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Updated: Jul 2, 2025

Research and Development of High-performance Explosives

Research and Development of High-performance Explosives

Published on: February 20, 2016

Self-Propulsion by Directed Explosive Emulsification.

Xuefei Wu¹, Han Xue¹, Gautam Bordia^1,2

¹Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.

Advanced Materials (Deerfield Beach, Fla.)

|February 22, 2024

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This summary is machine-generated.

Scientists created an active droplet that moves autonomously. Stored energy from charged nanoparticles is released explosively, propelling the droplet using ejected microdroplets for controlled movement.

Area of Science:

Physics
Materials Science
Robotics

Background:

Active droplets offer potential for micro-robotics and drug delivery.
Controlling autonomous movement in soft matter systems remains a challenge.

Purpose of the Study:

To demonstrate a novel active droplet system capable of autonomous, directional movement.
To explore energy storage and release mechanisms for droplet propulsion.

Main Methods:

Storing Coulombic energy in charged nanoparticle-surfactant assemblies using a DC electric field.
Inducing directional propulsion through symmetry breaking in nanoparticle assemblies.
Analyzing microdroplet ejection dynamics and resulting forces.

Main Results:

Keywords:

charged nanoparticle‐surfactants directed explosive emulsification liquid–liquid interface self‐assembly self‐propulsion

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Published on: February 20, 2016

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Demonstrated autonomous, repeatable droplet propulsion at specific velocities and directions.
Showcased explosive ejection of thousands of charged microdroplets.
Confirmed that symmetry breaking controls propulsion direction and velocity.

Conclusions:

Developed a new type of active matter with potential applications in soft micro-robotics and targeted delivery.
Established a controllable propulsion mechanism for microscale systems.
Highlighted the versatility of the method, independent of nanoparticle chemistry.