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Publication Citation: The Effect of Temperature on the Morphology and Kinetics of Surface Pattern Formation in Thin Block Copolymer Films

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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.
Citation: Langmuir
Volume: 23
Pages: pp. 12380 - 12387
Keywords: block copolymers;critical fluctuation effects on dynamics;defects;hole formation;kinetics;order-disorder transition;surface pattern formation
Research Areas: Polymers
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