Water-Mediated
Ionic Migration in Memristive Nanowires
with a Tunable Resistive Switching Mechanism
Posted on 2020-10-14 - 18:33
Memristive
devices based on electrochemical resistive switching
effects have been proposed as promising candidates for in-memory computing
and for the realization of artificial neural networks. Despite great
efforts toward understanding the nanoionic processes underlying resistive
switching phenomena, comprehension of the effect of competing redox
processes on device functionalities from the materials perspective
still represents a challenge. In this work, we experimentally and
theoretically investigate the concurring reactions of silver and moisture
and their impact on the electronic properties of a single-crystalline
ZnO nanowire (NW). A decrease in electronic conductivity due to surface
adsorption of moisture is observed, whereas, at the same time, water
molecules reduce the energy barrier for Ag+ ion migration
on the NW surface, facilitating the conductive filament formation.
By controlling the relative humidity, the ratio of intrinsic electronic
conductivity and surface ionic conductivity can be tuned to modulate
the device performance. The results achieved on a single-crystalline
memristive model system shed new light on the dual nature of the mechanism
of how moisture affects resistive switching behavior in memristive
devices.
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Milano, Gianluca; Raffone, Federico; Luebben, Michael; Boarino, Luca; Cicero, Giancarlo; Valov, Ilia; et al. (2020). Water-Mediated
Ionic Migration in Memristive Nanowires
with a Tunable Resistive Switching Mechanism. ACS Publications. Collection. https://doi.org/10.1021/acsami.0c13020
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AUTHORS (7)
GM
Gianluca Milano
FR
Federico Raffone
ML
Michael Luebben
LB
Luca Boarino
GC
Giancarlo Cicero
IV
Ilia Valov
CR
Carlo Ricciardi
KEYWORDS
energy barrierdevice functionalitiesion migrationredox processesconductivitynanoionic processessurface adsorptionwater moleculesmoistureTunable Resistive Switching Mechani...conductive filament formationmaterials perspectivememristive devicessingle-crystalline memristive model...single-crystalline ZnO nanowireMemristive Nanowiresdevice performanceNW surface