Arrays of Magnetic Ni Nanowires Grown Inside Polystyrene Nanotubes
Arrays of Magnetic Ni Nanowires Grown Inside Polystyrene Nanotubes
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DOI：
10.1021/acs.iecr.5b02860
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发表时间：
2015-12
影响因子：
4.2
通讯作者：
Belén Sanz;E. M. Palmero;R. P. Real;M. Vázquez;C. Mijangos
中科院分区：
文献类型：
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作者：
Belén Sanz;E. M. Palmero;R. P. Real;M. Vázquez;C. Mijangos
首次采用电化学和化学相结合的方法在阳极氧化铝模板上合成了聚苯乙烯纳米管包覆的镍纳米线有序阵列。实现的长程六方有序的纳米管复合材料模仿的前体阳极氧化铝模板。所得的圆柱形复合材料，长度为25 μm，由外径为280 nm的聚合物纳米管壳填充直径为140 nm的金属磁性纳米线芯组成。纳米管复合阵列的磁性表征表明，存在一个有效的磁化容易轴平行的纳米线，主要归因于形状各向异性的Ni纳米线。此外，单个复合纳米线可以从膜中化学释放，这开辟了一条新的技术发展路线，其中单个复合纳米线受益于它们的聚合物官能化，同时在合适的磁场下被定向/移位。
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.