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Reversible Micrometer‐Scale Spiral Self‐Assembly in Liquid Crystalline Block Copolymer Film with Controllable Chiral Response
Author(s) -
Yuan Jianan,
Lu Xuemin,
Li Qingxiang,
Lü Zhiguo,
Lu Qinghua
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202101102
Subject(s) - materials science , copolymer , chirality (physics) , micrometer , spiral (railway) , enantiopure drug , nanotechnology , fabrication , self assembly , annealing (glass) , tartaric acid , chemical engineering , chemical physics , optics , organic chemistry , chemistry , composite material , polymer , enantioselective synthesis , citric acid , chiral symmetry breaking , physics , alternative medicine , mathematics , mathematical analysis , pathology , engineering , quark , quantum mechanics , nambu–jona lasinio model , catalysis , medicine
The spiral is a fundamental structure in nature and spiral structures with controllable handedness are of increasing interest in the design of new chiroptical materials. In this study, micrometer‐scale spiral structures with reversible chirality were fabricated based on the assembly of a liquid crystalline block copolymer film assisted by enantiopure tartaric acid. Mechanistic insight revealed that the formation of the spiral structures was closely related to the liquid crystalline properties of the major phase of block copolymer under the action of chiral tartaric acid. The chiral spiral structures with controllable handedness were easily erased under ultraviolet light irradiation and restored via thermal annealing. This facile thermal treatment method provides guidance for fabrication of chiral micrometer‐scale spiral structures with adjustable chiral properties.