Ageing of thin Ag/fluorocarbon plasma polymer nanocomposite films exposed to water-based electrolytes
Ageing of thin Ag/fluorocarbon plasma polymer nanocomposite films exposed to water-based electrolytes
复制标题
银/氟碳等离子体聚合物纳米复合薄膜暴露于水基电解质中的老化
DOI：
10.1016/j.actamat.2007.10.035
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发表时间：
2008
期刊：
影响因子：
9.4
通讯作者：
G. Grundmeier
中科院分区：
文献类型：
--
作者：
Xuemei Wang;C. Somsen;G. Grundmeier
通过十七氟-1-癸烯（HDFD）的等离子体聚合与银的电子束蒸发相结合，合成了含银的氟碳等离子体聚合物纳米复合材料薄膜。利用X射线光电子能谱和高分辨率透射电子显微镜（HRTEM）对Ag/HDFD等离子体聚合物纳米复合薄膜的化学结构和微观结构进行了表征。研究了退火对银纳米粒子微观结构和Ag/HDFD等离子体聚合物纳米复合薄膜光学性能的影响。特别是，利用HRTEM、电化学阻抗谱和紫外可见光谱研究了Ag/HDFD等离子体聚合物纳米复合薄膜在水基电解质中老化过程中的微观结构、阻隔和光学性能。银纳米颗粒的微观结构在老化过程中发生形态变化，这是基于原子金属扩散、颗粒之间的聚结和由功函数和标准电极电势的尺寸依赖性驱动的电化学奥斯特瓦尔德熟化的结合。
Ag-containing fluorocarbon plasma polymer nanocomposite films were synthesized by combining plasma polymerization of heptadecafluoro-1-decene (HDFD) with electron beam evaporation of silver. The chemical structure and the microstructure of the Ag/HDFD plasma polymer nanocomposite films were characterized by means of X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy (HRTEM). The effect of annealing on the microstructure of silver nanoparticles and the optical properties of the Ag/HDFD plasma polymer nanocomposite films was investigated. In particular, the microstructural, barrier and optical properties of Ag/HDFD plasma polymer nanocomposite films were studied by means of HRTEM, electrochemical impedance spectroscopy and ultraviolet–visible spectroscopy during the ageing process in water-based electrolytes. The microstructure of silver nanoparticles changed morphologically during the ageing process based on the combination of atomic metal diffusion, coalescence between particles and electrochemical Ostwald ripening driven by the size dependence of the work function and standard electrode potential.