Voltage-Modulated Untwist Deformations and Multispectral Optical Effects from Ion Intercalation into Chiral Ceramic...

Area of Science:

• Materials Science
• Nanotechnology
• Optics

Background:

• Chiral ceramic nanostructures can exhibit strong chiroptical effects.
• Ion intercalation can reconfigure nanostructures, influencing their properties.

Purpose of the Study:

• To investigate the effect of ion intercalation on the chirality and chiroptical properties of vanadium oxide (V2O3) nanoparticles.
• To explore the potential of these modified nanoparticles in photonic devices.

Main Methods:

• Synthesis of V2O3 nanoparticles with built-in chiral distortions using tartaric acid enantiomers.
• Ion intercalation of Zn2+ into V2O3 lattice.
• Spectroscopy and microscopy techniques to analyze nanoscale chirality.
• Fabrication of layer-by-layer (LBL) assembled nanocomposite films.

Main Results:

• Zn2+ intercalation caused V2O3 nanoparticle expansion, untwisting, and reduced chirality.
• Observed significant changes in circular polarization bands across UV, visible, and IR spectra.
• Achieved g-factors for IR and NIR diapasons 100-400 times higher than previously reported nanoparticles.
• Demonstrated cyclic-voltage-driven modulation of optical activity in LBL nanocomposite films.

Conclusions:

• Chiral V2O3 nanoparticles offer a versatile platform for photonic devices due to high optical activity and tunable properties.
• The observed phenomena are expected in other chiral ceramic nanostructures, opening avenues for new optical, electrical, and magnetic materials.
• Developed device prototypes for IR and NIR applications, outperforming existing organic materials.