Anisotropic Cu@Cu-BTC core-shell nanostructure for memory device

The activity and stability of Cu nanostructures strongly depend on their sizes, morphology and structures. Here we report the preparation of two-dimensional (2D) Cu@Cu-BTC core-shell nanosheets (NSs). The thickness of the Cu NSs could be tuned to sub-10 nm through a mild etching process, in which the Cu-BTC in situ grow along with the oxidation on the surface of the Cu NSs. This unique strategy can also be extended to synthesize one-dimensional (1D) Cu@Cu-BTC nanowires (NWs). Furthermore, the obtained Cu@Cu-BTC NSs could be applied as an effective material to the memory device with the write-once-read-many times (WORM) behavior and the high I _ON /I _OFF ratio (>2.7 × 10 ³ ).