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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:33 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Polyethylene glycol-silver nanocomposites obtained by hybrid PECVD/PVD plasma
Authors:
V. Satulu(1), B. Mitu(1), S. Somacescu(2), Diana Smarandache(3),
A. Lazea - Stoyanova(1), V. Ion(1), G. Dinescu(1)
Affiliation:
1. National Institute for Laser, Plasma and Radiation Physics,
409 Atomistilor Str., PO BOX MG-36, Magurele-Bucharest, 077125, Romania
2. “Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy,
202 Spl. Independentei, Bucharest, 060021, Romania
3 University of Bucharest, Centre for Research, Education and Consulting in
Microbiology, Genetics and Biotechnology,
1-3 Portocalilor Aley, 076201 Bucharest, Romania
E-mail
mitub@infim.ro
Keywords:
metal-polymer composite, antimicrobial effect, polyethyleneglycol, silver nanoparticles, hybrid plasma
Abstract:
Organic-inorganic nanocomposites have found extensive range of application in various fields, from energy storage to catalysis or biomedical materials, due to the synergistic effect obtained by proper control of composition and density of each component. In particular, metallic nanoparticles embedded in polymeric matrices are of high interest for biomedicine.
This work presents data regarding the synthesis of plasma polyethylene glycol –silver (PPEG-Ag) nanocomposites with tunable composition by using a hybrid plasma technique. The interest in this material comes from the properties of its components: plasma polymerized polyethylene glycol films present antifouling properties provided by the C-O-C bonds, while the silver particles are well known for their antimicrobial behavior as well as a highly tunable plasmon resonance effect. The synthesis process was conducted by a hybrid plasma system in which the substrate is simultaneously exposed to a magnetron sputtering plasma source (PVD) operating with a silver target, and to a plasma polymerization source (PECVD) through which ethylene glycol vapors at controlled flow rate were introduced by means of a small argon carrier flow. The influence of the monomer flow and the applied RF power on each plasma source has been investigated.
The material characteristics as regarding the morphology, structure, chemical composition and optical properties were determined by means of Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), and Spectroscopic ellipsometry respectively. The antimicrobial effect of PPEG-Ag nanocomposites was investigated by determination of growth inhibition or proliferation of E. coli cellular cultures. The results evidenced the experimental parametric windows corresponding to the preservation of C-O-C bonds and the optimal content of Ag in the nanocomposite material in respect to its antimicrobial response.
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