Characterizing the Interface Scaling of High χ Block Copolymers near the Order-Disorder Transition.

ABSTRACT: Advancements in the directed self-assembly of block copolymers (BCPs) have prompted the development of new materials with larger effective interaction parameters (χ_e). This enables BCP systems with phase separation at increasingly small degrees of polymerization (N). Very often these systems reside near the order-disorder transition and fit between the weak and strong segregation limits where the behavior of BCP systems is not as thoroughly understood. Utilizing resonant soft X-ray reflectivity (RSoXR) enables both the BCP pitch (L₀) and interface width (w_M) to be determined simultaneously, through a direct characterization of the composition profile of BCP lamellae oriented parallel to a substrate. A series of high χ

SUBMITTER: Sunday DF 

PROVIDER: S-EPMC5915283 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature