Molecular structure and optical properties of PTFE-based nanocomposite polymer–metal coatings

► For PTFE+Cu and PTFE+Ag coatings the molecular organization of PTFE component is similar to pure PTFE coatings. ► The filling metallic nanoclusters of Ag or Cu to PTFE matrix leads to form the well-oriented, solid and pore-free layers at the less thickness of a coating. ► The molecules of the PTFE...

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Bibliographic Details
Published in:Applied surface science 2012-01, Vol.258 (6), p.1976-1980
Main Authors: Rahachou, A.V., Rogachev, A.A., Yarmolenko, M.A., Xiao-Hong, Jiang, Bo, Liu Zhu
Format: Article
Language:English
Subjects:
Coatings
Copper
Electron beam deposition
Molecular structure
Nanocomposite coatings
Nanomaterials
Nanostructure
Plasmon absorption
Polytetrafluoroethylenes
Scanning electron microscopy
Silver
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Summary:► For PTFE+Cu and PTFE+Ag coatings the molecular organization of PTFE component is similar to pure PTFE coatings. ► The filling metallic nanoclusters of Ag or Cu to PTFE matrix leads to form the well-oriented, solid and pore-free layers at the less thickness of a coating. ► The molecules of the PTFE component are off-oriented of thin PTFE+Mo coatings. The molecular organization of polytetrafluoroethylene (PTFE) thin coatings with incorporated Ag, Cu, and Mo nanoparticles that are deposited from an active gas component has been studied. Polyethylene terephtalate film coated by aluminium served as a substrate. The active gas component was produced by electron beam dispersion of original components in vacuum. The effect of metal particle size and its nature on the molecular structure of coatings have been investigated. Dichroism of thin nanocomposite coatings has been examined by polarized Fourier transform infrared spectroscopy using an attenuated total reflection unit. The morphology of the coatings has been analyzed by transmission (TEM), atomic-force (AFM), and scanning electron (SEM) microscopy. It is found that introduction of a metal (Ag or Cu) yields oriented layers at a lesser efficient thickness of a coating. The surface plasmon resonance of such structures was studied by measuring optical absorption of the coatings in the ultraviolet and visible ranges. The results show that the composite coatings containing Ag clusters are diameter less than 30nm and absorb within the short-wave range from 400 to 550nm.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2011.05.084