High-Pressure Phase Transitions of Morphologically Distinct Zn₂SnO₄ Nanostructures.

ABSTRACT: Many aspects of nanostructured materials at high pressures are still unexplored. We present here, high-pressure structural behavior of two Zn₂SnO₄ nanomaterials with inverse spinel type, one a particle with size of ∼7 nm [zero dimensional (0-D)] and the other with a chain-like [one dimensional (1-D)] morphology. We performed in situ micro-Raman and synchrotron X-ray diffraction measurements and observed that the cation disordering of the 0-D nanoparticle is preserved up to ∼40 GPa, suppressing the reported martensitic phase transformation. On the other hand, an irreversible phase transition is observed from the 1-D nanomaterial into a new and dense high-pressure orthorhombic CaFe₂O₄-type structure at ∼40 GPa. The pressure-treated 0-D and 1-D nano

SUBMITTER: Das PP 

PROVIDER: S-EPMC6649287 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature