Acoustic spectroscopy of functionalized carbon nanotubes in magnetic fluid

摘要: Abstract Acoustic spectroscopy is used to study the rearrangements of multi-walled carbon nanotubes (MWCNTs) functionalized by Fe3O4 magnetic nanoparticles dissolved in transformer oil under influence a field at various temperatures. Three methods for application are used: jump change, linear increase or decrease and constant with change its orientation acoustic wave. The MWCNTs/Fe3O4 new structures (chains) confirmed changes attenuation. From measurement results, lifetime chains after switch-off less than 30 s. Such rapid due fact that nanotube held forces, resulting from same direction moments bound nanoparticles. A temperature-dependent hysteresis effect observed field. our experiments, it follows reorientation MWCNTs was gradual. anisotropy attenuation flux density 200 mT MWCNT/Fe3O4 concentrations diluted measurements their influences on structural developments discussed.