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Published on: June 7, 2018
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Dynamic shock wave driven simultaneous crystallographic and molecular switching between α-Fe2O3 and Fe3O4
A Sivakumar1, A Rita1, S Sahaya Jude Dhas2
1Shock Wave Research Laboratory, Department of Physics, Abdul Kalam Research Center, Sacred Heart College, Tirupattur, Vellore 635601, Tamil Nadu, India.
Dalton Transactions (Cambridge, England : 2003)
|June 7, 2022
Summary
Researchers discovered switchable nanocrystalline iron oxide materials that transition between alpha-Fe2O3 and Fe3O4 phases under shock waves. This finding offers potential for novel sensors and molecular switching applications.
Area of Science:
- Materials Science
- Nanotechnology
- Solid-State Physics
Background:
- Switchable nanostructured materials are crucial for electronics but are scarce.
- Externally stimulated solid-state switchable phase transition materials are in high demand for industrial applications.
Purpose of the Study:
- To report the experimentally observed solid-state molecular level switchable phase transitions of nanocrystalline iron oxide materials.
- To investigate the phase transitions under dynamic shock wave loading conditions.
Main Methods:
- Dynamic shock wave loading of nanocrystalline iron oxide materials.
- Evaluation of phase transitions using diffraction, vibrational, and optical spectroscopic techniques.
Main Results:
- Demonstrated reversible phase transitions between alpha-Fe2O3 (R-3c) and Fe3O4 (Fd-3m) under dynamic shock waves.
- Observed simultaneous molecular and crystallographic switchable-phase-transitions enforced by dynamic shock waves.
Conclusions:
- Nanocrystalline iron oxide exhibits shock-wave-induced reversible phase transitions.
- The material is proposed for applications in sensors and molecular switching due to its switchable properties.
