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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:01 |
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Conference: Bucharest University Faculty of Physics 2016 Meeting
Section: Solid State Physics and Materials Science
Title:
Silver Doped Hydroxyapatite Thin Films Deposited on PDMS/Si
Authors:
Carmen Steluta CIOBANU (1), Cristina Liana POPA(1,2), Andreea GROZA(3), Simona Liliana ICONARU(1), Rodica GHITA(1), Alina Mihaela PRODAN (4,5), Mircea BEURAN (4,5), Stefania Mariana RAITA (6), Daniela PREDOI (1)
Affiliation:
1) National Institute for Materials Physics, P.O. Box MG 07, Bucharest, Magurele, Romania
2) University of Bucharest, Faculty of Physics, P.O.Box MG 11, Bucharest, Magurele, Romania
3) National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor St. PO-BOX MG 36, Magurele 077125, Romania
4) Carol Davila University of Medicine and Pharmacy, 8 Eroii Sanitari, Bucharest, Romania
5) Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine, Bucharest, Romania
6) Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine, Bucharest, Romania
E-mail
dpredoi@gmail.com
Keywords:
silver, hydroxyapatite, polydimethylsiloxane, layer, antimicrobial effect
Abstract:
In this work, the production and characterization of the silver doped hydroxyapatite with PDMS (AgHAp-PDMS) layers obtained by thermal evaporation technique are reported [1, 2]. The HAp:Ag(xAg = 0.5) powder has been deposited by thermal evaporation technique as solid layer on a silicon substrate previously coated with a PDMS layer.The Ag:HAp nanoparticles, are evaporated in vacuum. In the presence of a PDMS layer on the substrate, the evaporated Ag:HAp; nanoparticles diffuse into the PDMS layer during their travel to the substrate. When the Ag:HAp particles stop in the polymer layer they transfer their energy to the polymer. Thus, the local temperature increases and as the polymer is heated, the thermal condition of a new compound generation is assured. The silver doped hydroxyapatite with PDMS (AgHAp-PDMS) layers was characterized by Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FT-IR). By infrared spectroscopy analyses, the phase composition of the silver doped hydroxyapatite with PDMS (AgHAp-PDMS) layers was investigated. The antimicrobial activity of AgHAp-PDMS layers was tested against the Candida albicans strain. The microbial activity decreases significantly for the surveyed time intervals on Ag:HAp-PDMS layers. Future studies will be focused on creating a new substrate such as europium and samarium doped hydroxyapatite with PDMS layers that prevents the development of microbial strains.
References:
1. C.L. Popa, A. Groza, P. Chapon, C.S. Ciobanu, R. V. Ghita, R. Trusca, M. Ganciu, D. Predoi, Journal of Nanomaterials, vol. 2015, Article ID 250617, 10 pages, doi:10.1155/2015/250617 (2015).
2. C.S. Ciobanu, A. Groza, S.L. Iconaru, C.L. Popa, P. Chapon, M.C. Chifiriuc, R. Hristu, G.A. Stanciu, C. C. Negrila, R.V. Ghita, M. Ganciu, and D. Predoi, Antimicrobial Activity Evaluation on Silver Doped hydroxyapatite/Polydimethylsiloxane Composite Layer, BioMed Research International, Volume 2015, Article ID 926513, 13 pages; http://dx.doi.org/10.1155/2015/926513, (2015).
Acknowledgement:
The studies reported in this paper have been funded by the National PN II 259/2014 project.
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