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RESEARCH PRODUCT
Negative differential resistance and threshold-switching in conical nanopores with KF solutions
Mubarak AliSaima NasirJose J. Perez-grauPatricio RamirezWolfgang EnsingerSalvador MafeJavier Cerverasubject
010302 applied physicsRange (particle radiation)NanostructureMaterials sciencePhysics and Astronomy (miscellaneous)Condensed matter physics02 engineering and technologyConical surface021001 nanoscience & nanotechnology01 natural sciencesNanopore0103 physical sciencesPhenomenological modelCurrent (fluid)Differential (infinitesimal)0210 nano-technologyVoltagedescription
Negative differential resistance (NDR) phenomena are under-explored in nanostructures operating in the liquid state. We characterize experimentally the NDR and threshold switching phenomena observed when conical nanopores are immersed in two identical KF solutions at low concentration. Sharp current drops in the nA range are obtained for applied voltages exceeding thresholds close to 1 V and a wide frequency window, which suggests that the threshold switching can be used to amplify small electrical perturbations because a small change in voltage typically results in a large change in current. While we have not given a detailed physical mechanism here, a phenomenological model is also included.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-05-03 | Applied Physics Letters |