کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5368368 1388390 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic characterization of vanadium oxide/polyaniline nanotubes
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Magnetic characterization of vanadium oxide/polyaniline nanotubes
چکیده انگلیسی

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 S = 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 254, Issue 1, 31 October 2007, Pages 371-374
نویسندگان
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