ provide its applicability as electrolytes in solid oxide fuel cells. The current study introduces the methodology to synthesize Sc₂O₃&CeO₂-stabilized ZrO₂ powders by using co-precipitation technique or high-temperature hydrothermal reaction, and further describes the structural characterization of the zirconia powders synthesized by the above-mentioned two methods. The co-precipitation technique was found to allow obtaining powders of cubic phase, whereas high-temperature hydrothermal synthesis results in the presence of a monoclinic phase as well. The scanning transmission electron microscope observations also confirm that the size of the synthesized ZrO₂ powders in this study is found to be much smaller than that of commercially available powders.
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Affiliation(s)
- Justyna Grzonka
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland.
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25
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Płoch D, Płociński T, Gebicki W, Sheregii EM, Kurzydłowski KJ. Structural properties, interface modes and magnetophonon resonances in the double quantum well structure. J Nanosci Nanotechnol 2013; 13:4025-4030. [PMID: 23862443 DOI: 10.1166/jnn.2013.7180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The Double Quantum Well structure (DQWs) of special engineering providing a rectangular shape of QW's, is investigated. The Scanning Transmission Electron Microscopy (STEM) observations confirmed a high quality of interfaces and smooth change of the In-content in a rectangular shape QW. Micro-Raman experiment enabled to detect interface phonons in DQWs which are manifested in Magnetophonon Resonance. This contribution of interface phonons in the electron magneto-transport is important because as could be expected, the role of these phonons will increase in case of electron transport in the Double Quantum Wires fabricated from DQWs investigated.
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Affiliation(s)
- D Płoch
- Centre of Microelectronics and Nanotechnology, University of Rzeszow, Rejtana 16a, 35-959 Rzeszow, Poland
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26
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Wysokowski M, Motylenko M, Stöcker H, Bazhenov VV, Langer E, Dobrowolska A, Czaczyk K, Galli R, Stelling AL, Behm T, Klapiszewski Ł, Ambrożewicz D, Nowacka M, Molodtsov SL, Abendroth B, Meyer DC, Kurzydłowski KJ, Jesionowski T, Ehrlich H. An extreme biomimetic approach: hydrothermal synthesis of β-chitin/ZnO nanostructured composites. J Mater Chem B 2013; 1:6469-6476. [DOI: 10.1039/c3tb21186j] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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27
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Wróbel P, Stefaniuk T, Antosiewicz TJ, Libura A, Nowak G, Wejrzanowski T, Andrzejczuk M, Kurzydłowski KJ, Jedrzejewski K, Szoplik T. Fabrication of corrugated Ge-doped silica fibers. Opt Express 2012; 20:14508-14513. [PMID: 22714512 DOI: 10.1364/oe.20.014508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We present a method of fabricating Ge-doped SiO2 fibers with corrugations around their full circumference for a desired length in the longitudinal direction. The procedure comprises three steps: hydrogenation of Ge-doped SiO2 fibers to increase photosensitivity, recording of Bragg gratings with ultraviolet light to achieve modulation of refractive index, and chemical etching. Finite-length, radially corrugated fibers may be used as couplers. Corrugated tapered fibers are used as high energy throughput probes in scanning near-field optical microscopy.
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Affiliation(s)
- P Wróbel
- University of Warsaw, Faculty of Physics, Pasteura 7, 02-093 Warsaw, Poland.
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28
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Heljak MK, Swięszkowski W, Lam CXF, Hutmacher DW, Kurzydłowski KJ. Evolutionary design of bone scaffolds with reference to material selection. Int J Numer Method Biomed Eng 2012; 28:789-800. [PMID: 25364851 DOI: 10.1002/cnm.2487] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 03/29/2012] [Accepted: 04/03/2012] [Indexed: 06/04/2023]
Abstract
The favourable scaffold for bone tissue engineering should have desired characteristic features, such as adequate mechanical strength and three-dimensional open porosity, which guarantee a suitable environment for tissue regeneration. In fact, the design of such complex structures like bone scaffolds is a challenge for investigators. One of the aims is to achieve the best possible mechanical strength-degradation rate ratio. In this paper we attempt to use numerical modelling to evaluate material properties for designing bone tissue engineering scaffold fabricated via the fused deposition modelling technique. For our studies the standard genetic algorithm was used, which is an efficient method of discrete optimization. For the fused deposition modelling scaffold, each individual strut is scrutinized for its role in the architecture and structural support it provides for the scaffold, and its contribution to the overall scaffold was studied. The goal of the study was to create a numerical tool that could help to acquire the desired behaviour of tissue engineered scaffolds and our results showed that this could be achieved efficiently by using different materials for individual struts. To represent a great number of ways in which scaffold mechanical function loss could proceed, the exemplary set of different desirable scaffold stiffness loss function was chosen.
