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Viscosity and Conductivity Tunable Diode-like Behavior for Meso- and Micropores
Yinghua Qiu1, Rachel A Lucas1, Zuzanna S Siwy1
1Department of Physics and Astronomy, ‡Department of Chemistry, §Department of Biomedical Engineering, University of California , Irvine, California 92697, United States.
The Journal of Physical Chemistry Letters
|August 3, 2017
Summary
This study presents precisely tunable rectifying meso-pores for ionic circuits and sensors. The pore
Area of Science:
- Nanotechnology and Materials Science
- Physical Chemistry
- Biophysics
Background:
- Rectifying pores are crucial for chemical sensors, ionic circuits, and biological channel mimics.
- Existing engineered pores show uncontrolled rectification extents despite similar diameters.
Purpose of the Study:
- To develop a highly predictable system for tunable ionic rectification.
- To precisely control current-voltage characteristics and rectification in meso-pores.
Main Methods:
- Fabrication of single meso-pores.
- Utilizing viscosity and conductivity gradients in solutions flanking the membrane.
- Investigating electroosmotically induced flow within the pores.
Main Results:
- Demonstrated precise tunability of current-voltage curves and rectification.
- Identified electroosmotically induced flow as the key rectification mechanism.
- Achieved predictable rectifying behavior in the meso-pore system.
Conclusions:
- The developed meso-pore system offers precise control over ionic transport.
- Applications include viscosity measurement and electrokinetic particle manipulation.
- This work advances the design of functional ionic systems.
