Oscillations, traveling fronts and patterns in a supramolecular system

Jorge Leira-Iglesias, Alessandra Tassoni, Takuji Adachi, Michael Stich, Thomas Hermans

Research output: Contribution to journalArticle

Abstract

Supramolecular polymers, such as microtubules, operate under non-equilibrium conditions to drive crucial functions in cells, such as motility, division and organelle transport1. In vivo and in vitro size oscillations of individual microtubules2,3 (dynamic instabilities) and collective oscillations4 have been observed. In addition, dynamic spatial structures, like waves and polygons, can form in non-stirred systems5. Here we describe an artificial supramolecular polymer made of a perylene diimide derivative that displays oscillations, travelling fronts and centimetre-scale self-organized patterns when pushed far from equilibrium by chemical fuels. Oscillations arise from a positive feedback due to nucleation–elongation–fragmentation, and a negative feedback due to size-dependent depolymerization. Travelling fronts and patterns form due to self-assembly induced density differences that cause system-wide convection. In our system, the species responsible for the nonlinear dynamics and those that self-assemble are one and the same. In contrast, other reported oscillating assemblies formed by vesicles6, micelles7 or particles8 rely on the combination of a known chemical oscillator and a stimuli-responsive system, either by communication through the solvent (for example, by changing pH7,8,9), or by anchoring one of the species covalently (for example, a Belousov–Zhabotinsky catalyst6,10). The design of self-oscillating supramolecular polymers and large-scale dissipative structures brings us closer to the creation of more life-like materials11 that respond to external stimuli similarly to living cells, or to creating artificial autonomous chemical robots12.
Original languageEnglish
Pages (from-to)1021-1027
JournalNature Nanotechnology
Volume13
DOIs
Publication statusPublished - 15 Oct 2018

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Polymers
stimuli
oscillations
polymers
chemical fuels
Perylene
Feedback
depolymerization
negative feedback
nonequilibrium conditions
Depolymerization
positive feedback
organelles
locomotion
polygons
Self assembly
assemblies
division
self assembly
convection

Bibliographical note

Copyright © 2018, Springer Nature

Cite this

Leira-Iglesias, Jorge ; Tassoni, Alessandra ; Adachi, Takuji ; Stich, Michael ; Hermans, Thomas. / Oscillations, traveling fronts and patterns in a supramolecular system. In: Nature Nanotechnology. 2018 ; Vol. 13. pp. 1021-1027.
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Oscillations, traveling fronts and patterns in a supramolecular system. / Leira-Iglesias, Jorge; Tassoni, Alessandra; Adachi, Takuji; Stich, Michael; Hermans, Thomas.

In: Nature Nanotechnology, Vol. 13, 15.10.2018, p. 1021-1027.

Research output: Contribution to journalArticle

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