Hierarchical magnetic assembly of nanowires
Hierarchical magnetic assembly of nanowires
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DOI：
10.1088/0957-4484/18/20/205305
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发表时间：
2007-05-23
期刊：
影响因子：
3.5
通讯作者：
Myung, Nosang V.
中科院分区：
文献类型：
--
作者：
Hangarter, Carlos M.;Rheem, Youngwoo;Myung, Nosang V.
磁性排列被报道为一种将纳米线组装成分级结构的简便技术。交叉结和T结纳米线网络，使用顺序对齐技术在未图案化的基板和预定义的光刻图案化的铁磁电极上进行了演示。T结的形成占主导地位，因为来自第一排列的纳米线在第二排列的外部磁场下表现为铁磁电极。预制的铁磁电极的存在下占主导地位的局部纳米线的偶极相互作用的优先排列。来自圆柱形同轴磁体的磁场的施加也已用于形成径向对准的纳米线。同轴圆柱形磁体的磁场在磁场的中心处由于径向场梯度而产生密集的同心纳米线配置，并且在外围场中产生稀疏的纳米线布置，其被用作具有同心电极设计的互连。
Magnetic alignment is reported as a facile technique for assembling nanowires into hierarchical structures. Cross junction and T junction nanowire networks are demonstrated using a sequential alignment technique on unpatterned substrates and predefined lithographically patterned ferromagnetic electrodes. The formation of T junctions prevails as nanowires from the first alignment behave as ferromagnetic electrodes under the external magnetic field of the second alignment. The presence of prefabricated ferromagnetic electrodes dominates dipole interactions of localized nanowires for preferential alignment. Application of a magnetic field from a cylindrical coaxial magnet has also been utilized to form radially aligned nanowires. The magnetic field of the coaxial cylindrical magnet produced a dense, concentric nanowire configuration at the centre of the magnetic field as a consequence of the radial field gradient, and sparse nanowire arrangements in the peripheral field, which were utilized as interconnects with a concentric electrode design.