Fig. 2
From: Biomineralization of calcium phosphate revealed by in situ liquid-phase electron microscopy

In situ BF-STEM images showing initial nucleation and growth of CaP over 60 min. a–d Continuous mineralization from 0 to 14 min, showing the nucleation and growth of CaP particles. e Final-branched particle morphology after 60 min. f BF-TEM image of ex situ mineralization with similar resulting particle size and morphology after the same growth time. All scale bars represent 200 nm