Standard singular memcapacitive behavior is observed in a droplet interface bilayer system at small amplitudes and 鈥渉igh鈥� frequencies; behavior changes to a dual function at large amplitudes and 鈥渓ow鈥� frequencies.
Scientific Achievement
Dynamic impedance spectroscopy revealed that structural reorganization drives the memory behavior of membranes formed from lipid bilayers by deconvoluting memristance from memcapacitance.
Significance and Impact
Understanding how a membranes鈥� dielectric properties can be tuned by electric stimulation or other chemical changes opens the door to new memory behaviors and multiplexed functionality from two-terminal devices.
Research Details
- Dynamic impedance spectroscopy was used to probe nonlinear charging behavior in lipid bilayers as a function of biasing amplitude and frequency.
- Time-constant analysis distinguished memory behavior resulting from simple geometric changes (e.g., bilayer thickening) from structural reorganization (e.g., alkyl chain restructuring) that results in a change of the dielectric properties of the system.
R.L. Sacci, H.L. Scott, Z. Liu, D. Bolmatov, B. Doughty, J. Katsaras, and C.P. Collier, Advanced Electronic Materials 8 2200121 (2022). DOI: 10.1002/aelm.202200121
