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Related Experiment Video

Updated: Oct 25, 2025

Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

Published on: January 28, 2022

"Ballistic" waves among chemically oscillating micromotors.

Qizhang Wang¹, Chao Zhou, Luyang Huang

¹School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, Guangdong 518055, China. weiwangsz@hit.edu.cn.

Chemical Communications (Cambridge, England)

|August 5, 2021

Summary

Chemically powered micromotors can form propagating "ballistic" waves. Chemical communication allows tuning of wave speed and frequency by adjusting population density or medium viscosity.

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Area of Science:

Chemical Engineering
Materials Science
Physics

Background:

Coordinating large populations of chemically powered micromotors is crucial for complex applications.
Information transmission across micromotor populations remains a significant challenge.

Purpose of the Study:

To demonstrate the emergence of propagating waves in a population of Janus micromotors.
To investigate the role of chemical communication in controlling wave dynamics.

Main Methods:

Utilized spontaneously oscillating, Janus-oriented micromotors capable of directed motion.
Analyzed wave propagation and dynamics under varying population densities and medium viscosities.

Main Results:

Observed the emergence of self-organized, propagating
ballistic
waves within the micromotor population.
Demonstrated that chemical communication enables control over individual micromotor and wave speed and frequency.
Showcased tunability by altering population density and medium viscosity.

Conclusions:

Propagating waves can emerge from coordinated chemical communication among micromotors.
Chemical communication offers a viable strategy for controlling collective behavior and information transfer in micromotor systems.
This work lays the foundation for advanced applications requiring synchronized micromotor populations.