Chemical morphogenesis: recent experimental advances in reaction-diffusion system design and control.

Area of Science:

• Chemical kinetics
• Pattern formation
• Reaction-diffusion systems

Background:

• Alan Turing predicted spontaneous pattern formation in reacting chemical systems in 1952.
• Experimental realization of Turing's reaction-diffusion patterns was limited for decades.
• Recent advancements have accelerated the discovery of new reaction-diffusion systems.

Purpose of the Study:

• To formally justify a semi-empirical design method for reaction-diffusion patterns.
• To introduce a novel approach for simplifying spatial reactor descriptions.
• To experimentally validate the method with new reaction systems.

Main Methods:

• Numerical simulations using a realistic kinetic model.
• A new method to collapse confined spatial dimensions of reactors.
• Experimental observation of stationary patterns in non-oxihalogen redox reactions.

Main Results:

• The proposed design method significantly increased the number of known reaction-diffusion pattern examples.
• A simplified reactor model accounting for geometric size and diffusion coefficient differences was developed.
• New stationary patterns were observed in redox reactions, expanding beyond oxihalogen chemistry.

Conclusions:

• The justified design method facilitates the discovery of reaction-diffusion patterns.
• The novel reactor simplification method balances accuracy and computational efficiency.
• The observed systems demonstrate the ability to process and memorize initial conditions as geometric patterns.