Here, a current-accelerated phase cycling by an current-induced oxidation process was demonstrated to reversibly switch the local metallic Cu and semiconducting CuO phases of patterned polycrystalline copper nanobelts. Once the Cu nanobelts were applied by a direct-current bias of ∼0.5 to 1 V in air with opposite polarities, the resistance between several hundred ohms and more than MΩ can be manipulated.
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