A cycling endurance beyond 1000 cycles has been demonstrated using pulse trains for performing the reading and the changes between the two resistance states. Finally, the obtained results are explained according to the charge transport mechanisms underlying the three different conduction states (pristine,LRS, and HRS), which sheds light on the CNF formation and destruction processes within ZnO. Whilst other publications only perform a fitting of the experimental data using different conduction models but without discussing the extracted physical parameters,19–21 the hereby presented extended analysis of the I(V) curves of our devices allowed for the determination of structural parameters related to RS, such as the effective conductive area in LRS and the filament gap in HRS. The determination of these parameters has previously been carried out directly by transmission electron microscopy (TEM) techniques.22–24 However, in-situ and ex-situ observation of the creation of those conductive paths and their interruption is a complex procedure, as well as the fact that sample preparation and/or the observation itself may modify the local structure.
A cycling endurance beyond 1000 cycles has been demonstrated using pulse trains for performing the reading and the changes between the two resistance states. Finally, the obtained results are explained according to the charge transport mechanisms underlying the three different conduction states (pristine,LRS, and HRS), which sheds light on the CNF formation and destruction processes within ZnO. Whilst other publications only perform a fitting of the experimental data using different conduction models but without discussing the extracted physical parameters,19–21 the hereby presented extended analysis of the I(V) curves of our devices allowed for the determination of structural parameters related to RS, such as the effective conductive area in LRS and the filament gap in HRS. The determination of these parameters has previously been carried out directly by transmission electron microscopy (TEM) techniques.22–24 However, in-situ and ex-situ observation of the creation of those conductive paths and their interruption is a complex procedure, as well as the fact that sample preparation and/or the observation itself may modify the local structure.
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