Chah Soonwoo, Noolandi Jaan, Zare Richard N
Department of Chemistry, Stanford University, Stanford, California 94305, USA.
J Phys Chem B. 2005 Oct 20;109(41):19416-21. doi: 10.1021/jp0535644.
Using two-dimensional surface plasmon resonance measurements, we have observed the formation of traveling waves in the delamination of thin films of polydimethylsilane (PDMS) exposed to methanol. Films were spin-coated on a gold surface and the methanol was added to the top surface. The stress-induced instability caused by the swelling of the PDMS thin film when its edge is pinned to the gold surface leads to wrinkle formation and propagation at the interface. The periodic pattern is thought to be the result of an Asaro-Tiller-Grinfeld (ATG) instability.
通过二维表面等离子体共振测量，我们观察到暴露于甲醇中的聚二甲基硅烷（PDMS）薄膜分层过程中传播波的形成。将薄膜旋涂在金表面上，并将甲醇添加到顶表面。当PDMS薄膜的边缘固定在金表面时，其溶胀引起的应力诱导不稳定性导致界面处形成皱纹并传播。这种周期性图案被认为是阿萨罗-蒂勒-格林菲尔德（ATG）不稳定性的结果。
