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

摘要

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.