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- W1968047105 abstract "Abstract One-dimensional (1D) nanostructures with precise controlled morphologies have not been easily accessible, usually degrading the device performance and therefore limiting applications to various advanced nanoscale magnetism. Generally bulk chromium dioxides are prepared by solid/liquid-phase reactions at elevated pressures or the chemical vapor deposition procedure whereas a liquid synthesis at non-pressure conditions, particularly for sonochemical one, has really been a challenge. Here we report on an ultrasound fabrication of large-scale CrO 2 nanowires by using CrO 2 Cl 2 and homemade Cr 2 O 3 hollow nanospheres for the first time. The as-synthesized products were characterized by X-ray diffraction/photoelectron spectroscopy, scanning/transmission electron microscopy, high-resolution transmission electron microscopy, energy dispersive X-ray spectroscopy, selected area electron diffraction, and superconducting quantum interference devices magnetometer, respectively. The results show the controlled nanowires with diameter of 100–200 nm possess a single crystal tetragonal structure and exhibit a colossal coercive field (1678 Oe) at room-temperature, which could have potential applications in spin filtering, high density magnetic recording, and nanosensors. The proposed chemical reaction mechanism is suggested in detail and such a colossal coercive field is tentatively explained." @default.
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- W1968047105 date "2011-10-01" @default.
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- W1968047105 title "Sonochemical preparation of massive CrO2 nanowires" @default.
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- W1968047105 doi "https://doi.org/10.1016/j.cej.2011.08.052" @default.
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