Pulse-density modulation control of chemical oscillation far from equilibrium in a droplet open-reactor system

Haruka Sugiura, Manami Ito, Tomoya Okuaki, Yoshihito Mori, Hiroyuki Kitahata and Masahiro Takinoue ()
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Haruka Sugiura: Tokyo Institute of Technology
Manami Ito: Tokyo Institute of Technology
Tomoya Okuaki: Tokyo Institute of Technology
Yoshihito Mori: Faculty of Science, Ochanomizu University
Hiroyuki Kitahata: Graduate School of Science, Chiba University
Masahiro Takinoue: Tokyo Institute of Technology

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract The design, construction and control of artificial self-organized systems modelled on dynamical behaviours of living systems are important issues in biologically inspired engineering. Such systems are usually based on complex reaction dynamics far from equilibrium; therefore, the control of non-equilibrium conditions is required. Here we report a droplet open-reactor system, based on droplet fusion and fission, that achieves dynamical control over chemical fluxes into/out of the reactor for chemical reactions far from equilibrium. We mathematically reveal that the control mechanism is formulated as pulse-density modulation control of the fusion–fission timing. We produce the droplet open-reactor system using microfluidic technologies and then perform external control and autonomous feedback control over autocatalytic chemical oscillation reactions far from equilibrium. We believe that this system will be valuable for the dynamical control over self-organized phenomena far from equilibrium in chemical and biomedical studies.

Date: 2016
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DOI: 10.1038/ncomms10212

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