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Scarisoreanu ND, Craciun F, Ion V, Birjega R, Bercea A, Dinca V, Dinescu M, Sima LE, Icriverzi M, Roseanu A, Gruionu L, Gruionu G. Lead-Free Piezoelectric (Ba,Ca)(Zr,Ti)O 3 Thin Films for Biocompatible and Flexible Devices. ACS Appl Mater Interfaces 2017; 9:266-278. [PMID: 28009160 DOI: 10.1021/acsami.6b14774] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we report the synthesis of functional biocompatible piezoelectric (1 - x)Ba(Ti0.8Zr0.2)TiO3-x(Ba0.7Ca0.3)TiO3, x = 0.45 (BCZT45), thin films with high piezoelectric properties. Pulsed-laser-based techniques, classical pulsed-laser deposition and matrix-assisted pulsed-laser evaporation, were used to synthesize the BCZT45 thin films. The second technique was employed in order to ensure growth on polymer flexible Kapton substrates. The BCZT45 thin films grown by both techniques show similar structural properties and high piezoelectric coefficient coupling between the mechanical loading and electrical potential. While it has long been shown that the electrical potential favors biological processes like osteogenesis, the assessment of cell adhesion and osteogenic differentiation onto BCZT materials has not yet been demonstrated. We prove here for the first time that BCZT 45 coatings on Kapton polymer substrates provide optimal support for osteogenic differentiation of mesenchymal stem cells in the bone marrow.
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Affiliation(s)
- N D Scarisoreanu
- National Institute for Laser, Plasma and Radiation Physics , 077125 Magurele, Romania
| | - F Craciun
- CNR-ISC, Istituto dei Sistemi Complessi , Area della Ricerca di Roma-Tor Vergata, Via del Fosso del Cavaliere 100, I-00133 Rome, Italy
| | - V Ion
- National Institute for Laser, Plasma and Radiation Physics , 077125 Magurele, Romania
| | - R Birjega
- National Institute for Laser, Plasma and Radiation Physics , 077125 Magurele, Romania
| | - A Bercea
- National Institute for Laser, Plasma and Radiation Physics , 077125 Magurele, Romania
| | - V Dinca
- National Institute for Laser, Plasma and Radiation Physics , 077125 Magurele, Romania
| | - M Dinescu
- National Institute for Laser, Plasma and Radiation Physics , 077125 Magurele, Romania
| | - L E Sima
- Institute of Biochemistry of the Romanian Academy , 296 Splaiul Independentei, 060031 Bucharest, Romania
| | - M Icriverzi
- Institute of Biochemistry of the Romanian Academy , 296 Splaiul Independentei, 060031 Bucharest, Romania
| | - A Roseanu
- Institute of Biochemistry of the Romanian Academy , 296 Splaiul Independentei, 060031 Bucharest, Romania
| | - L Gruionu
- Medinsys Craiova , Calea Unirii 32, 200409 Craiova, Romania
- Faculty of Mechanics, University of Craiova , Alexandru Ioan Cuza 13, 200585 Craiova, Romania
| | - G Gruionu
- Medinsys Craiova , Calea Unirii 32, 200409 Craiova, Romania
- Department of Surgery, Harvard Medical School and Massachusetts General Hospital , 55 Fruit Street White 506, Boston, Massachusetts 02114, United States
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Gatin E, Luculescu C, Birjega R, Barna E. Importance of the Casting Process. Comparative Survey of the Commonly Used Ni-Cr Dental Alloys. Particulate Science and Technology 2013. [DOI: 10.1080/02726351.2013.785452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Gatin E, Luculescu CR, Birjega R, Ciobanu L, Patrascu I. Alumina versus Zirconia Comparative Survey of Thermic Influence During Dental Ceramic Core Manufacturing Process. Particulate Science and Technology 2013. [DOI: 10.1080/02726351.2012.675016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Wei X, Georgescu R, Ali N, Morjan I, George TA, Dumitrache F, Birjega R, Chipara M, Skomski R, Sellmyer DJ. On the synthesis and physical properties of iron doped SnO2 nanoparticles. J Nanosci Nanotechnol 2012; 12:9299-9301. [PMID: 23447992 DOI: 10.1166/jnn.2012.6784] [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: 06/01/2023]
Abstract
The synthesis of iron doped tin oxide by pulsed laser pyrolysis is reported. The as obtained nanoparticles have a dominant SnO2 phase (as revealed by Wide Angle X-ray Scattering), with particles of the order of 10 nm. The doping with iron or iron oxide triggers magnetic properties as confirmed by SQUID experiments. EDX measurements supported the presence of Fe while Wide Angle X-ray Scattering failed to sense any iron or iron-oxide phase. It is concluded that Fe is well dispersed within the tin-oxide nanoparticles. The coercitive field has a complex dependence on the Fe/Sn content suggesting that the magnetization is not controlled solely by the amount of Fe dispersed within the nanoparticles.
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Affiliation(s)
- X Wei
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
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Morjan I, Dumitrache F, Alexandrescu R, Fleaca C, Birjega R, Luculescu C, Soare I, Dutu E, Filoti G, Kuncser V, Prodan G, Popa N, Vékás L. Laser synthesis of magnetic iron–carbon nanocomposites with size dependent properties. ADV POWDER TECHNOL 2012. [DOI: 10.1016/j.apt.2010.12.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Nistor SV, Stefan M, Nistor LC, Mateescu CD, Birjega R. Localization of Mn2+ ions in mesoporous NnS. J Nanosci Nanotechnol 2010; 10:6200-6205. [PMID: 21133174 DOI: 10.1166/jnn.2010.2599] [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: 05/30/2023]
Abstract
Nanocrystalline cubic ZnS doped with 0.2% mol manganese, exhibiting a stable mesoporous structure, was synthesized at room temperature by a non toxic surfactant-assisted liquid-liquid reaction. The X-ray diffraction measurements demonstrate the formation of a sponge-like mesoporous material built from cubic ZnS nanocrystals of 1.8 nm average sizes, with a tight distribution of pores of 1.8 nm mean diameter. The transmission electron microscopy images confirm the formation of the mesoporous structure with walls of 3.1 nm mean thickness built from cubic ZnS nanocrystallites of 2.1 nm average size. The resulting tight distribution of crystallites and pores yields a well resolved Electron Paramagnetic Resonance spectrum, with the narrowest reported component lines attributed to three types of isolated Mn2+ centers, called Mn2+(I), Mn2+(II) and Mn2+(III). From the analysis of the spin Hamiltonian parameters it is shown that in the Mn2+(I) centers the paramagnetic ion is situated at substitutional Zn sites in the ZnS nanocrystals, being also subjected to a small axial distortion. The relative concentration changes under thermal treatment experiments strongly suggest that in both Mn2+(II) and Mn2+(III) centers the Mn2+ ion is localized on the surface of the ZnS nanocrystallites, being bond to an oxygen ion in the first case and to an additional water molecule in the second case.
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Affiliation(s)
- S V Nistor
- National Institute for Materials Physics, P.O. Box MG-7, Magurele, Romania
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Morjan I, Alexandrescu R, Dumitrache F, Birjega R, Fleaca C, Soare I, Luculescu CR, Filoti G, Kuncer V, Vekas L, Popa NC, Prodan G, Ciupina V. Iron oxide-based nanoparticles with different mean sizes obtained by the laser pyrolysis: structural and magnetic properties. J Nanosci Nanotechnol 2010; 10:1223-1234. [PMID: 20352781 DOI: 10.1166/jnn.2010.1863] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Nano-sized iron oxide-based particles have been directly synthesized by the laser induced pyrolysis of a mixture containing iron pentacarbonyl/air (as oxidizer)/ethylene (as sensitizer). In this paper we further demonstrate the possibility to vary the chemical composition and the nanoparticle dimensions of the iron oxide-based materials by handling the oxidation procedure in the frame of the laser pyrolysis process. Thus, nanoparticles with major maghemite/magnetite content may change composition into mixtures with variable amounts of three components: major gamma-Fe2O3/Fe3O4 iron oxide, metallic Fe and cementite Fe3C. By X-ray diffraction (XRD) it is found that the relative proportion of these phases differs in function of the reaction temperature (laser power). As revealed by transmission electron microscopy (TEM), mean particle sizes between about 4 nm and 6 nm and between about 9 and 11 nm may be prepared by varying the oxidation procedure and the laser power, respectively. By the controlled heating of samples (maximum temperature 185 degrees C), increased crystallinity for the gamma-Fe2O3/Fe3O4 oxide phase was found as well as an increase of the mean particle diameters. The examination of the magnetization curves for samples obtained for different laser powers indicates notable differences in the magnetic behavior and parameters. The temperature dependent Mossbauer measurements confirm the formation of larger particles at higher laser power densities as well as the presence of inter-particle magnetic interactions. On this basis, the estimation of phase composition for the different representative samples is given.
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Affiliation(s)
- I Morjan
- National Institute for Lasers, Plasma and Radiation Physics Bucharest, POB MG-36, 077125 Romania
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