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Updated: Feb 12, 2026
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Preparation and 3D Tracking of Catalytic Swimming Devices
Published on: July 1, 2016
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A Pickering Emulsion Route to Swimming Active Janus Colloids
Richard J Archer1, Andrew J Parnell2, Andrew I Campbell3
1Department of Chemical and Biological Engineering The University of Sheffield Sheffield S13JD UK.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|April 6, 2018
Summary
Researchers developed a scalable method using Pickering emulsion masking and solution phase metallization to create self-motile catalytic Janus particles. This technique offers higher catalytic activity compared to traditional physical vapor deposition methods for active colloids.
Area of Science:
- Colloid and Surface Science
- Materials Science
- Nanotechnology
Background:
- Active colloids, particularly Janus particles, are crucial for exploring collective phenomena and enabling new applications.
- Current production of platinum-coated Janus particles relies on physical vapor deposition (PVD), a method that is difficult to scale and requires expensive equipment.
Purpose of the Study:
- To develop a scalable and cost-effective method for producing self-motile catalytic Janus particles.
- To compare the catalytic activity and motion of Janus particles produced via the new method with those made by PVD.
Main Methods:
- Utilized Pickering emulsion masking combined with solution phase metallization to create Janus particles.
- Deposited platinum onto hemispherical surfaces of particles to impart catalytic activity for hydrogen peroxide decomposition.
Main Results:
- Successfully produced self-motile catalytic Janus particles using the Pickering emulsion-based approach.
- Observed higher catalytic activity in the new Janus particles compared to PVD-produced particles of similar platinum thickness, attributed to the particulate nature of the coating.
Conclusions:
- The Pickering emulsion masking and solution phase metallization method provides a scalable and efficient route to active colloids.
- This new approach facilitates the production of Janus particles for diverse applications and advanced research in active colloid systems.
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