Synthesis of iron oxide nanoparticles in a polyimide matrix

Sung K Lim; Keum Jee Chung; Young-Ho Kim; C K Kim; C S Yoon

doi:10.1016/j.jcis.2004.01.084

Synthesis of iron oxide nanoparticles in a polyimide matrix

J Colloid Interface Sci. 2004 May 15;273(2):517-22. doi: 10.1016/j.jcis.2004.01.084.

Authors

Sung K Lim¹, Keum Jee Chung, Young-Ho Kim, C K Kim, C S Yoon

Affiliation

¹ Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, South Korea.

PMID: 15082389
DOI: 10.1016/j.jcis.2004.01.084

Abstract

A monolayer of gamma-Fe(2)O(3) nanoparticles embedded in a polyimide (PI) matrix was fabricated by oxidizing an Fe metal film between two PI precursor layers. There was a critical Fe thickness ( approximately 7 nm) above which a continuous layer of gamma-Fe(2)O(3) film was formed in the PI film. Below the critical Fe thickness, the oxide film broke up into fine particles whose size was approximately 8 nm with narrow size distribution. It was further shown that these nanoparticles could have metallic cores, surrounded by an oxide layer. This method offers a unique way of covering a large surface area with fine magnetic oxide nanoparticles for potential application in high-density data-storage media.