Uncovered reversible giant deformation of individual semiconductor nanocrystals using in-situ liquid cell transmission electron microscopy.
Significance and Impact
An understanding of the dynamic deformability of nanocrystals is critical to achieving nanocrystal superlattices with structural perfection, thus enhancing the performance of semiconductor nanocrystals in many applications.
- In-situ liquid cell TEM imaging revealed the unexpected phenomenon that PbSe semiconductor nanocrystals may drastically change shape during superlattice phase transitions.
- The deformability of semiconductor nanocrystals is reversible and can be controlled by the chemical environments upon ligand removal.
- The large deformation, which is responsible for the structural defects in the epitaxially-fused nanocrystal superlattice, may arise from inter-nanocrystal dipole–dipole interactions.