Nano Archive

Hierarchical magnetic assembly of nanowires

Hangarter, Carlos M. and Rheem, Youngwoo and Yoo, Bongyoung and Yang, Eui-Hyeok and Myung, Nosang V. (2007) Hierarchical magnetic assembly of nanowires. Nanotechnology, 18 (20). pp. 205305-205312. ISSN 09574484

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Official URL: http://dx.doi.org/10.1088/0957-4484/18/20/205305

Abstract

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.

Item Type:Article
Subjects:Physical Science > Nanophysics
Analytical Science > Microscopy and probe methods
Physical Science > Nanoelectronics
Physical Science > Photonics
ID Code:190
Deposited By:Lesley Tobin
Deposited On:13 Nov 2008 16:49
Last Modified:26 Mar 2009 17:52

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