A Hydrolyzable Supra‐amphiphile as a Marangoni Self‐Propulsion Fuel for Efficient Macroscopic Supramolecular Self‐Assembly

Author:

Lu Guoxin1ORCID,Zhu Guiqiang1ORCID,Zhang Qian1ORCID,Tian Pan1ORCID,Cheng Mengjiao1ORCID,Shi Feng1ORCID

Affiliation:

1. State Key Laboratory of Chemical Resource Engineering Beijing Laboratory of Biomedical Materials Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology 15 Beisanhuan East Road, Chaoyang District Beijing 100029 China

Abstract

AbstractSelf‐assembly of μm‐to‐mm components is important for achieving all‐scale ordering with requirements of extra energy for motion and interaction of components. Marangoni flows caused by surfactants on water provide appropriate energy but have limited lifetimes because of the inevitable interfacial aggregation and difficult decomposition of aggregated covalent surfactants that inactivate Marangoni effects. Here we have synthesized a supra‐amphiphile Marangoni “fuel”—sodium‐4‐(benzylideneamino) benzenesulfonate (SBBS)—that can be hydrolyzed in a timely manner to a species without surface activity to extend the motion time by 10‐fold. The motion was optimized at pH=2 by a fine equilibrium between the releasing and removal of interfacial SBBS, leading to the self‐assembly of millimeter‐scaled ordered dimers. The underlying mechanism was interpreted by motion analyses and simulation. This strategy provides an active solution to self‐assembly at the μm‐to‐mm scale, as well as interactive ideas between miniaturized chemical robots.

Funder

National Science Fund for Distinguished Young Scholars

National Natural Science Foundation of China

Beijing Nova Program

National Key Research and Development Program of China

Fundamental Research Funds for the Central Universities

Publisher

Wiley

Subject

General Chemistry,Catalysis

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