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Theoretical study on two-dimensional MoS2 piezoelectric nanogenerators

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This study employs the finite-element-method to examine the output characteristics of the two-dimensional MoS2 piezoelectric nanogenerator. Due to lack of center symmetry, the MoS2 flakes with odd number of atomic layers are capable of giving obvious piezoelectric output, which decreases upon the increases of the layer number. In addition, since the MoS2 nanogenerators are only few-atoms thick, they have smaller capacitance than the nanowire/film based nanogenerators, which enable them for potential high-frequency applications.

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