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Nanoscale LuFeO3: shape dependent ortho/hexa-phase constitution and nanogenerator application
Smita Chaturvedi1, Sachin Kumar Singh, Priyank Shyam
1Department of Physics and Centre for Energy Science, Indian Institute of Science Education and Research, Pune, Dr. Homi Bhabha Road, Pashan, Pune - 411008, India. smita.chaturvedi24@gmail.com satishogale@iiserpune.ac.in.
Hexagonal LuFeO3, a ferroelectric phase, is stabilized in nanomaterials by surface strain. Nanoparticle shape controls the hexagonal to orthorhombic phase ratio, enhancing nanogenerator performance.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- The hexagonal phase of LuFeO3 is a metastable, ferroelectric intermediate phase.
- Previously, it was only stabilized in thin films on substrates.
Purpose of the Study:
- To investigate the self-stabilization of the hexagonal LuFeO3 phase in nanomaterials.
- To determine the effect of nanomaterial shape on phase constitution and properties.
Main Methods:
- Synthesis of LuFeO3 nanoparticles and nanofibers.
- Characterization of phase composition using techniques sensitive to strain.
- Integration of nano-LuFeO3 into PDMS for nanogenerator fabrication and testing.
Main Results:
- Surface-induced strain in nano-systems self-stabilizes the hexagonal phase of LuFeO3.
- The ratio of hexagonal to orthorhombic phases is dependent on nanomaterial shape: nanoparticles (75:25) and nanofibers (23:77).
- Incorporation of nano-LuFeO3 into PDMS resulted in significant nanogenerator performance.
Conclusions:
- Nanomaterial shape is a critical factor in stabilizing the ferroelectric hexagonal phase of LuFeO3.
- The observed nanogenerator performance correlates with the ferroelectric phase content, demonstrating potential applications.
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