S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Mechanical Aerospace Engineering (기계항공공학부) Journal Papers (저널논문_기계항공공학부)
Polymer elasticity-driven wrinkling and coarsening in high temperature buckling of metal-capped polymer thin films
- Yoo, Pil J.; Suh, Kahp Y.; Kang, Hyewon; Lee, Hong H.
- Issue Date
- American Physical Society
- Phys. Rev. Lett. 93, 034301 (2004)
- LIQUID-FILMS; X-RAY; SURFACES; MICROCHANNELS; INSTABILITY; DEFORMATION; EVOLUTION; STRESS; WAVES; RANGE
- We report the critical effects the deformational stress from the elastic nature of a confined polymer layer has during the relaxation process on the buckling of thin metal-polymer bilayer systems (less than 100 nm) even above the temperature at which the polymer is in the liquid flow region. In contrast with what is generally believed, the dispersion force does not play a significant role in the buckling. We also find that the final wrinkled waves take on the shape of wormlike islands. The coarsening leading to the island structure is driven by the growth in amplitude of the dominant wave at the expense of less dominant ones.