The Effect of Temperature on the Morphology and Kinetics of Surface Pattern Formation in Thin Block Copolymer Films
A P. Smith, Jack F. Douglas, Eric J. Amis, Alamgir Karim
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.
, Douglas, J.
, Amis, E.
and Karim, A.
The Effect of Temperature on the Morphology and Kinetics of Surface Pattern Formation in Thin Block Copolymer Films, Langmuir, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852729
(Accessed December 8, 2023)