Arrays of Magnetic Ni Nanowires Grown Inside Polystyrene Nanotubes
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- 作者：Belén Sanz ; Ester M. Palmero ; Rafael P. del Real ; Manuel Vázquez ; Carmen Mijangos
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2015
- 出版时间：December 30, 2015
- 年：2015
- 卷：54
- 期：51
- 页码：13005-13008
- 全文大小：262K
- ISSN：1520-5045
文摘
Ordered arrays of nickel nanowires covered by polystyrene nanotubes have been synthesized for the first time by combined electrochemical and chemical routes into anodic alumina templates. The achieved long-range hexagonal ordering of nanowire–nanotube composite mimics that of the precursor anodic alumina oxide template. The resulting cylindrical composite, 25 μm in length, consists of a polymer nanotube shell of 280 nm outer diameter filled with a metallic magnetic nanowire core of 140 nm diameter. The magnetic characterization of the nanowire–nanotube composite array indicates the presence of an effective magnetization easy axis parallel to the nanowires, ascribed mostly to the shape anisotropy of Ni nanowires. Moreover, individual composite nanowires can be chemically released from the membrane which opens a new line of technological development in which single composite nanowires profit from their polymeric functionalization while being simultaneously oriented/displaced under suitable magnetic field.