The morphology modulation of target crystals is important for understanding their growth mechanisms and potential applications. Herein, we report a convenient method for modulating the morphology of MoO by controlling different growth temperatures. With an increase in growth temperature, the morphology of MoO changes from a nanoribbon to a nanoflake. Various characterization methods, including optical microscopy, atomic force microscopy, (vertical and tilted) scanning electron microscopy, Raman spectroscopy, high-resolution transmission electron microscopy, and selected area electron diffraction, were performed to unveil the morphology modulation and lattice structure of MoO. Both MoO nanoribbons and nanoflakes display a standing-up growth mode on c-sapphire substrates, and their basal planes are MoO(100). Further investigations into devices based on MoS with Au/Ti/MoO electrodes show the potential applications of MoO in two-dimensional electrodes. These findings are helpful for the synthesis of MoO with different morphologies and applications in the field of optoelectronic nanodevices.
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