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Smartphone-Based Colorimetric Method to Quantify Iron Concentration and to Determine the Nanoparticle Size from Suspensions of Magnetic Nanoparticles |
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| Authors: | Yilian Fernández-Afonso Gorka Salas Irene Fernández-Barahona Fernando Herranz Cordula Grüttner Jesús Martínez de la Fuente María del Puerto Morales Lucía Gutiérrez |
| Institution: | 1. Department of Analytical Chemistry, Instituto Universitario de Nanociencia de Aragón (INA), Universidad de Zaragoza, Zaragoza, 50018 Spain
Instituto de Ciencia de Materiales de Aragón (ICMA), Zaragoza, 50018 Spain;2. IMDEA Nanociencia, Madrid, 28049 Spain;3. Instituto de Química Médica, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, 28006 Spain Facultad de Farmacia, Universidad Complutense de Madrid, Madrid, 28040 Spain;4. Instituto de Química Médica, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, 28006 Spain Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Madrid, 28006 Spain;5. Micromod Partikeltechnologie GmbH, Rostock, D-18119 Germany;6. Instituto de Ciencia de Materiales de Aragón (ICMA), Zaragoza, 50018 Spain Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza, 50018 Spain;7. Department of Energy, Environment and Health, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Madrid, 28049 Spain;8. Department of Analytical Chemistry, Instituto Universitario de Nanociencia de Aragón (INA), Universidad de Zaragoza, Zaragoza, 50018 Spain |
| Abstract: | Advanced uses of smartphones are changing lifestyles, and may have a great impact in materials science in the near future. In this work, the use of these devices to develop fast, simple, and cheap methods to characterize magnetic nanoparticle suspensions is tested. A series of dilutions of a wide library of magnetic nanoparticles, composed of iron oxide materials in the range between 3 and 43 nm, with two different shapes and four different coatings is prepared. The colloid color is analyzed using the RGB (red, green, blue) color model. Ratios of these parameters are correlated with the suspension iron concentration and with the nanoparticles average size. A linear relationship between the color (in particular the G/R ratio) and both the colloid iron content and the particles size is found. The link between these parameters allows the development of two new methods to determine either the concentration or the particle size of magnetic nanoparticle suspensions just by acquiring images from suspensions of iron oxide magnetic nanoparticles with a smartphone. |
| Keywords: | colorimetric methods iron oxides iron quantification magnetic nanoparticles particle size |