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Article

Combining Fluorinated Polymers with Ag Nanoparticles as a Route to Enhance Optical Properties of Composite Materials

1
National Institute for Lasers, Plasma and Radiation Physics, PO Box M G-36, 077125 Magurele, Romania
2
National Institute of Materials Physics, PO Box MG-7, 077125 Magurele, Romania
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(8), 1640; https://doi.org/10.3390/polym12081640
Submission received: 3 July 2020 / Revised: 20 July 2020 / Accepted: 21 July 2020 / Published: 23 July 2020
(This article belongs to the Special Issue Advances in Polymer Based Composite Coatings)

Abstract

Polymer-based nanocomposites have recently received considerable attention due to their unique properties, which makes them feasible for applications in optics, sensors, energy, life sciences, etc. The present work focuses on the synthesis of nanocomposites consisting of a polytetrafluorethylene-like matrix in which metallic nano-silver are embedded, by using multiple magnetron plasmas. By successively exposing the substrate to separate RF magnetrons using as combination of target materials polytetrafluorethylene (PTFE) and silver, individual control of each deposition process is insured, allowing obtaining of structures in which silver nanoparticles are entrapped in-between two PTFE layers with given thicknesses. The topographical and morphological characteristics investigated by means of Scanning Electron Microscopy and Atomic Force Microscopy techniques evidenced the very presence of Ag nanoparticles with typical dimension 7 nm. The chemical composition at various depositing steps was evaluated through X-ray Photoelectron Spectroscopy. We show that the presence of the top PTFE layer prevents silver oxidation, while its thickness allows the tailoring of optical properties, as evidenced by spectroellipsometry. The appearance of chemical bonds between silver atoms and PTFE atoms at interfaces is observed, pointing out that despite of pure physical deposition processes, a chemical interaction between the polymeric matrix and metal is promoted by plasma.
Keywords: magnetron sputtering; PTFE matrix; Ag nanoparticles; AgCxFyOz bond; barrier layer; optical properties; surface plasmon resonance magnetron sputtering; PTFE matrix; Ag nanoparticles; AgCxFyOz bond; barrier layer; optical properties; surface plasmon resonance
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MDPI and ACS Style

Satulu, V.; Mitu, B.; Ion, V.; Marascu, V.; Matei, E.; Stancu, C.; Dinescu, G. Combining Fluorinated Polymers with Ag Nanoparticles as a Route to Enhance Optical Properties of Composite Materials. Polymers 2020, 12, 1640. https://doi.org/10.3390/polym12081640

AMA Style

Satulu V, Mitu B, Ion V, Marascu V, Matei E, Stancu C, Dinescu G. Combining Fluorinated Polymers with Ag Nanoparticles as a Route to Enhance Optical Properties of Composite Materials. Polymers. 2020; 12(8):1640. https://doi.org/10.3390/polym12081640

Chicago/Turabian Style

Satulu, Veronica, Bogdana Mitu, Valentin Ion, Valentina Marascu, Elena Matei, Cristian Stancu, and Gheorghe Dinescu. 2020. "Combining Fluorinated Polymers with Ag Nanoparticles as a Route to Enhance Optical Properties of Composite Materials" Polymers 12, no. 8: 1640. https://doi.org/10.3390/polym12081640

APA Style

Satulu, V., Mitu, B., Ion, V., Marascu, V., Matei, E., Stancu, C., & Dinescu, G. (2020). Combining Fluorinated Polymers with Ag Nanoparticles as a Route to Enhance Optical Properties of Composite Materials. Polymers, 12(8), 1640. https://doi.org/10.3390/polym12081640

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