Abstract
Single crystalline MoO3 nanobelts were synthesized by a hydrothermal method, and one-dimensional nano-devices, Au/MoO3/Au, were fabricated with the MoO3 nanobelts. After electroforming under a bipolar voltage sweeping, stable unipolar switching with robust retention appeared, and the ON/OFF states of the unipolar switching differed by a resistance ratio of ∼103. The electroforming could be accounted for by the phase transformation between MoO3 and MoO2, and the unipolar switching by the formation/rupture of MoO2 filaments formed at dislocations or stacking faults.
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