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|Author(s):||A P. Smith; Jack F. Douglas; Eric J. Amis; Alamgir Karim;|
|Title:||The Effect of Temperature on the Morphology and Kinetics of Surface Pattern Formation in Thin Block Copolymer Films|
|Published:||October 29, 2007|
|Abstract:||Hole formation and size evolution on the surface of thin films of symmetric diblock copolymers is simultaneously investigated as a function of time, t, temperature, T, and film thickness, h. The hole size h approaches a steady state value at long times where this limiting value increases as the temperature increases. A model of the hole growth kinetics is introduced to describe these observations. The time constant characterizing the rate of approach of h to its asymptotic value first decreases and then increases with increasing T. These observations suggest a reduction of the surface elasticity of the outer block copolymer layer with increasing temperature and a critical slowing down of the film equilibration to its steady state. These effects are tentatively interpreted to arise from thermal fluctuations associated with the disordering transition.|
|Pages:||pp. 12380 - 12387|
|Keywords:||block copolymers,critical fluctuation effects on dynamics,defects,hole formation,kinetics,order-disorder transition,surface pattern formation|
|PDF version:||Click here to retrieve PDF version of paper (383KB)|