Figure 2.

Typical SEM micrographs of nickel nanochains. a without magnetic field showing a dendritic morphology, b with a magnetic field of 5 kOe applied during the synthesis process, showing an axially aligned structure, c reorientation of the axially aligned Ni nanochains on a silicon substrate by a 2-kOe magnetic field. d XRD pattern of the powder sample shown in b

Li et al. Nanoscale Research Letters 2009 5:597-602   doi:10.1007/s11671-009-9512-6