Emergence of Chaos in a Compartmentalized Catalytic Reaction Nanosystem

Overview

Journal Nat Commun

Specialty Biology

Date 2023 Feb 9

PMID 36759520

Authors

Maximilian Raab

Johannes Zeininger

Yuri Suchorski

Keita Tokuda

Gunther Rupprechter

Affiliations

Soon will be listed here.

Abstract

In compartmentalized systems, chemical reactions may proceed in differing ways even in adjacent compartments. In compartmentalized nanosystems, the reaction behaviour may deviate from that observed on the macro- or mesoscale. In situ studies of processes in such nanosystems meet severe experimental challenges, often leaving the field to theoretical simulations. Here, a rhodium nanocrystal surface consisting of different nm-sized nanofacets is used as a model of a compartmentalized reaction nanosystem. Using field emission microscopy, different reaction modes are observed, including a transition to spatio-temporal chaos. The transitions between different modes are caused by variations of the hydrogen pressure modifying the strength of diffusive coupling between individual nanofacets. Microkinetic simulations, performed for a network of 52 coupled oscillators, reveal the origins of the different reaction modes. Since diffusive coupling is characteristic for many living and non-living compartmentalized systems, the current findings may be relevant for a wide class of reaction systems.

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