Abstract
In this chapter, we have presented the latest synthetic methods for the production of magnetic engineered nanoparticles through mediated and modified polyol process with heat treatment process. The present scientific motivations and innovations of researchers are also essentially needed to discover simple, cheap, safe, and efficient physical and chemical methods for the controlled synthesis of metal, alloy, oxide, and core-shell nanomaterials, especially for magnetic nanoparticles by experimental processes. The modified polyol methods can lead to an available open way of making Co and its metallic magnetic nanoparticles with the most interestingly promising properties, and potential applications for life, industry, energy, and the environment. In this chapter, Co-based nanoparticles doped with rare earth by modified polyol processes are discussed in the controlled synthesis corresponding with the procedures of heat treatment. The intensive study of structural origin of hard magnets of SmCo5, Sm2Co17, Nd2Fe14B, ThMn12, Th2Zn17, and Th2Ni17 is very crucial in the production of magnetic materials with rare earth. Iron atoms in these original structures can be changed or replaced by other metal atoms, especially as cobalt atoms. Therefore, we also provide information and means to make research more systematic. In the highlights, controlled synthesis and magnetic properties of cobalt-based micro/nanomaterials by polyol-mediated methods will be the foundation in the key development of novel magnetic micro/nanomaterials.
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Acknowledgments
The author (N.V. Long) appreciates the kind assistance of research of Professor Tohsiharu Teranishi from Institute for Chemical Research, Kyoto University. The author (N.V. Long) is grateful for the kind assistance of research of Professor Satoshi Hirosawa, Elements Strategy Initiative Center for Magnetic Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan. The author (N.V. Long) appreciates the kind assistance of researchers of universities of Japan where he is dedicated to research, Nagoya Institute of Technology (NITECH) in cooperation and research with Professor Masayuki Nogami’s kind and special support and Kyushu University with Prof Michitaka Ohtaki. The author (N.V. Long) appreciates the kind and special assistance of research of Shanghai Institute of Ceramics, Chines Academy of Sciences (SICCAS) with Prof Yong Yang. N.V. Long thanks Vietnam National Foundation for Science & Technology Development NAFOSTED for financial support during his research of controlled synthesis of nanoparticles. The author (N.V. Long) appreciates the kind assistance of research of Ho Chi Minh City Institute of Physics (IOP), Vietnamese Academy of Sciences with Dr. Pham Minh Tien and MEg Le Hong Phuc for use of VSM (EV11-VSM Model). The authors (N.V.L & N.T.N.H) appreciate the kind assistance of University of Thu Dau Mot University, Binh Duong Province, Vietnam, for financial support during their research of controlled synthesis of nanoparticles. Kindly contact Dr. N.V. Long at his email nguyenviet_long@yahoo.com & nguyenvietlong@tdmu.edu.vn.
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Long, N.V., Hang, N.T.N., Yang, Y., Nogami, M. (2022). Synthesis of Cobalt and Its Metallic Magnetic Nanoparticles. In: Thomas, S., Rezazadeh Nochehdehi, A. (eds) Handbook of Magnetic Hybrid Nanoalloys and their Nanocomposites. Springer, Cham. https://doi.org/10.1007/978-3-030-90948-2_5
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