Browsing by Subject "Charged block copolymer"

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    Data for Superlattice by charged block copolymer self-assembly
    (2019-04-09) Shim, Jimin; Bates, Frank S; Lodge, Timothy P; lodge@umn.edu; Lodge, Timothy P; Bates Research Group; Lodge Research Group
    These files contain data along with the associated output from instrumentation supporting all results reported in "Superlattice by charged block copolymer self-assembly" by Shim et. al. We report the discovery of an intriguing superlattice morphology from compositionally symmetric charged block copolymers, poly[(oligo(ethylene glycol) methyl ether methacrylate–co–oligo(ethylene glycol) propyl sodium sulfonate methacrylate)]–b–polystyrene (POEGMA–PS). These materials are conveniently prepared by sequential reversible addition–fragmentation chain transfer (RAFT) polymerization, followed by introduction of charged groups, in a manner that allows for systematic variation of the molecular structure in general, and the charge content in particular. POEGMA–PS self-assembles into a superlattice lamellar morphology, a previously unknown class of diblock nanostructures, but strikingly similar to oxygen-deficient perovskite derivatives, when the fraction of charged groups in the POEGMA block is about 5–25%. The charge fraction in the POEGMA block, and the tethering of the ionic groups, both play critical roles in driving the formation of the superlattice. This study highlights the accessibility of novel morphologies by introducing charges in a controlled manner.