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Title: Preparation of Macroscopic Block‐Copolymer‐Based Gyroidal Mesoscale Single Crystals by Solvent Evaporation

Journal Article · · Advanced Materials
ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]
  1. Department of Materials Science and Engineering Cornell University Ithaca NY 14853 USA
  2. Department of Materials Science and Engineering Cornell University Ithaca NY 14853 USA, Robert Frederick Smith School of Chemical and Biomolecular Engineering Cornell University Ithaca NY 14853 USA
  3. Department of Physics Cornell University Ithaca NY 14853 USA, Kavli Institute at Cornell for Nanoscale Science Ithaca NY 14853 USA
  4. Department of Materials Science and Engineering Cornell University Ithaca NY 14853 USA, Kavli Institute at Cornell for Nanoscale Science Ithaca NY 14853 USA

Abstract Properties arising from ordered periodic mesostructures are often obscured by small, randomly oriented domains and grain boundaries. Bulk macroscopic single crystals with mesoscale periodicity are needed to establish fundamental structure–property correlations for materials ordered at this length scale (10–100 nm). A solvent‐evaporation‐induced crystallization method providing access to large (millimeter to centimeter) single‐crystal mesostructures, specifically bicontinuous gyroids, in thick films (>100 µm) derived from block copolymers is reported. After in‐depth crystallographic characterization of single‐crystal block copolymer–preceramic nanocomposite films, the structures are converted into mesoporous ceramic monoliths, with retention of mesoscale crystallinity. When fractured, these monoliths display single‐crystal‐like cleavage along mesoscale facets. The method can prepare macroscopic bulk single crystals with other block copolymer systems, suggesting that the method is broadly applicable to block copolymer materials assembled by solvent evaporation. It is expected that such bulk single crystals will enable fundamental understanding and control of emergent mesostructure‐based properties in block‐copolymer‐directed metal, semiconductor, and superconductor materials.

Sponsoring Organization:
USDOE
OSTI ID:
1558671
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Vol. 31 Journal Issue: 40; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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