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Synthesis and Characterization of Supramolecular Colloids
Published on: April 22, 2016
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Oscillations, travelling fronts and patterns in a supramolecular system
Jorge Leira-Iglesias1, Alessandra Tassoni1, Takuji Adachi1
1University of Strasbourg, CNRS, ISIS UMR 7006, Strasbourg, France.
Nature Nanotechnology
|October 17, 2018
Summary
Researchers developed artificial supramolecular polymers that exhibit self-oscillations and form large-scale patterns. This breakthrough mimics cellular functions and advances the creation of life-like materials and autonomous chemical robots.
Area of Science:
- Supramolecular chemistry
- Materials science
- Chemical engineering
Background:
- Biological supramolecular polymers like microtubules operate far from equilibrium, driving essential cellular processes.
- Observed phenomena include microtubule size oscillations (dynamic instabilities) and collective oscillations, as well as dynamic spatial structures in non-stirred systems.
- Existing artificial oscillating assemblies often require combining separate chemical oscillators with stimuli-responsive systems.
Purpose of the Study:
- To design and characterize an artificial supramolecular polymer capable of self-oscillation and pattern formation.
- To investigate the mechanisms behind oscillations, travelling fronts, and self-organized patterns in a synthetic system.
- To create a unified system where the self-assembling species also drives nonlinear dynamics, unlike previous approaches.
Main Methods:
- Synthesis of a perylene diimide derivative to form artificial supramolecular polymers.
- Driving the system far from equilibrium using chemical fuels to induce nonlinear dynamics.
- Observing and analyzing oscillations, travelling fronts, and centimetre-scale self-organized patterns.
Main Results:
- The artificial supramolecular polymer demonstrated oscillations, travelling fronts, and centimetre-scale self-organized patterns.
- Oscillations were attributed to a nucleation-elongation-fragmentation positive feedback loop and size-dependent depolymerization negative feedback.
- Pattern formation resulted from self-assembly-induced density differences driving system-wide convection.
Conclusions:
- This work presents a novel self-oscillating supramolecular polymer where the self-assembling species is also responsible for nonlinear dynamics.
- The findings pave the way for creating more life-like materials that respond dynamically to stimuli.
- This research contributes to the development of artificial autonomous chemical robots and advanced materials with emergent properties.
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