Flow synthesis of iron oxide nanoparticles: using multiple precursor additions to improve size control

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Controlling nanoparticle size and uniformity in flow synthesis is challenging.
• Existing flow-based methods for iron oxide nanoparticle synthesis often lack precise size and shape control.

Purpose of the Study:

• To develop a novel flow-based synthesis method for uniform iron oxide nanoparticles.
• To improve size and shape control beyond conventional flow synthesis techniques.

Main Methods:

• Utilizing an extended LaMer mechanism for nanoparticle formation.
• Introducing additional iron precursor during the flow reaction to influence growth.
• Implementing a size focusing step within the continuous flow process.

Main Results:

• Achieved superior size and shape uniformity in iron oxide nanoparticles compared to conventional flow synthesis.
• Demonstrated systematic control over nanoparticle size through precursor injection.
• Established a new synthetic concept for enhanced uniformity in flow-based nanoparticle production.

Conclusions:

• The modified flow synthesis approach effectively addresses the challenge of uniform iron oxide nanoparticle production.
• This method offers a pathway for tunable nanoparticle size in continuous flow systems.
• The synthetic concept holds potential for broad application across various nanoparticle systems.