Creating Biomorphic Barbed and Branched Mesostructures in Solution through Block Copolymer Crystallization

Lin Jia, Gerald Guerin*, Yijie Lu, Qing Yu, Ian Manners, Mitchell A. Winnik

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

6 Citations (Scopus)
153 Downloads (Pure)

Abstract

Branched and barbed structures are common in nature but rare in nanoscale or mesoscale objects formed by bottom-up self-assembly. Key characteristics of the morphology of natural objects, such as various types of insects and conifer branches, is that despite their similarities no two individual objects are exactly the same. Here we report the self-assembly conditions for a series of poly(ferrocenyldimethylsilane)-block-polyisoprene (PFS-b-PI) diblock copolymers that generate structures with biomorphic shapes. All of these polymers yield long uniform fiber-like micelles with a crystalline PFS core in decane. Injection of a concentrated THF solution of these polymers into THF/decane mixtures, however, leads to barbed and branched mesostructures, with shapes that depend upon the final THF content of the mixed solvent. Interestingly, evaporation of the THF from suspensions of the colloidal biomorphic structures led to elongated fiber-like structures.

Original languageEnglish
Pages (from-to)17205-17210
Number of pages6
JournalAngewandte Chemie - International Edition
Volume57
Issue number52
Early online date27 Nov 2018
DOIs
Publication statusPublished - 21 Dec 2018

Keywords

  • biomorphism
  • crystallization-driven self-assembly
  • morphology transformation
  • solvent mixtures
  • supermicelles

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