The phase transition from H2Ti3O7 to TiO2 (B) in a 1D single nanocrystal of H2Ti3O7 was observed by in situ heating in a transmission electron microscope experimentally. The results indicate a typical monoclinic-to-monoclinic crystallographic orientation relationship between the two phases. Moreover, the fundamental building blocks and invariant deformation element model were both adopted to reveal the atomic mechanism and predict the crystallographic orientation relationship quantitatively for the phase transition. The prediction was precisely consistent with TEM results. Some like it hot: The predictable phase transition from H2Ti3O7 to TiO2 (B) in a 1D single-crystal nanofiber has been investigated by in situ heating during TEM (see figure). The results show a typical monoclinic-to-monoclinic relationship between the two phases, and the prediction of the crystallographic orientation relationship is precisely consistent with the TEM observations.
- Phase transformations
- Titanium dioxide
- Transmission electron microscopy