Potential-dependent topological modes in the mercury beating heart system

Area of Science:

• Electrochemistry
• Physical Chemistry
• Chemical Dynamics

Background:

• The mercury beating heart (MBH) system exhibits complex dynamics.
• Understanding MBH system behavior under external stimuli is crucial for exploring nonlinear chemical systems.

Purpose of the Study:

• To investigate the dynamics of the mercury beating heart (MBH) system in an acidic solution under an external square wave potential.
• To explore the stabilization of different topological shapes of the mercury drop by varying external potential frequency and mercury volume.
• To analyze the redox potential time series and power spectra corresponding to various stabilized configurations.

Main Methods:

• Experimental study of the MBH system in an acidic medium.
• Application of an external square wave potential to the system.
• Systematic variation of external potential frequency and mercury volume.
• Recording of redox potential time series.
• Analysis of power spectra for different topological modes.

Main Results:

• Stabilization of diverse mercury drop shapes (circular, elliptical, triangular, multilobed stars) was achieved by tuning external potential frequency and mercury volume.
• Redox potential time series and their power spectra were recorded for each stabilized topological configuration.
• The observed topological modes were reproducible and sustainable.
• A potential oxidation-reduction mechanism was proposed to explain the experimental findings.

Conclusions:

• The forced MBH system demonstrates controllable topological dynamics.
• External electrical forcing can stabilize distinct geometric configurations in the MBH system.
• The study provides insights into the redox mechanisms governing these complex electrochemical phenomena.