Figure 2
In situ E-TEM studies of the epitaxially-formed Co nanoparticles.
a, An in situ HRTEM lattice image of Co nanoparticles formed from the CoxMg1-xO solid solution after introducing 6.3 mbar CO into the TEM chamber at 600°C. b, The FFT digital diffractogram calculated from the whole image of a, showing in general the epitaxial relationship between fcc Co nanoparticles and the fcc MgO matrix. c and d, FFTs of selected regions in a denoted by R1 and R2, respectively, show well-defined [011]-zone axis patterns for both fcc MgO and fcc Co. e, A close-up of the framed area R3 in a displays the atomic arrangement of the epitaxial structure. f, A schematic representation of the Co-MgO lattice configurations, showing the formation of interfacial misfit dislocations and the severe lattice deformations in the Co nanoparticle.
