Mobility investigations of magnetic nanoparticles in biocomposites
| Autor: | Thomas Heinze, Samira Webers, Dmitry Borin, Soma Salamon, Joachim Landers, Heiko Wende, Robert Müller, Mengbo Zhou, Tim Liebert, Andrea Dellith |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Magnetometer Analytical chemistry 02 engineering and technology engineering.material Physik (inkl. Astronomie) 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Controlled release 0104 chemical sciences law.invention Magnetic field Chemical engineering Optical microscope Agglomerate law Mössbauer spectroscopy engineering Magnetic nanoparticles General Materials Science Biopolymer 0210 nano-technology |
| Popis: | Biocompatible composites are presented, consisting of magnetite nanoparticles embedded into a matrix of meltable dextran ester, which can be softened under an induced alternating magnetic field and may thereby allow magnetically controlled release applications. Temperature dependent mobility investigations of magnetic nanoparticles in the molten composites were carried out by optical microscopy, magnetometry, AC susceptibility and Mossbauer spectroscopy measurements. Optical microscopy shows a movement of agglomerates and texturing in the micrometer scale, whereas AC-susceptometry and Mossbauer spectroscopy investigations reveal that the particles perform diffusive Brownian motion in the liquid polymer melt as separated particles rather than as large agglomerates. |
| Databáze: | OpenAIRE |
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