Facile polyol synthesis of ultrasmall water-soluble cobalt ferrite nanoparticles |
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| Institution: | 1. Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, 31270-901, Belo Horizonte, MG, Brazil;2. Centro de Microscopia da UFMG, 31270-901, Belo Horizonte, MG, Brazil;3. Departamento de Física, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, MG, Brazil;1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People''s Republic of China;2. University of Science and Technology of China, Hefei 230026, People''s Republic of China;3. High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People''s Republic of China;4. Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People''s Republic of China;1. Department of Physics, Himachal Pradesh University, Shimla, 171005, India;2. CSIR-National Physical Laboratory, Dr. K.S. Krishnan Road, New Delhi, 110012, India;1. Department of Industrial Engineering, School of Engineering, Federal University of Rio Grande do Sul, Osvaldo Aranha 99, Porto Alegre, RS, Brazil;2. Department of Materials Engineering, School of Engineering, Federal University of Rio Grande do Sul, Osvaldo Aranha 99, Porto Alegre, RS, Brazil;3. Postgraduate Program in Materials Science and Engineering (PPGCEM), Laboratory of Technical Ceramics (CerTec), Universidade do Extremo Sul Catarinense (UNESC), Av. Universitária 1105, Criciúma, SC, Brazil;4. Institute of Physics, Federal University of Rio Grande do Sul, Bento Gonçalves 9500, Porto Alegre, RS, Brazil |
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| Abstract: | A facile protocol to prepare ultrasmall citrate-coated cobalt ferrite NPs was proposed from the comparison between one-step and two-step chemical routes based on the polyol method. Infrared spectroscopy, thermogravimetry and zeta potential data indicated different coordinations of citrate groups affecting the NP colloidal stability. The magnetic core size and saturation magnetization were also affected. The surface-modified NPs prepared by the one-step route presented superior colloidal stability, low core (2.9 nm) and hydrodynamic (4.8 nm) sizes, high magnetization (45 emu/g), and can be considered suitable platforms to produce nanoparticle-biomolecule conjugates. |
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| Keywords: | Hydrophilic nanoparticles Polyol method Cobalt ferrite Surface coating Biomedicine |
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