Characteristic mechanical properties and complex ordered structures in metal films on liquid substrates  

作　　者：YU Senjiang ZHANG Yongju WU Liangneng CUI Yujian GE Hongliang 

机构地区：[1]Department of Applied Physics, China Jiliang University, Hangzhou 310018, China [2]Department of Physics, Zhejiang University, Hangzhou 310027, China [3]Department of Physics, Taizhou University, Linhai 317000, China

出　　处：《Chinese Science Bulletin》2006年第9期1039-1049,共11页

基　　金：This work was supported by the National Natural Science Foundation of China （Grant No. 211571067） ;the Foundation of Zhejiang Pruvincital Education Department in China （Grant No.20040373）.

摘　　要：Several metal (such as aluminum, iron etc.) film systems deposited on liquid (silicone oil) substrates have been successfully fabricated by a thermal evaporation method, and the special me- chanical properties and complex ordered surface structures have been systematically studied. The experimental results show that there exists a com- pressive stress gradient in these films, making cracks nucleate at the film edges and then extend to the central regions gradually. Because the interaction between solid films and liquid substrates in the tan- gent direction is very small, the metal films can mo- tion freely on the oil surfaces as a whole. In order to release the compressive stress, the broken film pieces collide, crush and superpose each other, which finally results in the formation of ordered band- shaped structures with an anti-symmetric character- istic. Based on the special mechanical properties of these nearly free sustained films, the morphologies and growth behaviors of the ordered structures are analyzed and discussed in detail.Several metal （such as aluminum, iron etc.） film systems deposited on liquid （silicone oil） substrates have been successfully fabricated by a thermal evaporation method, and the special mechanical properties and complex ordered surface structures have been systematically studied. The experimental results show that there exists a compressive stress gradient in these films, making cracks nucleate at the film edges and then extend to the central regions gradually. Because the interaction between solid films and liquid substrates in the tangent direction is very small, the metal films can motion freely on the oil surfaces as a whole. In order to release the compressive stress, the broken film pieces collide, crush and superpose each other, which finally results in the formation of ordered band- shaped structures with an anti-symmetric characteristic. Based on the special mechanical properties of these nearly free sustained films, the morphologies and growth behaviors of the ordered structures are analyzed and discussed in detail.

关 键 词：有序结构 机械性能 金属薄膜 液体基底 内压 

分 类 号：O484[理学—固体物理]