Nano Archive

Magnetic Fe2P nanowires and Fe2P@C core@shell nanocables

Wang, Junli and Yang, Qing and Zhou, Jun and Sun, Kewen and Zhang, Zude and Feng, Xiaoming and Li, Tanwei (2010) Magnetic Fe2P nanowires and Fe2P@C core@shell nanocables. Nano Research, 3 (3). pp. 211-221.

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We report the synthesis of one-dimensional (1-D) magnetic Fe2P nanowires and Fe2P@C core@shell nanocables by the reactions of triphenylphosphine (PPh3) with Fe powder (particles) and ferrocene (Fe(5H5)2), respectively, in vacuum-sealed ampoules at 380–400 °C. The synthesis is based on chemical conversion of micrometer or nanometer sized Fe particles into Fe2P via the extraction of phosphorus from liquid PPh3 at elevated temperatures. In order to control product diameters, a convenient sudden-temperature-rise strategy is employed, by means of which diameter-uniform Fe2P@C nanocables are prepared from the molecular precursor Fe(C5H5)2. In contrast, this strategy gives no obvious control over the diameters of the Fe2P nanowires obtained using elemental Fe as iron precursor. The formation of 1-D Fe2P nanostructures is ascribed to the cooperative effects of the kinetically induced anisotropic growth and the intrinsically anisotropic nature of hexagonal Fe2P crystals. The resulting Fe2P nanowires and Fe2P@C nanocables display interesting ferromagnetic-paramagnetic transition behaviors with blocking temperatures of 230 and 268 K, respectively, significantly higher than the ferromagnetic transition temperature of bulk Fe2P (T C = 217 K).

Item Type:Article
Uncontrolled Keywords:Metal phosphide - nanowires - core@shell nanocables - magnetic nanostructures - chemical synthesis
Subjects:Physical Science > Nanophysics
Material Science > Nanofabrication processes and tools
Physical Science > Nanomagnetics
ID Code:9016
Deposited By:Lesley Tobin
Deposited On:27 Jul 2010 12:31
Last Modified:27 Jul 2010 12:31

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