Computer enhancement of ESR spectra of magnetite nanoparticles
| Autor: | Marceli Koralewski, Magdalena Hałupka-Bryl, Bernadeta Dobosz, Ryszard Krzyminiewski |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Resolution (electron density) Analytical chemistry Nanoparticle 02 engineering and technology equipment and supplies 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Magnetic field chemistry.chemical_compound Magnetic anisotropy Nuclear magnetic resonance chemistry Magnetic core Magnetic nanoparticles 0210 nano-technology human activities Line (formation) Magnetite |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 407:114-121 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2016.01.058 |
| Popis: | We present ESR measurements of non-interacting magnetic nanoparticle systems. Temperature and orientational dependence of ESR spectra were measured for Fe 3 O 4 nanoparticle coated by dextran or oleic acid, frozen in different magnetic field. Several parameters describing magnetic properties such as g -factor, line width, the anisotropy constant were calculated and discussed. The ESR spectra of investigated nanoparticles were also subjected to Computer Resolution Enhancement Method (CREM). This procedure allows to separate a narrow line on the background of the broad line, which presence in this type of materials was recognized in the recent literature and have been further discussed in the paper. CREM is a valuable tool for monitoring of changes on the surface of magnetic core of nanoparticles. |
| Databáze: | OpenAIRE |
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