Five-fold Twinned Nanorods of FCC Fe: Synthesis and Characterization

Face-centered cubic (FCC) Fe nanorods with a 5-fold twinning structure were successfully fabricated with a polyethylene glycol (PEG) reduction and annealing method. The 5-fold twinning structure of the synthesized nanorods was thoroughly investigated using scanning electron microscopy (SEM), selected area electron diffraction (SAED), and high resolution transmission electron microscopy (HRTEM). The characterization results suggest that the FCC Fe nanorod has a 5-fold twinning crystal structure with < 110 > as its growth direction, bounded by five {100} planes at side surfaces and capped by ten {111} planes at end faces.