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The non-equilibrium self-assembly of amphiphilic block copolymers driven by a pH oscillator

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Abstract Realizing and investigating artificial an non-equilibrium self-assembly is one of the challenging but attractive fields in supramolecular chemistry, because most molecular self-assembly in living organisms are out of thermodynamic… Click to show full abstract

Abstract Realizing and investigating artificial an non-equilibrium self-assembly is one of the challenging but attractive fields in supramolecular chemistry, because most molecular self-assembly in living organisms are out of thermodynamic equilibrium. In this article, we achieved the non-equilibrium self-assembly of amphiphilic block copolymers that contained polyethylene glycol segment and polyacrylic acid segment (PEG-PAAs) by coupling them with a pH oscillator. The self-assembly of PEG-PAAs varied dynamically and periodically in the pH oscillator. Furthermore, we found that the self-assembly of PEG-PAAs can bring additional influence on the dynamics of the pH oscillator. This line of work not only demonstrates the interrelationship between chemical oscillators and self-assembly of amphiphilic copolymers, but also contributes to develop chemical oscillators into a general driving force to realize and investigate non-equilibrium self-assembly of stimuli-responsive building blocks, and promotes the study of molecular self-assembly one step forward from static self-assembly under thermodynamic equilibrium to a dissipative system like living organisms.

Keywords: self assembly; equilibrium self; assembly amphiphilic; non equilibrium; self

Journal Title: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Year Published: 2017

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