Magnetic anisotropy of functionalized multi-walled carbon nanotube suspensions (original) (raw)
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Walled Carbon Nanotube Suspensions
2018
We report on the magnetic properties of stable suspensions from oxidized 19 Multiwalled Carbon Nanotubes (MWCNT) functionalized with aminopyrene (AP). MWCNT form 20 stacking adducts with AP (AP-MWCNT), originating homogenous, stable, suspensions in 21 N,N-dimethylformamide (DMF) or melted agarose. First, we investigated the magneto-optical 22 properties of these adducts. When applying series of pulsed magnetic fields to nanotube 23 suspensions in DMF, the pattern of light dispersed increased during the magnetic pulse and 24 decreased in the intervals, a behavior consistent with magnetic field induced orientation of the 25 adducts. When adducts were suspended in a melted agarose gel under an external magnetic field, 26 the extinction coefficient of polarized light through the gel, was larger when the polarization plane 27 was parallel to the magnetic field direction. Based on the magneto-optical responses observed, we 28 further investigated the magnetic properties of AP-MWCNT im...
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