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Affiliation(s)
- M K Heljak
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Poland
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29
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Rosiński M, Kruszewski MJ, Michalski A, Fortuna-Zaleśna E, Ciupiński Ł, Kurzydłowski KJ. W/steel joint fabrication using the pulse plasma sintering (PPS) method. Fusion Engineering and Design 2011. [DOI: 10.1016/j.fusengdes.2011.01.083] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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Bury W, Krajewska E, Dutkiewicz M, Sokołowski K, Justyniak I, Kaszkur Z, Kurzydłowski KJ, Płociński T, Lewiński J. tert-Butylzinc hydroxide as an efficient predesigned precursor of ZnO nanoparticles. Chem Commun (Camb) 2011; 47:5467-9. [DOI: 10.1039/c1cc11328c] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of tBu2Zn with H2O leads to the unprecedented hexameric tert-butylzinc hydroxide which acts as an ideal predesigned precursor of ZnO nanoparticles.
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Affiliation(s)
- Wojciech Bury
- Faculty of Chemistry
- Warsaw University of Technology
- 00-664 Warsaw
- Poland
| | | | - Michał Dutkiewicz
- Faculty of Chemistry
- Warsaw University of Technology
- 00-664 Warsaw
- Poland
| | - Kamil Sokołowski
- Institute of Physical Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - Iwona Justyniak
- Institute of Physical Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - Zbigniew Kaszkur
- Institute of Physical Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | | | - Tomasz Płociński
- Faculty of Materials Science and Engineering
- Warsaw University of Technology
- 02-507 Warsaw
- Poland
| | - Janusz Lewiński
- Faculty of Chemistry
- Warsaw University of Technology
- 00-664 Warsaw
- Poland
- Institute of Physical Chemistry
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31
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Woźniak P, Bil M, Ryszkowska J, Wychowański P, Wróbel E, Ratajska A, Hoser G, Przybylski J, Kurzydłowski KJ, Lewandowska-Szumieł M. Candidate bone-tissue-engineered product based on human-bone-derived cells and polyurethane scaffold. Acta Biomater 2010; 6:2484-93. [PMID: 19837193 DOI: 10.1016/j.actbio.2009.10.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2009] [Revised: 10/10/2009] [Accepted: 10/13/2009] [Indexed: 01/30/2023]
Abstract
Biodegradable polyurethanes (PURs) have recently been investigated as candidate materials for bone regenerative medicine. There are promising reports documenting the biocompatibility of selected PURs in vivo and the tolerance of certain cells toward PURs in vitro - potentially to be used as scaffolds for tissue-engineered products (TEPs). The aim of the present study was to take a step forward and create a TEP using human osteogenic cells and a polyurethane scaffold, and to evaluate the quality of the obtained TEP in vivo. Human-bone-derived cells (HBDCs) were seeded and cultured on polyurethane scaffolds in a bioreactor for 14 days. The TEP examination in vitro was based on the evaluation of cell number, cell phenotype and cell distribution within the scaffold. TEPs and control samples (scaffolds without cells) were implanted subcutaneously into SCID mice for 4 and 13 weeks. Explants harvested from the animals were examined using histological and immunohistochemical methods. They were also tested in mechanical trials. It was found that dynamic conditions for cell seeding and culture enable homogeneous distribution, maintaining the proliferative potential and osteogenic phenotype of the HBDCs cultured on polyurethane scaffolds. It was also found that HBDCs implanted as a component of TEP survived and kept their ability to produce the specific human bone extracellular matrix, which resulted in higher mechanical properties of the harvested explants when preseeded with HBDCs. The whole system, including the investigated PUR scaffold and the method of human cell seeding and culture, is recommended as a candidate bone TEP.
