Thermodynamic and kinetic aspects of defectivity in directed self-assembly of cylinder-forming diblock copolymers in laterally confining thin channels

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[1] Kim, Bongkeun
[2] Laachi, Nabil
[3] Delaney, Kris T.
[4] Carilli, Michael
[5] 1,Kramer, Edward J.
[6] 1,Fredrickson, Glenn H.
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Fredrickson, Glenn H. | 1600年 / John Wiley and Sons Inc卷 / 131期
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We use self-consistent field theory to calculate the energy of defect formation in cylinder-forming diblock copolymers in laterally confining thin channels. We focus on two isolated defects; dislocations and disclinations and explore a wide range of polymer and channel characteristics. Our findings suggest appropriate conditions for the design of optimized graphoepitaxial processes; where defects are limited to very low concentrations. Using the string method; we also investigate the energy barriers and kinetic pathways of the transition from defective to perfect states. © 2014 Wiley Periodicals; Inc;
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