Citric-acid-coated magnetite nanoparticles for biological applications |
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Authors: | M R?cuciu D E Creang? A Airinei |
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Institution: | (1) Faculty of Sciences, “Lucian Blaga” University, Victoriei Blvd., No.10, 550012 Sibiu, Romania;(2) Faculty of Physics, “Al. I. Cuza” University, 11A Blvd. Copou, Iasi, Romania;(3) “P. Poni” Macromolecular Chemistry Institute, Iasi, Romania |
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Abstract: | Water-based magnetic fluids, generally intended for biomedical applications, often have various coating molecules that make
them stable and compatible with biological liquids. Magnetic fluids containing iron oxide particles have been prepared by
a co-precipitation method, using citric acid as stabilizer. The magnetic particles of the magnetic fluids were obtained by
chemical precipitation from ferric ( FeCl3) and ferrous salts ( FeSO4 or FeCl2) in alkali medium (ammonia hydroxide). Citric acid was used to stabilize the magnetic-particle suspension. Physical tests
were performed in order to determine various microstructural and rheological features. Transmission electron microscopy was
the main investigation method for assessing the magnetic-particle size. The dimensional distribution of the magnetic-particle
physical diameter was analyzed using the box-plot statistical method while infrared absorption spectra were used to study
the colloidal particle structure. The magnetic-fluid density (picnometric method), viscosity (capillary method) and surface
tension (stalagmometric method) were measured using standard methods. |
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Keywords: | 47 65 Cb Magnetic fluids and ferrofluids 81 16 Be Chemical synthesis methods 96 15 Pf Physical properties of materials |
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