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Affiliation(s)
- Piotr Woźniak
- Department of Biophysics and Human Physiology, Medical University of Warsaw, Warsaw, Poland
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32
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Andrzejczuk M, Siejka-Kulczyk J, Lewandowska M, Kurzydłowski KJ. Microstructure investigations of dental composite samples prepared by focused ion beam technique. J Microsc 2010; 237:427-30. [PMID: 20500411 DOI: 10.1111/j.1365-2818.2009.03278.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this study, microstructures of dental composites were observed using high resolution scanning transmission electron microscopy (HR STEM). Samples for these observations were prepared by focused ion beam system. Two kinds of dental composites were investigated: (1) polymer-ceramic composite containing nano-sized ceramic fillers and (2) ceramic-polymer composite based on the nano-structured yttrium stabilized zirconia. The first composite is a popular material for dental fillings whereas the second is used for the fabrication of fixed partial dentures. The results are discussed in terms of the evaluation of fabrication process of the composites.
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Affiliation(s)
- M Andrzejczuk
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Warszawa, Poland.
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33
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Krawczynska AT, Lewandowska M, Kuziak R, Kurzydłowski KJ. Recrystallization and grain growth in nano-structured austenitic stainless steel under electric current heating. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pssc.200983377] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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34
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Darowicki K, Zieliński A, J Kurzydłowski K. Application of dynamic impedance spectroscopy to atomic force microscopy. Sci Technol Adv Mater 2008; 9:045006. [PMID: 27878034 PMCID: PMC5099648 DOI: 10.1088/1468-6996/9/4/045006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2008] [Revised: 11/25/2008] [Accepted: 08/03/2008] [Indexed: 05/16/2023]
Abstract
Atomic force microscopy (AFM) is a universal imaging technique, while impedance spectroscopy is a fundamental method of determining the electrical properties of materials. It is useful to combine those techniques to obtain the spatial distribution of an impedance vector. This paper proposes a new combining approach utilizing multifrequency scanning and simultaneous AFM scanning of an investigated surface.
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Affiliation(s)
- Kazimierz Darowicki
- Department of Electrochemistry, Corrosion and Materials Engineering, Gdańsk University of Technology, Narutowicza Street 11/12, 80-952 Gdańsk Wrzeszcz, Poland
| | - Artur Zieliński
- Department of Electrochemistry, Corrosion and Materials Engineering, Gdańsk University of Technology, Narutowicza Street 11/12, 80-952 Gdańsk Wrzeszcz, Poland
| | - Krzysztof J Kurzydłowski
- Department of Materials Engineering, Warsaw University of Technology, Wołoska Street 144, 02-507 Warsaw, Poland
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35
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Abstract
The present work reports results of studies of corrosion resistance of pure nano-Ti-Grade 2 after hydrostatic extrusion. The grain size of the examined samples was below 90 nm. Surface analytical technique including AES combined with Ar(+) ion sputtering, were used to investigate the chemical composition and thicknesses of the oxides formed on nano-Ti. It has been found that the grain size of the titanium substrate did not influence the thickness of oxide formed on the titanium. The thickness of the oxide observed on the titanium samples before and after hydrostatic extrusion was about 6 nm. Tests carried out in a NaCl solution revealed a slightly lower corrosion resistance of nano-Ti in comparison with the titanium with micrometric grain size.
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Affiliation(s)
- H Garbacz
- Warsaw University of Technology, Faculty of Materials Science and Technology, Woloska 141, 02-507 Warsaw, Poland.
