期刊
MACROMOLECULES
卷 50, 期 16, 页码 6255-6262出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.7b01528
关键词
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资金
- Swiss National Science Foundation [163220, 168223]
- National Center of Competence in Research Bio-Inspired Materials
- Adolphe Merkle Foundation
- Engineering and Physical Sciences Research Council through the Cambridge NanoDTC [EP/G037221/1, EP/L027151/1, EP/N016920/1, EP/G060649/1]
- ERC LINASS [320503]
- European Union's Horizon research and innovation programme under the Marie Sklodowska-Curie grant [706329/cOMPoSe]
- National Science Foundation [DMR-1409105]
- NSF
- NIH/NIGMS via NSF [DMR-1332208]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1409105] Funding Source: National Science Foundation
- Engineering and Physical Sciences Research Council [EP/G060649/1, EP/N016920/1, EP/L027151/1] Funding Source: researchfish
- EPSRC [EP/N016920/1, EP/G060649/1, EP/L027151/1] Funding Source: UKRI
Block copolymer (BCP) self-assembly is a promising route to manufacture functional nanomaterials for applications from nanolithography to optical metamaterials. Self-assembled cubic morphologies cannot, however, be conveniently optically characterized in the lab due to their structural isotropy. Here,the aligned crystallization behavior of a semicrystalline-amorphous polyisoprene-b-pplystyrene-b-poly(ethylene oxide) (ISO) triblock terpolymer was utilized to visualize the grain structure of the cubic microphase separated. morphology. Upon quenching from a solvent swollen state, ISO first self-assembles into an alternating gyroid morphology, in the confinement of which the PEO crystallites preferentially along the least tortuous pathways of the single gyroid morphology with grain sizes of hundreds of micrometers. Strikingly, the resulting anisotropic alignment of PEO crystallites gives rise to a unique optical birefringence of the alternating gyroid domains, which allows imaging,of the self assembled grain structure by optical microscopy alone. This study provides insight into polymer crystallization within A,tortuous three-dimensional network and establishes a useful method for the optical visualization of cubic BCP morphologies that serve as functional nanomaterial templates.
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