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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
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Chiral Molecular Ferroelectrics with Polarized Optical Effect and Electroresistive Switching
Wenxiu Gao1,2, Zhuolei Zhang1, Peng-Fei Li3
1Department of Mechanical Engineering and Temple Materials Institute, Temple University , Philadelphia, Pennsylvania 19122, United States.
ACS Nano
|November 15, 2017
Summary
This study introduces chiral ferroelectric thin films of (R)-(-)-3-hydroxyquinuclidinium chloride, demonstrating coupled chiral polarization and electroresistance. These materials exhibit tunable optical properties and significant electroresistive switching for advanced electronic applications.
Area of Science:
- Materials Science
- Solid-State Physics
- Organic Chemistry
Background:
- Chiral molecules exhibit unique properties due to stereoisomers and optical rotation.
- Chiral ferroelectricity couples polarized light with asymmetric dipole moments.
- Molecular ferroelectrics offer potential for multifunctional devices.
Purpose of the Study:
- To investigate chiral polarization and electroresistance in (R)-(-)-3-hydroxyquinuclidinium chloride thin films.
- To explore the electro-optic effects and angle-dependent optical behaviors.
- To assess the electroresistive switching performance and endurance.
Main Methods:
- Fabrication of (R)-(-)-3-hydroxyquinuclidinium chloride thin films.
- Characterization of ferroelectric properties and Curie temperature (340 K).
- Measurement of transmittance, linear electro-optic effect, and electroresistance.
Main Results:
- Demonstrated chiral polarization and electroresistance in the molecular ferroelectric films.
- Observed high transmittance coupled with polarized light, leading to angle-dependent optical behaviors.
- Achieved a large on/off ratio (∼26.6) for polarization-controlled electroresistive switching with superior antifatigue endurance.
Conclusions:
- Chiral ferroelectric thin films exhibit multifunctional properties suitable for optoelectronic applications.
- The observed linear electro-optic effect and electroresistive switching highlight potential for novel device designs.
- These materials offer a promising platform for developing advanced molecular electronic devices with tunable optical and electrical characteristics.
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