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36
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Narkiewicz U, Podsiadły M, Arabczyk W, Woźniak MJ, Kurzydłowski KJ. Carbon-coated cobalt nanoparticles. Materials Science and Engineering: C 2007. [DOI: 10.1016/j.msec.2006.08.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lewandowska M, Włodkowska M, Olkowski R, Roguska A, Polak B, Pisarek M, Lewandowska-Szumieł M, Kurzydłowski KJ. Chemical Surface Modifications of Titanium Implants. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/masy.200750717] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Lewandowska M, Roguska A, Pisarek M, Polak B, Janik-Czachor M, Kurzydłowski KJ. Morphology and chemical characterization of Ti surfaces modified for biomedical applications. ACTA ACUST UNITED AC 2007; 24:438-42. [PMID: 17768086 DOI: 10.1016/j.bioeng.2007.07.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The aim of the present work is to characterize in detail the chemical composition and morphology of titanium surfaces subjected to various environments. Modifications consisted of exposure of Ti to acidic, alkaline or polymer solutions. Such modifications result in chemical and/or morphological changes in the Ti surface. Special attention has been given to identifying the factors influencing cell adhesion and growth. SEM examinations provided morphological characterization of the Ti samples. Surface analytical techniques such as AES or XPS combined with Ar(+) ion sputtering allowed examination of the chemical properties of the Ti surface after chemical pretreatments and investigating the chemical composition of the Ti oxide layer. Raman spectroscopy investigations allowed determination of the crystalline phases of the Ti-oxide layers and characterization of the dextran-modified surface. The results show large differences in the morphology of Ti pretreated with different procedures whereas only minor differences in the chemistry of the surfaces were found. High-resolution Auger investigations have revealed that all the chemical modifications of Ti surfaces resulted in the formation of a titanium oxide layer. XPS confirmed that TiO(2) is the main component of the chemically modified Ti surface. The Raman spectroscopy investigations showed that the titanium surface with a dextran coating is rich in hydroxyl groups. All the surfaces investigated exhibit a hydrophilic character. The possible influence of various surface features on surface biocompatibility is discussed.
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Affiliation(s)
- M Lewandowska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Woloska 141, 02-507 Warsaw, Poland.
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Garbacz H, Lewandowska M, Pachla W, Kurzydłowski KJ. Structural and mechanical properties of nanocrystalline titanium and 316LVM steel processed by hydrostatic extrusion. J Microsc 2006; 223:272-4. [PMID: 17059548 DOI: 10.1111/j.1365-2818.2006.01646.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The aim of the present study was to examine the potential of hydrostatic extrusion for the fabrication of high-strength materials for medical applications. The materials examined were 316LVM steel and technically pure titanium. The microstructures and mechanical properties of the materials before and after hydrostatic extrusion were analysed. It was found that the hydrostatic extrusion process resulted in a substantial refinement of the material microstructures. The refinement of the microstructure was accompanied by an improvement of the mechanical properties, such as the microhardness and yield stress.
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Affiliation(s)
- Halina Garbacz
- Warsaw University of Technology, Faculty of Materials Science and Engineering, 02-507 Warsaw, Wołoska 141, Poland.
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Siejka-Kulczyk J, Lewandowska M, Raczyńska M, Jodkowska E, Kurzydłowski KJ. Scanning electron microscopy investigation of tooth/filling bonding. e-Polymers 2005. [DOI: 10.1515/epoly.2005.5.1.394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractScanning electron microscopy (SEM) investigations have been conducted to determine the influence of selected material on tissue/material bonding. Extracted human teeth were used in this study. Several resin composites were tested as dental fillings. To reveal the structure of the tissue/filling interface, the teeth were cut parallel to the long axis. Bonding quality was determined by direct SEM observation and microanalysis with X-ray energy spectrometry (EDX). The investigated materials show good bonding with enamel.
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Affiliation(s)
- Joanna Siejka-Kulczyk
- 1Warsaw University of Technology, Faculty of Materials Science and Engineering, ul. Woloska 141, 02-507 Warsaw, Poland
| | - Małgorzata Lewandowska
- 1Warsaw University of Technology, Faculty of Materials Science and Engineering, ul. Woloska 141, 02-507 Warsaw, Poland
| | - Marta Raczyńska
- 2Medical University of Warsaw, Division of Restorative Dentistry
| | | | - Krzysztof J. Kurzydłowski
- 1Warsaw University of Technology, Faculty of Materials Science and Engineering, ul. Woloska 141, 02-507 Warsaw, Poland
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