Controlled syntheses of Ag-polytetrafluoroethylene nanocomposite thin films by co-sputtering from two magnetron sources
Controlled syntheses of Ag-polytetrafluoroethylene nanocomposite thin films by co-sputtering from two magnetron sources
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DOI：
10.1088/0957-4484/16/8/014
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发表时间：
2005-08-01
期刊：
影响因子：
3.5
通讯作者：
Faupel, F
中科院分区：
文献类型：
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作者：
Schürmann, U;Hartung, W;Faupel, F
使用两个独立磁控管源的共溅射来制备聚合物-金属纳米复合材料薄膜。金属分数增加的梯度薄膜和均匀复合薄膜都是使用可旋转样品架由聚四氟乙烯（PTFE）和银靶材生产的。研究了纯溅射聚合物的结构以及复合结构。复合材料在渗滤阈值附近的电性能显示出预期的电阻率急剧变化，从银含量较低时的 10(7) Omega cm 到渗滤后的 10(-3) Omega cm。由于表面等离子体共振而导致的可见光区域的光学吸收也对金属含量有很强的依赖性，在较高的银含量下，吸收峰从 405 nm 红移到超过 500 nm。
Co-sputtering from two independent magnetron sources was used to prepare polymer-metal nanocomposite films. Both gradient films with increasing metal fraction and homogeneous composite films were produced from polytetrafluoroethylene (PTFE) and silver targets using a rotatable sample holder. The structure of the pure sputtered polymer as well as the composite structure was studied. Electrical properties of the composite material near the percolation threshold show the expected, sharp change in the resistivity from 10(7) Omega cm at small silver content to 10(-3) Omega cm after percolation. The optical absorption in the visible region due to surface plasmon resonances also has a strong dependence on the metal content, showing a red shift of the absorption peak from 405 nm to more than 500 nm at higher silver content.