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Colloidal precipitates

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Related Experiment Video

Updated: Mar 21, 2026

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles

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Crystallization behavior of iron-based amorphous nanoparticles prepared sonochemically.

Naoya Enomoto¹, Shingo Hirata¹, Miki Inada¹

¹Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Japan.

Ultrasonics Sonochemistry

|May 18, 2016

Summary

Ultrasonication enables rapid quenching for amorphous metal synthesis. Sonochemically derived amorphous iron was characterized, revealing a volatile component and reactivity upon oxidation.

Keywords:

Iron carbonyl Rapid quenching Sonochemical synthesis

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Area of Science:

Materials Science
Chemistry

Background:

Rapid quenching is crucial for amorphous metal production.
Intensive ultrasonication can induce rapid quenching via cavitation bubble heating.

Purpose of the Study:

To synthesize and characterize sonochemically derived amorphous iron.
To investigate the properties and reactivity of the amorphous iron product.

Main Methods:

Sonochemical synthesis from iron pentacarbonyl (Fe(CO)5).
Characterization using X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), and Thermogravimetric Differential Thermal Analysis (TG-DTA).
Annealing in an inert atmosphere and subsequent exposure to air.

Main Results:

Amorphous iron was successfully synthesized.
The product contained approximately 15% volatile components, removable by heating.
Annealed amorphous iron exhibited significant exothermic oxidation upon air exposure.

Conclusions:

Ultrasonication is an effective method for rapid quenching in liquid phase synthesis of amorphous metals.
The sonochemically derived amorphous iron is reactive and requires careful handling, particularly after annealing.