Hydrothermal synthesis and magnetic properties of {alpha}-MnO{sub 2} nanowires
- National Laboratory of Microstructure and Department of Physics, Nanjing University, Nanjing 210093 (China)
Highlights: Black-Right-Pointing-Pointer {alpha}-MnO{sub 2} nanowires were synthesized through the hydrothermal method. Black-Right-Pointing-Pointer Ferromagnetism was observed in the {alpha}-MnO{sub 2} nanowires at 5 K. Black-Right-Pointing-Pointer The N{sub 2} adsorption-desorption experiment shows that surface area of {alpha}-MnO{sub 2} nanowires is 160.4 m{sup 2} g{sup -1}. -- Abstract: In the present study, one-dimensional (1D) {alpha}-MnO{sub 2} nanowires with width of 50-60 nm, length about several micrometers have been successfully prepared under hydrothermal conditions in the presence of sodium carboxymethyl cellulose. The samples were characterized by X-ray diffraction, scanning electron microscope, superconducting quantum interference device and N{sub 2} adsorption-desorption experiment. The magnetic measurement reveals that the {alpha}-MnO{sub 2} nanowires exhibit a ferromagnetic behavior at 5 K and a paramagnetic behavior at 300 K. The N{sub 2} adsorption-desorption experiment shows that surface area is 160.4 m{sup 2} g{sup -1}, which is even larger than those of mesoporous nanostructures. At the same time, the possible formation mechanism for the formation of {alpha}-MnO{sub 2} nanowires has been proposed according to the experimental results.
- OSTI ID:
- 22212480
- Journal Information:
- Materials Research Bulletin, Vol. 47, Issue 3; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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