Synthesis of iron oxide nanoparticles in a polyimide matrix |
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Authors: | Lim Sung K Chung Keum Jee Kim Young-Ho Kim C K Yoon C S |
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Affiliation: | Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, South Korea. |
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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. |
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