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

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• 作者：A.V. Rahachou^a ; A.A. Rogachev^a ; ^{rogachev78@mail.ru} ; M.A. Yarmolenko^a ; Jiang Xiao-Hong^b ; Liu Zhu Bo^a ; ^b
• 关键词：Electron beam deposition ; Molecular structure ; Nanocomposite coatings ; Plasmon absorption
• 刊名：Applied Surface Science
• 出版年：2012
• 出版时间：1 January 2012
• 年：2012
• 卷：258
• 期：6
• 页码：1976-1980
• 全文大小：629 K

文摘

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 30 nm and absorb within the short-wave range from 400 to 550 nm.