Dewetting modes of thin metallic films: Nucleation of holes and spinodal dewetting
Dewetting modes of thin metallic films: Nucleation of holes and spinodal dewetting
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DOI：
10.1103/physrevlett.77.1536
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发表时间：
1996-08-19
影响因子：
8.6
通讯作者：
Leiderer, P
中科院分区：
文献类型：
--
作者：
Bischof, J;Scherer, D;Leiderer, P
我们研究了在调q激光脉冲下熔融后，熔融石英衬底上金属薄膜（Au, Cu, Ni）的脱湿现象。光学显微镜、扫描电镜和扫描近场声学显微镜揭示了两种明显不同的脱湿过程模式：一方面，我们观察到“干”圆形斑块的非均质成核，其直径在融化期间增长；另一方面，观察到液膜对具有特征波长的表面波振幅的不稳定性，我们认为这是第一次观察到旋量脱湿。相反，破裂膜的最终结构取决于是成核还是独立脱湿。
We have studied the dewetting of thin liquid metal films (Au, Cu, Ni) on fused silica substrates which occurs after melting with a Q-switched laser pulse. Optical microscopy, scanning electron microscopy, and scanning near field acoustic microscopy reveal two distinctly different modes of the dewetting process: On one hand, we observe heterogeneous nucleation of ''dry'' circular patches, which grow in diameter during the melting period. On the ether hand, an instability of the liquid film against the growth in amplitude of surface waves with a characteristic wavelength is observed, which we believe is the first observation of spinodal dewetting. In contrast, the final structure of the ruptured film depends on whether nucleation or spinodal dewetting is dominant.