Figure 3: Synchrotron hard X-ray nano-tomography of surface new phase.
From: Size-dependent surface phase change of lithium iron phosphate during carbon coating

(a,b) FIB milling process at the surface of C/LiFePO4 ingot sample. (c) The 3D morphology of the FIB sample. (d) The 2D chemical mapping of selected zone (white dashed box) at the FIB sample. (e) Fe K-edge of XANES profile of selected points in d. Scale bar, 20 μm (a,b), 5 μm (c) and 2 μm (d).