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Single nanosized FeO nanocrystals with photoluminescence properties

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We have demonstrated a solution synthesis of crystalline FeO nanoparticles (NPs) with single nanosizes of 3–8 nm by refluxing FeCl3 in N,N-dimethylformamide (DMF) with oleic acid, followed by hydrothermal treatment. FeO is usually formed at high temperature and/or high pressure and is stable only above 560 °C. By employment of this DMF reduction method, we developed the synthesis of FeO NPs to the simplicity, lower temperature, and lower pressure of this method. We first found that the FeO NPs exhibit light blue photoluminescence. The photoluminescence properties of the FeO NPs are discussed in terms of their crystalline nature and surface characteristics.

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We thank Dr. R. Umeda and Prof. Y. Nishiyama at Kansai University for the measurements of the quantum yields of the iron oxide NPs. We also thank Dr. Yamazaki at Kobelco Research Institute, Inc. for TEM measurements. This study was supported in part by the “Strategic Project to Support the Formation of Research Bases at Private Universities” with matching Fund Subsidy from Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. This study was also partially supported by Grants-in-Aid for Scientific Research (Nos. 23360361, 23655074, and 22350040) from the Japan Society for the Promotion of Science (JSPS) and MEXT.

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Correspondence to Hideya Kawasaki.

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Sugii, Y., Inada, M., Yano, H. et al. Single nanosized FeO nanocrystals with photoluminescence properties. J Nanopart Res 15, 1379 (2013).

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