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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:37 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Tunability of the surface morphology of Polyethyene glycol Polycaprolactone methyl ether copolymer coatings obtained by Matrix Assisted Pulsed Laser Evaporation
Authors:
Simona BRAJNOCOV(1), Laurentiu RUSEN(1), Mihaela FILIPESCU(1), Maria DINESCU(1) and Valentina DINCA(1)
Affiliation:
1)National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, PO Box MG-16, Zip RO-077125, Magurele, Bucharest, Romania
E-mail
simonabrajnicov@yahoo.com , valentina.dinca@inflpr.ro
Keywords:
MAPLE, AFM,PEG-PCL Me, copolymer
Abstract:
Copolymers are widely used for creating bio-interfaces for in vitro studies. Controlling the bio-interface physical and chemical characteristics is an important factor within bio-applications field. In the last years, laser based methods are known as suitable tools for creating surfaces for biological studies. In this work, we study the influence of various parameters in obtaining functional coatings of Polyethyene glycol Polycaprolactone methyl ether copolymer (PEG-PCL Me) coatings by matrix-assisted pulsed laser evaporation (MAPLE). Different parameters, such as laser fluence, number of pulses, target composition and solvent type were used for obtaining polymeric coatings. Their morphological characteristics were analyzed by Atomic force microscopy (AFM) technique and correlated with the deposition parameters. It is shown that the homogeneity, density and the roughness of the coatings are related both to laser parameters and also to target composition and matrix type. The roughness of the samples increased with increasing laser fluence, and various morphological features such as droplets appeared on the surface of the coatings. Changing the matrix leads to variation in surface features, from relatiely low to high roughness, and even cracks or irregular island structures. The ability to control the type of morphology of the deposited material by MAPLE is an important step in creating functional and tunable bio-interfaces.
Acknowledgement:
The research leading to these results has received funding from the Romanian Ministry of National Education, CNCS – UEFISCDI, under the project PN-II-PT-PCCA 239/2014
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