Qiao L, He L H
CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui 230026, PRC.
Eur Phys J E Soft Matter. 2008 Aug;26(4):387-93. doi: 10.1140/epje/i2008-10334-3.
We study the instability of a very thin liquid film resting on a uniformly stretched soft elastomeric substrate driven by van der Waals forces. A linear stability analysis shows that the critical fluctuation wavelength in the tensile direction is larger than those in the other directions. The magnitudes of the critical wavelengths are adjustable in the sense that they depend on the principal stretch of the substrate. For example, when the principal stretch of the substrate varies from 1.0 (unstretched) to 3.0, the range of the critical wavelength in the tensile direction increases by 7.0% while that normal to the tensile direction decreases by 8.7%. Therefore, the phenomenon may find potential applications in creating tunable topographically patterned surfaces with nano- to microscale features.
我们研究了置于均匀拉伸的柔软弹性体基底上、由范德华力驱动的极薄液膜的不稳定性。线性稳定性分析表明，拉伸方向上的临界波动波长大于其他方向上的临界波动波长。临界波长的大小是可调的，因为它们取决于基底的主拉伸率。例如，当基底的主拉伸率从1.0（未拉伸）变化到3.0时，拉伸方向上的临界波长范围增加7.0%，而垂直于拉伸方向的临界波长范围减小8.7%。因此，该现象在创建具有纳米至微米尺度特征的可调谐地形图案表面方面可能具有潜在应用。
