Creating Highly Sought Magnetic Nanoparticles in One Step

Structure of FeCo-Au nanocrystals. (a) CBED of the nanocrystal in (b), the two distorted hexagons (dot and dot-dash line) indicating two perpendicular Au [011]s. (b) a TEM bright field image of a nanocrystal. (c) illustration of the epitaxial relationship between the bcc FeCo (dotted line) and fcc Au (solid line) (smaller atom, Fe or Cu; larger atom, Au). (d) the perpendicular relationship between the two Au (110)s (indicated by arrows) at two neighboring facets of FeCo {100}, with a twinning at the rim. (e) a 3D illustration of a corner of the FeCo-Au nanocrystal. (f) HRTEM image of a corner of a nanocrystal with the same angle between the Au (111)s from the neighboring Au. Credit: NSLS