Superlattice by charged block copolymer selfassembly

Title
Superlattice by charged block copolymer selfassembly
Authors
심지민Frank S. BatesTimothy P. Lodge
Issue Date
2019-05
Publisher
Nature Communications
Citation
VOL 10, 2108
Abstract
Charged block copolymers are of great interest due to their unique self-assembly and physicochemical properties. Understanding of the phase behavior of charged block copolymers, however, is still at a primitive stage. Here 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), achieved by 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 and the tethering of the ionic groups both play critical roles in driving the superlattice formation. This study highlights the accessibility of superlattice morphologies by introducing charges in a controlled manner.
URI
http://pubs.kist.re.kr/handle/201004/71120
ISSN
2041-1723
Appears in Collections:
KIST Publication > Article
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