Emergence of chaos in a compartmentalized catalytic reaction nanosystem

Maximilian Raab, Johannes Zeininger, Yuri Suchorski, Keita Tokuda and Günther Rupprechter ()
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Maximilian Raab: TU Wien
Johannes Zeininger: TU Wien
Yuri Suchorski: TU Wien
Keita Tokuda: Department of Computer Science, University of Tsukuba
Günther Rupprechter: TU Wien

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: 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.

Date: 2023
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DOI: 10.1038/s41467-023-36434-y

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