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Self-directed growth of iron core–shell oval-shaped nanorods and nanocubes on a H-terminated Si(100) substrate in an external magnetic field

L Y Zhao, K R Eldridge, T Chan, N Panjwani and K T Leung1

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Iron core–shell oval-shaped nanorods and nanocubes were electrodeposited on a H-terminated Si(100) substrate with and without the presence of an externally applied magnetic field (with a flux density of 1.3 T). The presence of an external magnetic field during electrodeposition was found to produce clustering of oval-shaped nanorods with short-range ordering in the long-axis orientation, and to induce self-assembly of nanocubes into stripes along the field-line direction. Glancing-incidence x-ray diffraction showed that the magnetic field also changed the distribution of the crystal orientations of the Fe nanocubes. An external magnetic field applied during electrodeposition could therefore be used to manipulate the spatial and crystallographic arrangements of the deposited Fe nanoparticles.


PACS

81.16.Dn Self-assembly

61.05.cp X-ray diffraction

81.07.-b Nanoscale materials and structures: fabrication and characterization

61.46.-w Structure of nanoscale materials

68.37.Hk Scanning electron microscopy (SEM) (including EBIC)

Subjects

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 24 (20 June 2007)

Received 14 March 2007, in final form 11 April 2007

Published 25 May 2007



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