| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5368368 | Applied Surface Science | 2007 | 4 Pages |
Abstract
We present a magnetic study of vanadium oxide nanotubes (VOx-NTs) with polyaniline (PAni). Transmission electron microscopy (TEM) shows the tubular shape and the multi-wall structure of the nanotubes. The static magnetic susceptibility measured at different magnetic fields shows a Curie behavior, while the magnetization versus magnetic field presents a non-linear dependence at low temperatures. Both experiments can be explained by the presence of paramagnetic ions with SÂ =Â 1/2. Using Electron Paramagnetic Resonance technique, we identified as V4+(3d1) the paramagnetic ions present in the nanostructures. All the experimental results can be explained by a fraction between 14% and 18% of V4+ with respect to the total V atoms in the system.
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Authors
M.E. Saleta, J. Curiale, H.E. Troiani, S. Ribeiro Guevara, R.D. Sánchez, M. Malta, R.M. Torresi,