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Surface relief terraces in double-gyroid-forming polystyrene- block -polylactide thin films

Year: 2023
Type: article
Abstract: Ordered nanostructures arising from block copolymer self-assembly, such as three-dimensional bicontinuous network phases with percolating and interpenetrating microdomain structures, are attractive in thin films for photonic crystals, optical metamaterials, size-selective separation membranes, and components in hybrid solar cells. This study describes the thin-film self-assembly behavior of a diblock copolymer, which undergoes melt-self-assembly in the bulk into a double gyroid (DG) network phase. The authors discovered film-thickness-dependent formation of topographical terraces, including islands, holes, and bicontinuous features. The occurrence of these terraces sensitively depends on the incommensurability of the as-prepared film thickness with the (211)-interplanar spacing of the DG unit cell.
DOI: 10.1103/physrevmaterials.7.125601
Authors: Szu-Ming Yang, Jinwoo Oh, Benjamin R. Magruder, Hee Joong Kim, Kevin D. Dorfman, Mahesh K. Mahanthappa, Christopher J. Ellison
Language: English
Open Access status: hybrid
Funders: National Science Foundation, U.S. Department of Energy, University of Minnesota, Office of Science, Materials Research Science and Engineering Center, Harvard University, Division of Materials Research, Argonne National Laboratory
Awards: G107546177, G403942265, G4470453470, G6995829561, G743970376, University of Minnesota Materials Research Science and Engineering Center, NNCI: Midwest Nano Infrastructure Corridor (MINIC)
OpenAlex ID: W4389305403
FWCI: 0.443
Cites: 63
Cited by: 6
Related to: 10