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Mitu A, Oprea A, Dumitru M, Florea NM, Glodariu T, Şuvăilă R, Luculescu C, Mărginean N, Dinescu M, Căta-Danil G. Preparation and characterization of strontium targets for nuclear astrophysics experiments. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-5833-1] [Citation(s) in RCA: 1] [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: 10/17/2022]
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Visan A, Stan GE, Ristoscu C, Popescu-Pelin G, Sopronyi M, Besleaga C, Luculescu C, Chifiriuc MC, Hussien MD, Marsan O, Kergourlay E, Grossin D, Brouillet F, Mihailescu IN. Combinatorial MAPLE deposition of antimicrobial orthopedic maps fabricated from chitosan and biomimetic apatite powders. Int J Pharm 2016; 511:505-515. [PMID: 27418570 DOI: 10.1016/j.ijpharm.2016.07.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 05/18/2016] [Revised: 07/08/2016] [Accepted: 07/09/2016] [Indexed: 11/30/2022]
Abstract
Chitosan/biomimetic apatite thin films were grown in mild conditions of temperature and pressure by Combinatorial Matrix-Assisted Pulsed Laser Evaporation on Ti, Si or glass substrates. Compositional gradients were obtained by simultaneous laser vaporization of the two distinct material targets. A KrF* excimer (λ=248nm, τFWHM=25ns) laser source was used in all experiments. The nature and surface composition of deposited materials and the spatial distribution of constituents were studied by SEM, EDS, AFM, GIXRD, FTIR, micro-Raman, and XPS. The antimicrobial efficiency of the chitosan/biomimetic apatite layers against Staphylococcus aureus and Escherichia coli strains was interrogated by viable cell count assay. The obtained thin films were XRD amorphous and exhibited a morphology characteristic to the laser deposited structures composed of nanometric round shaped grains. The surface roughness has progressively increased with chitosan concentration. FTIR, EDS and XPS analyses indicated that the composition of the BmAp-CHT C-MAPLE composite films gradually modified from pure apatite to chitosan. The bioevaluation tests indicated that S. aureus biofilm is more susceptible to the action of chitosan-rich areas of the films, whilst the E. coli biofilm proved more sensible to areas containing less chitosan. The best compromise should therefore go, in our opinion, to zones with intermediate-to-high chitosan concentration which can assure a large spectrum of antimicrobial protection concomitantly with a significant enhancement of osseointegration, favored by the presence of biomimetic hydroxyapatite.
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Affiliation(s)
- A Visan
- National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele-Ilfov, Romania
| | - G E Stan
- National Institute of Materials Physics, 077125 Magurele-Ilfov, Romania
| | - C Ristoscu
- National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele-Ilfov, Romania
| | - G Popescu-Pelin
- National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele-Ilfov, Romania
| | - M Sopronyi
- National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele-Ilfov, Romania
| | - C Besleaga
- National Institute of Materials Physics, 077125 Magurele-Ilfov, Romania
| | - C Luculescu
- National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele-Ilfov, Romania
| | - M C Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, 060101 Bucharest, Romania; Earth, Environmental and Life Sciences Division, Research Institute of the University of Bucharest, 77206 Bucharest, Romania
| | - M D Hussien
- Department of Microbiology, Faculty of Biology, University of Bucharest, 060101 Bucharest, Romania; Earth, Environmental and Life Sciences Division, Research Institute of the University of Bucharest, 77206 Bucharest, Romania
| | - O Marsan
- University of Toulouse, CIRIMAT, UPS ⿿ INPT ⿿ CNRS, ENSIACET, 4 Allée Emile Monso, 31030 Toulouse Cedex 4, France
| | - E Kergourlay
- University of Toulouse, CIRIMAT, UPS ⿿ INPT ⿿ CNRS, ENSIACET, 4 Allée Emile Monso, 31030 Toulouse Cedex 4, France
| | - D Grossin
- University of Toulouse, CIRIMAT, UPS ⿿ INPT ⿿ CNRS, ENSIACET, 4 Allée Emile Monso, 31030 Toulouse Cedex 4, France
| | - F Brouillet
- University of Toulouse, CIRIMAT, UPS ⿿ INPT ⿿ CNRS, ENSIACET, 4 Allée Emile Monso, 31030 Toulouse Cedex 4, France
| | - I N Mihailescu
- National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele-Ilfov, Romania.
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Mihailescu N, Stan G, Duta L, Chifiriuc MC, Bleotu C, Sopronyi M, Luculescu C, Oktar F, Mihailescu I. Structural, compositional, mechanical characterization and biological assessment of bovine-derived hydroxyapatite coatings reinforced with MgF 2 or MgO for implants functionalization. Materials Science and Engineering: C 2016; 59:863-874. [DOI: 10.1016/j.msec.2015.10.078] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 09/14/2015] [Accepted: 10/26/2015] [Indexed: 01/12/2023]
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Datcu A, Duta L, Pérez del Pino A, Logofatu C, Luculescu C, Duta A, Perniu D, György E. One-step preparation of nitrogen doped titanium oxide/Au/reduced graphene oxide composite thin films for photocatalytic applications. RSC Adv 2015. [DOI: 10.1039/c5ra07853a] [Citation(s) in RCA: 19] [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: 12/26/2022] Open
Abstract
Titanium dioxide (TiO2) and TiO2/Au/reduced graphene oxide nanocomposite thin films were grown by ultraviolet matrix assisted pulsed laser evaporation in controlled O2 or N2 atmospheres.
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Affiliation(s)
- A. Datcu
- National Institute for Lasers
- Plasma and Radiation Physics
- 77125 Bucharest
- Romania
| | - L. Duta
- National Institute for Lasers
- Plasma and Radiation Physics
- 77125 Bucharest
- Romania
| | - A. Pérez del Pino
- Instituto de Ciencia de Materiales de Barcelona
- Consejo Superior de Investigaciones Científicas
- ICMAB-CSIC
- 08193 Bellaterra
- Spain
| | - C. Logofatu
- National Institute for Materials Physics
- 77125 Bucharest
- Romania
| | - C. Luculescu
- National Institute for Lasers
- Plasma and Radiation Physics
- 77125 Bucharest
- Romania
| | - A. Duta
- Transilvania University of Brasov
- Brasov
- Romania
| | - D. Perniu
- Transilvania University of Brasov
- Brasov
- Romania
| | - E. György
- National Institute for Lasers
- Plasma and Radiation Physics
- 77125 Bucharest
- Romania
- Instituto de Ciencia de Materiales de Barcelona
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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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Ulmeanu M, Anghel I, Filipescu M, Luculescu C, Enculescu M, Zamfirescu M. Periodic arrays of nanostructures in silicon and gallium arsenide by near-field enhanced laser irradiation in liquid precursors. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2012.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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