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

TitleThermodynamic and kinetic aspects of defectivity in directed self-assembly of cylinder-forming diblock copolymers in laterally confining thin channels
Publication TypeJournal Article
Year of Publication2014
AuthorsKim BJ, Laachi N, Delaney KT, Carilli MF, Kramer EJ, Fredrickson GH
JournalJournal of Applied Polymer Science
Volume131
Issue24
Pagination40790
Date Published12/2014
ISSN00218995
Keywords21975, CNSI/MRL, CSC, Dow, Fredrickson, Kramer, MRL
Abstract

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.

URLhttp://doi.wiley.com/10.1002/app.40790
DOI10.1002/app.40790
Grant: 
CSC, MRL (DMR-1121053)