کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5361403 | 1503653 | 2014 | 4 صفحه PDF | دانلود رایگان |
- Porous silicon has been successful prepared by gold-assisted chemical etching method.
- It is the first time to report that the barium ferrite nanowires array has been fabricated by self-fabricated porous silicon template.
- The magnetic properties of the barium ferrite nanowire array have been studied.
In this work, we synthesize barium ferrite (BaFe12O19) nanowire array in porous silicon template. The porous silicon templates are prepared via gold-assisted chemical etching method. The gold (Au) nanoparticles with mean diameter of 30Â nm and distance of 100Â nm were ordered on the surface of Si substrate through the Polystyrene (510000)-block-poly (2-vinylpyridine) (31000) (PS510000-b-P2VP31000) diblock copolymer. Porous silicon templates with mean diameter of 500Â nm and distance between the pores of 500Â nm were fabricated by two etching steps. BaFe12O19 nanowires with mean diameter of 200Â nm were synthesized into a porous silicon template by a sol-gel method. Magnetic hysteresis loops show an isotropic feature of the BaFe12O19 nanowires array. The coercivity (Hc) and squareness ratio (Mr/Ms) of nanowire arrays are 2560Â Oe and 0.6, respectively.
Journal: Applied Surface Science - Volume 311, 30 August 2014, Pages 672-675