Quantification of magneto-optically active nanorods and inactive aggregates in nickel nanorod colloids
| Autor: | Andreas Tschöpe, Florian Krämer, K. Birster, R. Birringer, Micha Gratz |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Physics::Optics chemistry.chemical_element Nanotechnology 02 engineering and technology 01 natural sciences Condensed Matter::Materials Science Colloid Colloid and Surface Chemistry 0103 physical sciences Materials Chemistry Coagulation (water treatment) Physical and Theoretical Chemistry 010306 general physics Magneto Magnetic moment 021001 nanoscience & nanotechnology Surfaces Coatings and Films Dipole Nickel Ferromagnetism chemistry Chemical physics Nanorod 0210 nano-technology Biotechnology |
| Zdroj: | Colloid and Interface Science Communications. :11-14 |
| ISSN: | 2215-0382 |
| DOI: | 10.1016/j.colcom.2016.03.001 |
| Popis: | Nickel nanorods of sufficiently small size exhibit collinear ferromagnetic and optical anisotropy which allows the measurement of their field-dependent orientation in colloidal suspension by optical transmission of linearly polarized light. Coagulation of such extended dipolar particles favors the formation of flux-closing structures such as nanorod dimers with anti-parallel magnetic moments. We present an experimental approach to separate and quantify the fraction of magneto-optically active nanorods and inactive non-magnetic aggregates. The analysis was applied to monitor the coagulation of nanorod colloids which were deliberately destabilized by addition of NaCl. |
| Databáze: | OpenAIRE |
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