Optical and electrical properties of polymer metal nanocomposites prepared by magnetron co-sputtering

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• 作者：Ulrich Schü ; rmann ; Haile Takele ; Vladimir Zaporojtchenko and Franz Faupel
• 关键词：PTFE ; Silver nanoparticles ; Electrical properties ; Optical properties ; Bragg reflector
• 刊名：Thin Solid Films
• 出版年：2006
• 期刊代码：78_00406090
• 类别：ph
• 出版时间：25 October 2006
• 卷：515
• 期：2
• 页码：801-804
• 文件大小：181 K

摘要

Polymer-metal nanocomposite films were prepared by co-sputtering from two independent magnetron sources as well as from a silver-polytetrafluoroethylene (PTFE) composite target. By sputtering from two magnetrons we prepared both, samples with a metal gradient and homogenous composite films. The dielectric constant depends on the metal filling factor and increases approaching the percolation threshold. The resistivity drops from 10⁷ to 10^{− 3} Ω cm over a narrow range of metal content. The thin composite films show a strong optical absorption in the visible region and a red shift with increasing silver filling. We have produced Bragg reflectors using multilayer systems of composites and pure sputtered PTFE.