Excitability Modulation of Oscillating Media in 3D-Printed Structures

Area of Science:

• Chemical kinetics
• Systems biology
• Materials science

Background:

• Excitation and oscillation are fundamental to biological systems, exemplified by neuronal action potentials.
• The excitation threshold is a critical parameter for excitable systems, influencing processes like neurotransmission.
• Dynamic chemical systems offer models for physiological processes and potential for chemical computing.

Purpose of the Study:

• To investigate the influence of 3D-printed reaction vessel geometry on the Belousov-Zhabotinsky (BZ) reaction.
• To explore the modulation of excitability in the BZ medium through engineered channel dimensions.
• To assess the potential for creating structured networks of chemical oscillators using 3D printing.

Main Methods:

• Utilizing 3D-printed reaction vessels with open channels of varying dimensions.
• Studying the Belousov-Zhabotinsky (BZ) reaction within these custom-designed microenvironments.
• Analyzing the oscillatory and excitable properties of the BZ medium as a function of channel geometry.

Main Results:

• Demonstrated that channel geometry significantly modulates the excitability of the BZ medium.
• Showcased the ability to transition a continuously oscillating BZ medium to an excitable state by altering channel dimensions.
• Confirmed that 3D printing facilitates the fabrication of complex networks of interconnected reaction wells.

Conclusions:

• Engineered channel geometry in 3D-printed vessels can effectively control the excitability of the Belousov-Zhabotinsky reaction.
• This approach allows for the intrinsic design of excitable chemical media within reaction vessels.
• The findings open avenues for advanced research into networks of chemical oscillators and their applications.