Responsive blends of block copolymers stabilize the hexagonally perforated lamellae morphology

Nowak, Samantha R.; Tiwale, Nikhil; Doerk, Gregory S.; Nam, Chang-Yong; Black, Charles T.; Yager, Kevin G.

doi:10.1039/d3sm00142c

Responsive blends of block copolymers stabilize the hexagonally perforated lamellae morphology

Journal Article · Wed Mar 15 04:00:00 EDT 2023 · Soft Matter

DOI:https://doi.org/10.1039/d3sm00142c· OSTI ID:1969360

Nowak, Samantha R. ^[1]; ^[1]; ^[1]; ^[1]; Black, Charles T. ^[1]; ^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)

Blends of block copolymers can form phases and exhibit features distinct from the constituent materials. Herein we study thin film blends of cylinder-forming and lamellar-forming block copolymers across a range of substrate surface energies. Blend materials are responsive to interfacial energy, allowing selection of pure or coexisting phases based on surface chemistry. Blending stabilizes certain motifs that are typically metastable, and can be used to generate pure hexagonally perforated lamellar thin films across a range of film thicknesses and surface energies. This tolerant behavior is ascribed to the ability of blend materials to redistribute chains to stabilize otherwise high-energy defect structures. The blend responsiveness allows the morphology to be spatially defined through multi-tone chemical surface patterns.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN); Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012704

OSTI ID:: 1969360

Alternate ID(s):: OSTI ID: 1962965

Report Number(s):: BNL-224209-2023-JAAM

Journal Information:: Soft Matter, Journal Name: Soft Matter Journal Issue: 14 Vol. 19; ISSN 1744-683X

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Block Copolymer Lithography: Merging “Bottom-Up” with “Top-Down” Processes Hawker, Craig J.; Russell, Thomas P. MRS Bulletin, Vol. 30, Issue 12, p. 952-966 https://doi.org/10.1557/mrs2005.249	journal	December 2005